diff --git a/atk/src/auto/versions.txt b/atk/src/auto/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/atk/src/auto/versions.txt
+++ b/atk/src/auto/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/atk/sys/versions.txt b/atk/sys/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/atk/sys/versions.txt
+++ b/atk/sys/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/examples/basic_subclass/simple_application/mod.rs b/examples/basic_subclass/simple_application/mod.rs
index 5b845a67e3d3..3be7dbd9a863 100644
--- a/examples/basic_subclass/simple_application/mod.rs
+++ b/examples/basic_subclass/simple_application/mod.rs
@@ -15,6 +15,5 @@ impl SimpleApplication {
             ("application-id", &"org.gtk-rs.SimpleApplication"),
             ("flags", &ApplicationFlags::empty()),
         ])
-        .expect("Failed to create SimpleApp")
     }
 }
diff --git a/examples/basic_subclass/simple_window/mod.rs b/examples/basic_subclass/simple_window/mod.rs
index 6460cdb0821e..69cf4ff1b7ba 100644
--- a/examples/basic_subclass/simple_window/mod.rs
+++ b/examples/basic_subclass/simple_window/mod.rs
@@ -11,6 +11,6 @@ glib::wrapper! {
 
 impl SimpleWindow {
     pub fn new(app: &SimpleApplication) -> Self {
-        glib::Object::new(&[("application", app)]).expect("Failed to create SimpleWindow")
+        glib::Object::new(&[("application", app)])
     }
 }
diff --git a/examples/composite_template/example_application_window/mod.rs b/examples/composite_template/example_application_window/mod.rs
index 4d74d9f7f6af..bf46547f3b8c 100644
--- a/examples/composite_template/example_application_window/mod.rs
+++ b/examples/composite_template/example_application_window/mod.rs
@@ -12,7 +12,6 @@ glib::wrapper! {
 impl ExampleApplicationWindow {
     pub fn new<P: glib::IsA<gtk::Application>>(app: &P) -> Self {
         glib::Object::new(&[("application", app)])
-            .expect("Failed to create ExampleApplicationWindow")
     }
 
     fn init_label(&self) {
diff --git a/examples/list_box_model/model/mod.rs b/examples/list_box_model/model/mod.rs
index 8fd89b1dd4b2..d67ed339e518 100644
--- a/examples/list_box_model/model/mod.rs
+++ b/examples/list_box_model/model/mod.rs
@@ -15,7 +15,7 @@ glib::wrapper! {
 impl Model {
     #[allow(clippy::new_without_default)]
     pub fn new() -> Model {
-        glib::Object::new(&[]).expect("Failed to create Model")
+        glib::Object::new(&[])
     }
 
     pub fn append(&self, obj: &RowData) {
diff --git a/examples/list_box_model/row_data/mod.rs b/examples/list_box_model/row_data/mod.rs
index bfab23c3c600..e5a5b071da9c 100644
--- a/examples/list_box_model/row_data/mod.rs
+++ b/examples/list_box_model/row_data/mod.rs
@@ -18,6 +18,6 @@ glib::wrapper! {
 // initial values for our two properties and then returns the new instance
 impl RowData {
     pub fn new(name: &str, count: u32) -> RowData {
-        glib::Object::new(&[("name", &name), ("count", &count)]).expect("Failed to create row data")
+        glib::Object::new(&[("name", &name), ("count", &count)])
     }
 }
diff --git a/gdk/src/auto/versions.txt b/gdk/src/auto/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/gdk/src/auto/versions.txt
+++ b/gdk/src/auto/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/gdk/sys/versions.txt b/gdk/sys/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/gdk/sys/versions.txt
+++ b/gdk/sys/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/gdkx11/src/auto/versions.txt b/gdkx11/src/auto/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/gdkx11/src/auto/versions.txt
+++ b/gdkx11/src/auto/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/gdkx11/src/auto/x11_device_manager_xi2.rs b/gdkx11/src/auto/x11_device_manager_xi2.rs
index f97d9fb66e01..270a17e54756 100644
--- a/gdkx11/src/auto/x11_device_manager_xi2.rs
+++ b/gdkx11/src/auto/x11_device_manager_xi2.rs
@@ -80,7 +80,6 @@ impl X11DeviceManagerXI2Builder {
             properties.push(("display", display));
         }
         glib::Object::new::<X11DeviceManagerXI2>(&properties)
-            .expect("Failed to create an instance of X11DeviceManagerXI2")
     }
 
     pub fn major(mut self, major: i32) -> Self {
diff --git a/gdkx11/src/auto/x11_device_xi2.rs b/gdkx11/src/auto/x11_device_xi2.rs
index c08f6b1b9645..28ce708f9a73 100644
--- a/gdkx11/src/auto/x11_device_xi2.rs
+++ b/gdkx11/src/auto/x11_device_xi2.rs
@@ -92,7 +92,6 @@ impl X11DeviceXI2Builder {
             properties.push(("vendor-id", vendor_id));
         }
         glib::Object::new::<X11DeviceXI2>(&properties)
-            .expect("Failed to create an instance of X11DeviceXI2")
     }
 
     pub fn device_id(mut self, device_id: i32) -> Self {
diff --git a/gdkx11/sys/versions.txt b/gdkx11/sys/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/gdkx11/sys/versions.txt
+++ b/gdkx11/sys/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/gir b/gir
index 54e116a11822..b5068ede6c51 160000
--- a/gir
+++ b/gir
@@ -1 +1 @@
-Subproject commit 54e116a1182253b6459f174155b1018a0ada289f
+Subproject commit b5068ede6c51f47c84ac0308d8d48110b9a6e086
diff --git a/gtk/src/auto/about_dialog.rs b/gtk/src/auto/about_dialog.rs
index 74edc3ed68e2..bcc890d8ab4f 100644
--- a/gtk/src/auto/about_dialog.rs
+++ b/gtk/src/auto/about_dialog.rs
@@ -396,7 +396,6 @@ impl AboutDialogBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<AboutDialog>(&properties)
-            .expect("Failed to create an instance of AboutDialog")
     }
 
     pub fn artists(mut self, artists: Vec<String>) -> Self {
diff --git a/gtk/src/auto/accel_label.rs b/gtk/src/auto/accel_label.rs
index c536ba587f4e..18f9d82a8de8 100644
--- a/gtk/src/auto/accel_label.rs
+++ b/gtk/src/auto/accel_label.rs
@@ -53,7 +53,6 @@ impl AccelLabel {
 impl Default for AccelLabel {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct AccelLabel object with default parameters")
     }
 }
 
@@ -291,7 +290,6 @@ impl AccelLabelBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<AccelLabel>(&properties)
-            .expect("Failed to create an instance of AccelLabel")
     }
 
     pub fn accel_closure(mut self, accel_closure: &glib::Closure) -> Self {
diff --git a/gtk/src/auto/action_bar.rs b/gtk/src/auto/action_bar.rs
index d37603896670..ad73026fd4e8 100644
--- a/gtk/src/auto/action_bar.rs
+++ b/gtk/src/auto/action_bar.rs
@@ -211,7 +211,6 @@ impl ActionBarBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<ActionBar>(&properties)
-            .expect("Failed to create an instance of ActionBar")
     }
 
     pub fn border_width(mut self, border_width: u32) -> Self {
diff --git a/gtk/src/auto/adjustment.rs b/gtk/src/auto/adjustment.rs
index 049848f9c701..13a44614df68 100644
--- a/gtk/src/auto/adjustment.rs
+++ b/gtk/src/auto/adjustment.rs
@@ -59,7 +59,6 @@ impl Adjustment {
 impl Default for Adjustment {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Adjustment object with default parameters")
     }
 }
 
@@ -109,7 +108,6 @@ impl AdjustmentBuilder {
             properties.push(("value", value));
         }
         glib::Object::new::<Adjustment>(&properties)
-            .expect("Failed to create an instance of Adjustment")
     }
 
     pub fn lower(mut self, lower: f64) -> Self {
diff --git a/gtk/src/auto/app_chooser_button.rs b/gtk/src/auto/app_chooser_button.rs
index 9e71248e6e07..fd44a0e975c2 100644
--- a/gtk/src/auto/app_chooser_button.rs
+++ b/gtk/src/auto/app_chooser_button.rs
@@ -61,7 +61,6 @@ impl AppChooserButton {
 impl Default for AppChooserButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct AppChooserButton object with default parameters")
     }
 }
 
@@ -299,7 +298,6 @@ impl AppChooserButtonBuilder {
             properties.push(("content-type", content_type));
         }
         glib::Object::new::<AppChooserButton>(&properties)
-            .expect("Failed to create an instance of AppChooserButton")
     }
 
     pub fn heading(mut self, heading: &str) -> Self {
diff --git a/gtk/src/auto/app_chooser_dialog.rs b/gtk/src/auto/app_chooser_dialog.rs
index 4864ffc3d954..880205791f1e 100644
--- a/gtk/src/auto/app_chooser_dialog.rs
+++ b/gtk/src/auto/app_chooser_dialog.rs
@@ -85,7 +85,6 @@ impl AppChooserDialog {
 impl Default for AppChooserDialog {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct AppChooserDialog object with default parameters")
     }
 }
 
@@ -379,7 +378,6 @@ impl AppChooserDialogBuilder {
             properties.push(("content-type", content_type));
         }
         glib::Object::new::<AppChooserDialog>(&properties)
-            .expect("Failed to create an instance of AppChooserDialog")
     }
 
     pub fn gfile(mut self, gfile: &impl IsA<gio::File>) -> Self {
diff --git a/gtk/src/auto/app_chooser_widget.rs b/gtk/src/auto/app_chooser_widget.rs
index eb13079f033a..2febc22dd166 100644
--- a/gtk/src/auto/app_chooser_widget.rs
+++ b/gtk/src/auto/app_chooser_widget.rs
@@ -59,7 +59,6 @@ impl AppChooserWidget {
 impl Default for AppChooserWidget {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct AppChooserWidget object with default parameters")
     }
 }
 
@@ -269,7 +268,6 @@ impl AppChooserWidgetBuilder {
             properties.push(("content-type", content_type));
         }
         glib::Object::new::<AppChooserWidget>(&properties)
-            .expect("Failed to create an instance of AppChooserWidget")
     }
 
     pub fn default_text(mut self, default_text: &str) -> Self {
diff --git a/gtk/src/auto/application.rs b/gtk/src/auto/application.rs
index 1ac8c2221838..0bca08996772 100644
--- a/gtk/src/auto/application.rs
+++ b/gtk/src/auto/application.rs
@@ -89,8 +89,7 @@ impl ApplicationBuilder {
         if let Some(ref resource_base_path) = self.resource_base_path {
             properties.push(("resource-base-path", resource_base_path));
         }
-        let ret = glib::Object::new::<Application>(&properties)
-            .expect("Failed to create an instance of Application");
+        let ret = glib::Object::new::<Application>(&properties);
         {
             Application::register_startup_hook(&ret);
         }
diff --git a/gtk/src/auto/application_window.rs b/gtk/src/auto/application_window.rs
index f4c251595370..3aeff8da3387 100644
--- a/gtk/src/auto/application_window.rs
+++ b/gtk/src/auto/application_window.rs
@@ -323,7 +323,6 @@ impl ApplicationWindowBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<ApplicationWindow>(&properties)
-            .expect("Failed to create an instance of ApplicationWindow")
     }
 
     pub fn show_menubar(mut self, show_menubar: bool) -> Self {
diff --git a/gtk/src/auto/aspect_frame.rs b/gtk/src/auto/aspect_frame.rs
index c7abacb37aaa..5f85beb54b07 100644
--- a/gtk/src/auto/aspect_frame.rs
+++ b/gtk/src/auto/aspect_frame.rs
@@ -66,7 +66,6 @@ impl AspectFrame {
 impl Default for AspectFrame {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct AspectFrame object with default parameters")
     }
 }
 
@@ -268,7 +267,6 @@ impl AspectFrameBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<AspectFrame>(&properties)
-            .expect("Failed to create an instance of AspectFrame")
     }
 
     pub fn obey_child(mut self, obey_child: bool) -> Self {
diff --git a/gtk/src/auto/assistant.rs b/gtk/src/auto/assistant.rs
index b9f2c2925e91..6329adb60078 100644
--- a/gtk/src/auto/assistant.rs
+++ b/gtk/src/auto/assistant.rs
@@ -336,7 +336,6 @@ impl AssistantBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<Assistant>(&properties)
-            .expect("Failed to create an instance of Assistant")
     }
 
     pub fn use_header_bar(mut self, use_header_bar: i32) -> Self {
diff --git a/gtk/src/auto/box_.rs b/gtk/src/auto/box_.rs
index 17677041ac12..ed6367b42924 100644
--- a/gtk/src/auto/box_.rs
+++ b/gtk/src/auto/box_.rs
@@ -55,7 +55,6 @@ impl Box {
 impl Default for Box {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Box object with default parameters")
     }
 }
 
@@ -236,7 +235,7 @@ impl BoxBuilder {
         if let Some(ref orientation) = self.orientation {
             properties.push(("orientation", orientation));
         }
-        glib::Object::new::<Box>(&properties).expect("Failed to create an instance of Box")
+        glib::Object::new::<Box>(&properties)
     }
 
     pub fn baseline_position(mut self, baseline_position: BaselinePosition) -> Self {
diff --git a/gtk/src/auto/button.rs b/gtk/src/auto/button.rs
index ca529811519d..f12d8e9dbab2 100644
--- a/gtk/src/auto/button.rs
+++ b/gtk/src/auto/button.rs
@@ -283,7 +283,7 @@ impl ButtonBuilder {
         if let Some(ref action_target) = self.action_target {
             properties.push(("action-target", action_target));
         }
-        glib::Object::new::<Button>(&properties).expect("Failed to create an instance of Button")
+        glib::Object::new::<Button>(&properties)
     }
 
     pub fn always_show_image(mut self, always_show_image: bool) -> Self {
diff --git a/gtk/src/auto/button_box.rs b/gtk/src/auto/button_box.rs
index 764eb7d1ea40..4e4c4559d052 100644
--- a/gtk/src/auto/button_box.rs
+++ b/gtk/src/auto/button_box.rs
@@ -55,7 +55,6 @@ impl ButtonBox {
 impl Default for ButtonBox {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct ButtonBox object with default parameters")
     }
 }
 
@@ -241,7 +240,6 @@ impl ButtonBoxBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<ButtonBox>(&properties)
-            .expect("Failed to create an instance of ButtonBox")
     }
 
     pub fn layout_style(mut self, layout_style: ButtonBoxStyle) -> Self {
diff --git a/gtk/src/auto/calendar.rs b/gtk/src/auto/calendar.rs
index 64fc242babd0..610c8d836f1a 100644
--- a/gtk/src/auto/calendar.rs
+++ b/gtk/src/auto/calendar.rs
@@ -242,7 +242,6 @@ impl CalendarBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<Calendar>(&properties)
-            .expect("Failed to create an instance of Calendar")
     }
 
     pub fn day(mut self, day: i32) -> Self {
diff --git a/gtk/src/auto/cell_area_box.rs b/gtk/src/auto/cell_area_box.rs
index 090cb7fe8b35..6f9e1229aeb4 100644
--- a/gtk/src/auto/cell_area_box.rs
+++ b/gtk/src/auto/cell_area_box.rs
@@ -86,7 +86,6 @@ impl CellAreaBoxBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<CellAreaBox>(&properties)
-            .expect("Failed to create an instance of CellAreaBox")
     }
 
     pub fn spacing(mut self, spacing: i32) -> Self {
diff --git a/gtk/src/auto/cell_renderer_accel.rs b/gtk/src/auto/cell_renderer_accel.rs
index fc4e77bbb725..96b90f0597ed 100644
--- a/gtk/src/auto/cell_renderer_accel.rs
+++ b/gtk/src/auto/cell_renderer_accel.rs
@@ -329,7 +329,6 @@ impl CellRendererAccelBuilder {
             properties.push(("ypad", ypad));
         }
         glib::Object::new::<CellRendererAccel>(&properties)
-            .expect("Failed to create an instance of CellRendererAccel")
     }
 
     pub fn accel_key(mut self, accel_key: u32) -> Self {
diff --git a/gtk/src/auto/cell_renderer_combo.rs b/gtk/src/auto/cell_renderer_combo.rs
index 9a6abf128858..effc227fa73a 100644
--- a/gtk/src/auto/cell_renderer_combo.rs
+++ b/gtk/src/auto/cell_renderer_combo.rs
@@ -326,7 +326,6 @@ impl CellRendererComboBuilder {
             properties.push(("ypad", ypad));
         }
         glib::Object::new::<CellRendererCombo>(&properties)
-            .expect("Failed to create an instance of CellRendererCombo")
     }
 
     pub fn has_entry(mut self, has_entry: bool) -> Self {
diff --git a/gtk/src/auto/cell_renderer_pixbuf.rs b/gtk/src/auto/cell_renderer_pixbuf.rs
index aa616195e790..6f2fe018c05e 100644
--- a/gtk/src/auto/cell_renderer_pixbuf.rs
+++ b/gtk/src/auto/cell_renderer_pixbuf.rs
@@ -158,7 +158,6 @@ impl CellRendererPixbufBuilder {
             properties.push(("ypad", ypad));
         }
         glib::Object::new::<CellRendererPixbuf>(&properties)
-            .expect("Failed to create an instance of CellRendererPixbuf")
     }
 
     pub fn gicon(mut self, gicon: &impl IsA<gio::Icon>) -> Self {
diff --git a/gtk/src/auto/cell_renderer_progress.rs b/gtk/src/auto/cell_renderer_progress.rs
index d12b99f54a1b..e40eb31d49d7 100644
--- a/gtk/src/auto/cell_renderer_progress.rs
+++ b/gtk/src/auto/cell_renderer_progress.rs
@@ -156,7 +156,6 @@ impl CellRendererProgressBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<CellRendererProgress>(&properties)
-            .expect("Failed to create an instance of CellRendererProgress")
     }
 
     pub fn inverted(mut self, inverted: bool) -> Self {
diff --git a/gtk/src/auto/cell_renderer_spin.rs b/gtk/src/auto/cell_renderer_spin.rs
index 156ee5c9aa7c..1cf0f15a6dcd 100644
--- a/gtk/src/auto/cell_renderer_spin.rs
+++ b/gtk/src/auto/cell_renderer_spin.rs
@@ -324,7 +324,6 @@ impl CellRendererSpinBuilder {
             properties.push(("ypad", ypad));
         }
         glib::Object::new::<CellRendererSpin>(&properties)
-            .expect("Failed to create an instance of CellRendererSpin")
     }
 
     pub fn adjustment(mut self, adjustment: &impl IsA<Adjustment>) -> Self {
diff --git a/gtk/src/auto/cell_renderer_spinner.rs b/gtk/src/auto/cell_renderer_spinner.rs
index f1a25cfe9011..562fcf16be16 100644
--- a/gtk/src/auto/cell_renderer_spinner.rs
+++ b/gtk/src/auto/cell_renderer_spinner.rs
@@ -139,7 +139,6 @@ impl CellRendererSpinnerBuilder {
             properties.push(("ypad", ypad));
         }
         glib::Object::new::<CellRendererSpinner>(&properties)
-            .expect("Failed to create an instance of CellRendererSpinner")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/cell_renderer_text.rs b/gtk/src/auto/cell_renderer_text.rs
index 12b1d04c6d65..4bf9972255a5 100644
--- a/gtk/src/auto/cell_renderer_text.rs
+++ b/gtk/src/auto/cell_renderer_text.rs
@@ -311,7 +311,6 @@ impl CellRendererTextBuilder {
             properties.push(("ypad", ypad));
         }
         glib::Object::new::<CellRendererText>(&properties)
-            .expect("Failed to create an instance of CellRendererText")
     }
 
     pub fn align_set(mut self, align_set: bool) -> Self {
diff --git a/gtk/src/auto/cell_renderer_toggle.rs b/gtk/src/auto/cell_renderer_toggle.rs
index 6cb91a7b6b69..0bdaa091286e 100644
--- a/gtk/src/auto/cell_renderer_toggle.rs
+++ b/gtk/src/auto/cell_renderer_toggle.rs
@@ -147,7 +147,6 @@ impl CellRendererToggleBuilder {
             properties.push(("ypad", ypad));
         }
         glib::Object::new::<CellRendererToggle>(&properties)
-            .expect("Failed to create an instance of CellRendererToggle")
     }
 
     pub fn activatable(mut self, activatable: bool) -> Self {
diff --git a/gtk/src/auto/cell_view.rs b/gtk/src/auto/cell_view.rs
index 895729b19616..3588a9eeb2db 100644
--- a/gtk/src/auto/cell_view.rs
+++ b/gtk/src/auto/cell_view.rs
@@ -289,7 +289,6 @@ impl CellViewBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<CellView>(&properties)
-            .expect("Failed to create an instance of CellView")
     }
 
     pub fn background(mut self, background: &str) -> Self {
diff --git a/gtk/src/auto/check_button.rs b/gtk/src/auto/check_button.rs
index 2392be625ed0..24017e968d49 100644
--- a/gtk/src/auto/check_button.rs
+++ b/gtk/src/auto/check_button.rs
@@ -281,7 +281,6 @@ impl CheckButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<CheckButton>(&properties)
-            .expect("Failed to create an instance of CheckButton")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/check_menu_item.rs b/gtk/src/auto/check_menu_item.rs
index e6336d9a6072..5d09c94f2ff8 100644
--- a/gtk/src/auto/check_menu_item.rs
+++ b/gtk/src/auto/check_menu_item.rs
@@ -281,7 +281,6 @@ impl CheckMenuItemBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<CheckMenuItem>(&properties)
-            .expect("Failed to create an instance of CheckMenuItem")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/color_button.rs b/gtk/src/auto/color_button.rs
index 9b60d31764f6..3d6484cbb865 100644
--- a/gtk/src/auto/color_button.rs
+++ b/gtk/src/auto/color_button.rs
@@ -281,7 +281,6 @@ impl ColorButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<ColorButton>(&properties)
-            .expect("Failed to create an instance of ColorButton")
     }
 
     pub fn alpha(mut self, alpha: u32) -> Self {
diff --git a/gtk/src/auto/color_chooser_dialog.rs b/gtk/src/auto/color_chooser_dialog.rs
index 4ad848558295..982f36515018 100644
--- a/gtk/src/auto/color_chooser_dialog.rs
+++ b/gtk/src/auto/color_chooser_dialog.rs
@@ -61,7 +61,6 @@ impl ColorChooserDialog {
 impl Default for ColorChooserDialog {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct ColorChooserDialog object with default parameters")
     }
 }
 
@@ -355,7 +354,6 @@ impl ColorChooserDialogBuilder {
             properties.push(("use-alpha", use_alpha));
         }
         glib::Object::new::<ColorChooserDialog>(&properties)
-            .expect("Failed to create an instance of ColorChooserDialog")
     }
 
     pub fn show_editor(mut self, show_editor: bool) -> Self {
diff --git a/gtk/src/auto/color_chooser_widget.rs b/gtk/src/auto/color_chooser_widget.rs
index 9ff98787e0f3..68f6aaede2b5 100644
--- a/gtk/src/auto/color_chooser_widget.rs
+++ b/gtk/src/auto/color_chooser_widget.rs
@@ -246,7 +246,6 @@ impl ColorChooserWidgetBuilder {
             properties.push(("use-alpha", use_alpha));
         }
         glib::Object::new::<ColorChooserWidget>(&properties)
-            .expect("Failed to create an instance of ColorChooserWidget")
     }
 
     pub fn show_editor(mut self, show_editor: bool) -> Self {
diff --git a/gtk/src/auto/combo_box.rs b/gtk/src/auto/combo_box.rs
index 334a3ce4344c..2d181518f522 100644
--- a/gtk/src/auto/combo_box.rs
+++ b/gtk/src/auto/combo_box.rs
@@ -333,7 +333,6 @@ impl ComboBoxBuilder {
             properties.push(("editing-canceled", editing_canceled));
         }
         glib::Object::new::<ComboBox>(&properties)
-            .expect("Failed to create an instance of ComboBox")
     }
 
     pub fn active(mut self, active: i32) -> Self {
diff --git a/gtk/src/auto/combo_box_text.rs b/gtk/src/auto/combo_box_text.rs
index 61c5b2fb9697..4a2b35bc6091 100644
--- a/gtk/src/auto/combo_box_text.rs
+++ b/gtk/src/auto/combo_box_text.rs
@@ -279,7 +279,6 @@ impl ComboBoxTextBuilder {
             properties.push(("editing-canceled", editing_canceled));
         }
         glib::Object::new::<ComboBoxText>(&properties)
-            .expect("Failed to create an instance of ComboBoxText")
     }
 
     pub fn active(mut self, active: i32) -> Self {
diff --git a/gtk/src/auto/dialog.rs b/gtk/src/auto/dialog.rs
index ff4add514ff0..04411a8b2d71 100644
--- a/gtk/src/auto/dialog.rs
+++ b/gtk/src/auto/dialog.rs
@@ -343,7 +343,7 @@ impl DialogBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Dialog>(&properties).expect("Failed to create an instance of Dialog")
+        glib::Object::new::<Dialog>(&properties)
     }
 
     pub fn use_header_bar(mut self, use_header_bar: i32) -> Self {
diff --git a/gtk/src/auto/drawing_area.rs b/gtk/src/auto/drawing_area.rs
index 4f9f242c52b5..5ad5fcf21530 100644
--- a/gtk/src/auto/drawing_area.rs
+++ b/gtk/src/auto/drawing_area.rs
@@ -196,7 +196,6 @@ impl DrawingAreaBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<DrawingArea>(&properties)
-            .expect("Failed to create an instance of DrawingArea")
     }
 
     pub fn app_paintable(mut self, app_paintable: bool) -> Self {
diff --git a/gtk/src/auto/entry.rs b/gtk/src/auto/entry.rs
index 4714d346d207..3fe0bee3ec2e 100644
--- a/gtk/src/auto/entry.rs
+++ b/gtk/src/auto/entry.rs
@@ -396,7 +396,7 @@ impl EntryBuilder {
         if let Some(ref editing_canceled) = self.editing_canceled {
             properties.push(("editing-canceled", editing_canceled));
         }
-        glib::Object::new::<Entry>(&properties).expect("Failed to create an instance of Entry")
+        glib::Object::new::<Entry>(&properties)
     }
 
     pub fn activates_default(mut self, activates_default: bool) -> Self {
diff --git a/gtk/src/auto/entry_completion.rs b/gtk/src/auto/entry_completion.rs
index 2d3a5e060086..915acd891153 100644
--- a/gtk/src/auto/entry_completion.rs
+++ b/gtk/src/auto/entry_completion.rs
@@ -120,7 +120,6 @@ impl EntryCompletionBuilder {
             properties.push(("text-column", text_column));
         }
         glib::Object::new::<EntryCompletion>(&properties)
-            .expect("Failed to create an instance of EntryCompletion")
     }
 
     pub fn cell_area(mut self, cell_area: &impl IsA<CellArea>) -> Self {
diff --git a/gtk/src/auto/event_box.rs b/gtk/src/auto/event_box.rs
index ef4ddb75b991..75a879163ab1 100644
--- a/gtk/src/auto/event_box.rs
+++ b/gtk/src/auto/event_box.rs
@@ -222,7 +222,6 @@ impl EventBoxBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<EventBox>(&properties)
-            .expect("Failed to create an instance of EventBox")
     }
 
     pub fn above_child(mut self, above_child: bool) -> Self {
diff --git a/gtk/src/auto/expander.rs b/gtk/src/auto/expander.rs
index d88b2dd9f930..640e21056b86 100644
--- a/gtk/src/auto/expander.rs
+++ b/gtk/src/auto/expander.rs
@@ -62,7 +62,6 @@ impl Expander {
 impl Default for Expander {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Expander object with default parameters")
     }
 }
 
@@ -256,7 +255,6 @@ impl ExpanderBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<Expander>(&properties)
-            .expect("Failed to create an instance of Expander")
     }
 
     pub fn expanded(mut self, expanded: bool) -> Self {
diff --git a/gtk/src/auto/file_chooser_button.rs b/gtk/src/auto/file_chooser_button.rs
index 8e4818c0e7a9..d5241857125b 100644
--- a/gtk/src/auto/file_chooser_button.rs
+++ b/gtk/src/auto/file_chooser_button.rs
@@ -74,7 +74,6 @@ impl FileChooserButton {
 impl Default for FileChooserButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct FileChooserButton object with default parameters")
     }
 }
 
@@ -312,7 +311,6 @@ impl FileChooserButtonBuilder {
             properties.push(("use-preview-label", use_preview_label));
         }
         glib::Object::new::<FileChooserButton>(&properties)
-            .expect("Failed to create an instance of FileChooserButton")
     }
 
     pub fn dialog(mut self, dialog: &impl IsA<FileChooser>) -> Self {
diff --git a/gtk/src/auto/file_chooser_dialog.rs b/gtk/src/auto/file_chooser_dialog.rs
index f2d426ac2c41..a20ff525ab00 100644
--- a/gtk/src/auto/file_chooser_dialog.rs
+++ b/gtk/src/auto/file_chooser_dialog.rs
@@ -51,7 +51,6 @@ impl FileChooserDialog {
 impl Default for FileChooserDialog {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct FileChooserDialog object with default parameters")
     }
 }
 
@@ -377,7 +376,6 @@ impl FileChooserDialogBuilder {
             properties.push(("use-preview-label", use_preview_label));
         }
         glib::Object::new::<FileChooserDialog>(&properties)
-            .expect("Failed to create an instance of FileChooserDialog")
     }
 
     pub fn use_header_bar(mut self, use_header_bar: i32) -> Self {
diff --git a/gtk/src/auto/file_chooser_native.rs b/gtk/src/auto/file_chooser_native.rs
index 55427d60276f..2e2d0a09a954 100644
--- a/gtk/src/auto/file_chooser_native.rs
+++ b/gtk/src/auto/file_chooser_native.rs
@@ -148,7 +148,6 @@ impl FileChooserNative {
 impl Default for FileChooserNative {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct FileChooserNative object with default parameters")
     }
 }
 
@@ -242,7 +241,6 @@ impl FileChooserNativeBuilder {
             properties.push(("use-preview-label", use_preview_label));
         }
         glib::Object::new::<FileChooserNative>(&properties)
-            .expect("Failed to create an instance of FileChooserNative")
     }
 
     pub fn accept_label(mut self, accept_label: &str) -> Self {
diff --git a/gtk/src/auto/file_chooser_widget.rs b/gtk/src/auto/file_chooser_widget.rs
index c47a9d4f2331..cfba34bc5c7a 100644
--- a/gtk/src/auto/file_chooser_widget.rs
+++ b/gtk/src/auto/file_chooser_widget.rs
@@ -59,7 +59,6 @@ impl FileChooserWidget {
 impl Default for FileChooserWidget {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct FileChooserWidget object with default parameters")
     }
 }
 
@@ -289,7 +288,6 @@ impl FileChooserWidgetBuilder {
             properties.push(("use-preview-label", use_preview_label));
         }
         glib::Object::new::<FileChooserWidget>(&properties)
-            .expect("Failed to create an instance of FileChooserWidget")
     }
 
     pub fn search_mode(mut self, search_mode: bool) -> Self {
diff --git a/gtk/src/auto/fixed.rs b/gtk/src/auto/fixed.rs
index 83c702600e60..a7de91f55bc6 100644
--- a/gtk/src/auto/fixed.rs
+++ b/gtk/src/auto/fixed.rs
@@ -208,7 +208,7 @@ impl FixedBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Fixed>(&properties).expect("Failed to create an instance of Fixed")
+        glib::Object::new::<Fixed>(&properties)
     }
 
     pub fn border_width(mut self, border_width: u32) -> Self {
diff --git a/gtk/src/auto/flow_box.rs b/gtk/src/auto/flow_box.rs
index 89ddcbc5deb5..61d8a7d65676 100644
--- a/gtk/src/auto/flow_box.rs
+++ b/gtk/src/auto/flow_box.rs
@@ -251,7 +251,7 @@ impl FlowBoxBuilder {
         if let Some(ref orientation) = self.orientation {
             properties.push(("orientation", orientation));
         }
-        glib::Object::new::<FlowBox>(&properties).expect("Failed to create an instance of FlowBox")
+        glib::Object::new::<FlowBox>(&properties)
     }
 
     pub fn activate_on_single_click(mut self, activate_on_single_click: bool) -> Self {
diff --git a/gtk/src/auto/flow_box_child.rs b/gtk/src/auto/flow_box_child.rs
index 2de094dfff15..613cdec680c6 100644
--- a/gtk/src/auto/flow_box_child.rs
+++ b/gtk/src/auto/flow_box_child.rs
@@ -215,7 +215,6 @@ impl FlowBoxChildBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<FlowBoxChild>(&properties)
-            .expect("Failed to create an instance of FlowBoxChild")
     }
 
     pub fn border_width(mut self, border_width: u32) -> Self {
diff --git a/gtk/src/auto/font_button.rs b/gtk/src/auto/font_button.rs
index 1f9ba67b9918..83cce72e2e79 100644
--- a/gtk/src/auto/font_button.rs
+++ b/gtk/src/auto/font_button.rs
@@ -316,7 +316,6 @@ impl FontButtonBuilder {
             properties.push(("show-preview-entry", show_preview_entry));
         }
         glib::Object::new::<FontButton>(&properties)
-            .expect("Failed to create an instance of FontButton")
     }
 
     pub fn show_size(mut self, show_size: bool) -> Self {
diff --git a/gtk/src/auto/font_chooser_dialog.rs b/gtk/src/auto/font_chooser_dialog.rs
index ece8c72231bd..c7ca939caf9f 100644
--- a/gtk/src/auto/font_chooser_dialog.rs
+++ b/gtk/src/auto/font_chooser_dialog.rs
@@ -60,7 +60,6 @@ impl FontChooserDialog {
 impl Default for FontChooserDialog {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct FontChooserDialog object with default parameters")
     }
 }
 
@@ -372,7 +371,6 @@ impl FontChooserDialogBuilder {
             properties.push(("show-preview-entry", show_preview_entry));
         }
         glib::Object::new::<FontChooserDialog>(&properties)
-            .expect("Failed to create an instance of FontChooserDialog")
     }
 
     pub fn use_header_bar(mut self, use_header_bar: i32) -> Self {
diff --git a/gtk/src/auto/font_chooser_widget.rs b/gtk/src/auto/font_chooser_widget.rs
index 79fcb6af7409..1886ee797664 100644
--- a/gtk/src/auto/font_chooser_widget.rs
+++ b/gtk/src/auto/font_chooser_widget.rs
@@ -267,7 +267,6 @@ impl FontChooserWidgetBuilder {
             properties.push(("show-preview-entry", show_preview_entry));
         }
         glib::Object::new::<FontChooserWidget>(&properties)
-            .expect("Failed to create an instance of FontChooserWidget")
     }
 
     pub fn baseline_position(mut self, baseline_position: BaselinePosition) -> Self {
diff --git a/gtk/src/auto/frame.rs b/gtk/src/auto/frame.rs
index 360bc6c8ba3f..9091c1300000 100644
--- a/gtk/src/auto/frame.rs
+++ b/gtk/src/auto/frame.rs
@@ -51,7 +51,6 @@ impl Frame {
 impl Default for Frame {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Frame object with default parameters")
     }
 }
 
@@ -236,7 +235,7 @@ impl FrameBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Frame>(&properties).expect("Failed to create an instance of Frame")
+        glib::Object::new::<Frame>(&properties)
     }
 
     pub fn label(mut self, label: &str) -> Self {
diff --git a/gtk/src/auto/gesture_drag.rs b/gtk/src/auto/gesture_drag.rs
index eddcc3d8dcde..871026972e3b 100644
--- a/gtk/src/auto/gesture_drag.rs
+++ b/gtk/src/auto/gesture_drag.rs
@@ -52,7 +52,6 @@ impl GestureDrag {
 impl Default for GestureDrag {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct GestureDrag object with default parameters")
     }
 }
 
@@ -106,7 +105,6 @@ impl GestureDragBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<GestureDrag>(&properties)
-            .expect("Failed to create an instance of GestureDrag")
     }
 
     pub fn button(mut self, button: u32) -> Self {
diff --git a/gtk/src/auto/gesture_long_press.rs b/gtk/src/auto/gesture_long_press.rs
index 294e24b11804..d0eb7afdf4ac 100644
--- a/gtk/src/auto/gesture_long_press.rs
+++ b/gtk/src/auto/gesture_long_press.rs
@@ -131,7 +131,6 @@ impl GestureLongPress {
 impl Default for GestureLongPress {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct GestureLongPress object with default parameters")
     }
 }
 
@@ -189,7 +188,6 @@ impl GestureLongPressBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<GestureLongPress>(&properties)
-            .expect("Failed to create an instance of GestureLongPress")
     }
 
     pub fn delay_factor(mut self, delay_factor: f64) -> Self {
diff --git a/gtk/src/auto/gesture_multi_press.rs b/gtk/src/auto/gesture_multi_press.rs
index 4111b59e7fb1..78494c610ee2 100644
--- a/gtk/src/auto/gesture_multi_press.rs
+++ b/gtk/src/auto/gesture_multi_press.rs
@@ -152,7 +152,6 @@ impl GestureMultiPress {
 impl Default for GestureMultiPress {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct GestureMultiPress object with default parameters")
     }
 }
 
@@ -206,7 +205,6 @@ impl GestureMultiPressBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<GestureMultiPress>(&properties)
-            .expect("Failed to create an instance of GestureMultiPress")
     }
 
     pub fn button(mut self, button: u32) -> Self {
diff --git a/gtk/src/auto/gesture_pan.rs b/gtk/src/auto/gesture_pan.rs
index 1907cc96b892..c28bc0b28e9c 100644
--- a/gtk/src/auto/gesture_pan.rs
+++ b/gtk/src/auto/gesture_pan.rs
@@ -116,7 +116,6 @@ impl GesturePan {
 impl Default for GesturePan {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct GesturePan object with default parameters")
     }
 }
 
@@ -174,7 +173,6 @@ impl GesturePanBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<GesturePan>(&properties)
-            .expect("Failed to create an instance of GesturePan")
     }
 
     pub fn orientation(mut self, orientation: Orientation) -> Self {
diff --git a/gtk/src/auto/gesture_rotate.rs b/gtk/src/auto/gesture_rotate.rs
index e53da31fb6d7..ce839f27f750 100644
--- a/gtk/src/auto/gesture_rotate.rs
+++ b/gtk/src/auto/gesture_rotate.rs
@@ -81,7 +81,6 @@ impl GestureRotate {
 impl Default for GestureRotate {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct GestureRotate object with default parameters")
     }
 }
 
@@ -123,7 +122,6 @@ impl GestureRotateBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<GestureRotate>(&properties)
-            .expect("Failed to create an instance of GestureRotate")
     }
 
     pub fn n_points(mut self, n_points: u32) -> Self {
diff --git a/gtk/src/auto/gesture_swipe.rs b/gtk/src/auto/gesture_swipe.rs
index f6493cb6dff4..b3fa75669c3c 100644
--- a/gtk/src/auto/gesture_swipe.rs
+++ b/gtk/src/auto/gesture_swipe.rs
@@ -94,7 +94,6 @@ impl GestureSwipe {
 impl Default for GestureSwipe {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct GestureSwipe object with default parameters")
     }
 }
 
@@ -148,7 +147,6 @@ impl GestureSwipeBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<GestureSwipe>(&properties)
-            .expect("Failed to create an instance of GestureSwipe")
     }
 
     pub fn button(mut self, button: u32) -> Self {
diff --git a/gtk/src/auto/gesture_zoom.rs b/gtk/src/auto/gesture_zoom.rs
index b17fd9cebe40..6516bcc5a2fc 100644
--- a/gtk/src/auto/gesture_zoom.rs
+++ b/gtk/src/auto/gesture_zoom.rs
@@ -78,7 +78,6 @@ impl GestureZoom {
 impl Default for GestureZoom {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct GestureZoom object with default parameters")
     }
 }
 
@@ -120,7 +119,6 @@ impl GestureZoomBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<GestureZoom>(&properties)
-            .expect("Failed to create an instance of GestureZoom")
     }
 
     pub fn n_points(mut self, n_points: u32) -> Self {
diff --git a/gtk/src/auto/gl_area.rs b/gtk/src/auto/gl_area.rs
index 6846fac30272..2837ac04310f 100644
--- a/gtk/src/auto/gl_area.rs
+++ b/gtk/src/auto/gl_area.rs
@@ -220,7 +220,7 @@ impl GLAreaBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<GLArea>(&properties).expect("Failed to create an instance of GLArea")
+        glib::Object::new::<GLArea>(&properties)
     }
 
     pub fn auto_render(mut self, auto_render: bool) -> Self {
diff --git a/gtk/src/auto/grid.rs b/gtk/src/auto/grid.rs
index f92cb9909626..07a0e689cdd5 100644
--- a/gtk/src/auto/grid.rs
+++ b/gtk/src/auto/grid.rs
@@ -240,7 +240,7 @@ impl GridBuilder {
         if let Some(ref orientation) = self.orientation {
             properties.push(("orientation", orientation));
         }
-        glib::Object::new::<Grid>(&properties).expect("Failed to create an instance of Grid")
+        glib::Object::new::<Grid>(&properties)
     }
 
     pub fn baseline_row(mut self, baseline_row: i32) -> Self {
diff --git a/gtk/src/auto/header_bar.rs b/gtk/src/auto/header_bar.rs
index 3515c83ee4cd..cbc43650cdfc 100644
--- a/gtk/src/auto/header_bar.rs
+++ b/gtk/src/auto/header_bar.rs
@@ -246,7 +246,6 @@ impl HeaderBarBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<HeaderBar>(&properties)
-            .expect("Failed to create an instance of HeaderBar")
     }
 
     pub fn custom_title(mut self, custom_title: &impl IsA<Widget>) -> Self {
diff --git a/gtk/src/auto/header_bar_accessible.rs b/gtk/src/auto/header_bar_accessible.rs
index 49882533a73b..72baacacf33e 100644
--- a/gtk/src/auto/header_bar_accessible.rs
+++ b/gtk/src/auto/header_bar_accessible.rs
@@ -113,7 +113,6 @@ impl HeaderBarAccessibleBuilder {
             properties.push(("accessible-value", accessible_value));
         }
         glib::Object::new::<HeaderBarAccessible>(&properties)
-            .expect("Failed to create an instance of HeaderBarAccessible")
     }
 
     pub fn accessible_description(mut self, accessible_description: &str) -> Self {
diff --git a/gtk/src/auto/icon_view.rs b/gtk/src/auto/icon_view.rs
index 61e570a913ca..56d30b3aff4d 100644
--- a/gtk/src/auto/icon_view.rs
+++ b/gtk/src/auto/icon_view.rs
@@ -334,7 +334,6 @@ impl IconViewBuilder {
             properties.push(("vscroll-policy", vscroll_policy));
         }
         glib::Object::new::<IconView>(&properties)
-            .expect("Failed to create an instance of IconView")
     }
 
     pub fn activate_on_single_click(mut self, activate_on_single_click: bool) -> Self {
diff --git a/gtk/src/auto/im_context_simple.rs b/gtk/src/auto/im_context_simple.rs
index 96188cea0e3a..11b976c25196 100644
--- a/gtk/src/auto/im_context_simple.rs
+++ b/gtk/src/auto/im_context_simple.rs
@@ -74,7 +74,6 @@ impl IMContextSimpleBuilder {
             properties.push(("input-purpose", input_purpose));
         }
         glib::Object::new::<IMContextSimple>(&properties)
-            .expect("Failed to create an instance of IMContextSimple")
     }
 
     pub fn input_hints(mut self, input_hints: InputHints) -> Self {
diff --git a/gtk/src/auto/im_multicontext.rs b/gtk/src/auto/im_multicontext.rs
index c98b0a53c951..f24c5ccd0776 100644
--- a/gtk/src/auto/im_multicontext.rs
+++ b/gtk/src/auto/im_multicontext.rs
@@ -75,7 +75,6 @@ impl IMMulticontextBuilder {
             properties.push(("input-purpose", input_purpose));
         }
         glib::Object::new::<IMMulticontext>(&properties)
-            .expect("Failed to create an instance of IMMulticontext")
     }
 
     pub fn input_hints(mut self, input_hints: InputHints) -> Self {
diff --git a/gtk/src/auto/info_bar.rs b/gtk/src/auto/info_bar.rs
index a5b5aaafe37d..ad9a2cd67281 100644
--- a/gtk/src/auto/info_bar.rs
+++ b/gtk/src/auto/info_bar.rs
@@ -254,7 +254,7 @@ impl InfoBarBuilder {
         if let Some(ref orientation) = self.orientation {
             properties.push(("orientation", orientation));
         }
-        glib::Object::new::<InfoBar>(&properties).expect("Failed to create an instance of InfoBar")
+        glib::Object::new::<InfoBar>(&properties)
     }
 
     pub fn message_type(mut self, message_type: MessageType) -> Self {
diff --git a/gtk/src/auto/invisible.rs b/gtk/src/auto/invisible.rs
index 4aa1508ffb95..5d1fa7969f61 100644
--- a/gtk/src/auto/invisible.rs
+++ b/gtk/src/auto/invisible.rs
@@ -214,7 +214,6 @@ impl InvisibleBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<Invisible>(&properties)
-            .expect("Failed to create an instance of Invisible")
     }
 
     pub fn screen(mut self, screen: &gdk::Screen) -> Self {
diff --git a/gtk/src/auto/label.rs b/gtk/src/auto/label.rs
index e50b1a22f4d2..593b14949929 100644
--- a/gtk/src/auto/label.rs
+++ b/gtk/src/auto/label.rs
@@ -63,7 +63,6 @@ impl Label {
 impl Default for Label {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Label object with default parameters")
     }
 }
 
@@ -292,7 +291,7 @@ impl LabelBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Label>(&properties).expect("Failed to create an instance of Label")
+        glib::Object::new::<Label>(&properties)
     }
 
     pub fn angle(mut self, angle: f64) -> Self {
diff --git a/gtk/src/auto/layout.rs b/gtk/src/auto/layout.rs
index 3ba396a53084..4a4c841defce 100644
--- a/gtk/src/auto/layout.rs
+++ b/gtk/src/auto/layout.rs
@@ -61,7 +61,6 @@ impl Layout {
 impl Default for Layout {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Layout object with default parameters")
     }
 }
 
@@ -250,7 +249,7 @@ impl LayoutBuilder {
         if let Some(ref vscroll_policy) = self.vscroll_policy {
             properties.push(("vscroll-policy", vscroll_policy));
         }
-        glib::Object::new::<Layout>(&properties).expect("Failed to create an instance of Layout")
+        glib::Object::new::<Layout>(&properties)
     }
 
     pub fn height(mut self, height: u32) -> Self {
diff --git a/gtk/src/auto/level_bar.rs b/gtk/src/auto/level_bar.rs
index 43571d877db3..8150f3d2af2a 100644
--- a/gtk/src/auto/level_bar.rs
+++ b/gtk/src/auto/level_bar.rs
@@ -238,7 +238,6 @@ impl LevelBarBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<LevelBar>(&properties)
-            .expect("Failed to create an instance of LevelBar")
     }
 
     pub fn inverted(mut self, inverted: bool) -> Self {
diff --git a/gtk/src/auto/link_button.rs b/gtk/src/auto/link_button.rs
index 1cbd224f10f0..036bf50b0a6a 100644
--- a/gtk/src/auto/link_button.rs
+++ b/gtk/src/auto/link_button.rs
@@ -68,7 +68,6 @@ impl LinkButton {
 impl Default for LinkButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct LinkButton object with default parameters")
     }
 }
 
@@ -274,7 +273,6 @@ impl LinkButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<LinkButton>(&properties)
-            .expect("Failed to create an instance of LinkButton")
     }
 
     pub fn uri(mut self, uri: &str) -> Self {
diff --git a/gtk/src/auto/list_box.rs b/gtk/src/auto/list_box.rs
index 517103a99106..3e379fe0c4a6 100644
--- a/gtk/src/auto/list_box.rs
+++ b/gtk/src/auto/list_box.rs
@@ -225,7 +225,7 @@ impl ListBoxBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<ListBox>(&properties).expect("Failed to create an instance of ListBox")
+        glib::Object::new::<ListBox>(&properties)
     }
 
     pub fn activate_on_single_click(mut self, activate_on_single_click: bool) -> Self {
diff --git a/gtk/src/auto/list_box_row.rs b/gtk/src/auto/list_box_row.rs
index 802883929a42..2de7b5ee9f19 100644
--- a/gtk/src/auto/list_box_row.rs
+++ b/gtk/src/auto/list_box_row.rs
@@ -232,7 +232,6 @@ impl ListBoxRowBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<ListBoxRow>(&properties)
-            .expect("Failed to create an instance of ListBoxRow")
     }
 
     pub fn activatable(mut self, activatable: bool) -> Self {
diff --git a/gtk/src/auto/lock_button.rs b/gtk/src/auto/lock_button.rs
index 35ec25b29030..65953292dc2a 100644
--- a/gtk/src/auto/lock_button.rs
+++ b/gtk/src/auto/lock_button.rs
@@ -58,7 +58,6 @@ impl LockButton {
 impl Default for LockButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct LockButton object with default parameters")
     }
 }
 
@@ -280,7 +279,6 @@ impl LockButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<LockButton>(&properties)
-            .expect("Failed to create an instance of LockButton")
     }
 
     pub fn permission(mut self, permission: &impl IsA<gio::Permission>) -> Self {
diff --git a/gtk/src/auto/menu.rs b/gtk/src/auto/menu.rs
index 9b9bf82f27ed..969bb2feb7f8 100644
--- a/gtk/src/auto/menu.rs
+++ b/gtk/src/auto/menu.rs
@@ -284,7 +284,7 @@ impl MenuBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Menu>(&properties).expect("Failed to create an instance of Menu")
+        glib::Object::new::<Menu>(&properties)
     }
 
     pub fn accel_group(mut self, accel_group: &impl IsA<AccelGroup>) -> Self {
diff --git a/gtk/src/auto/menu_bar.rs b/gtk/src/auto/menu_bar.rs
index e62f89664f13..eabd1d1a309f 100644
--- a/gtk/src/auto/menu_bar.rs
+++ b/gtk/src/auto/menu_bar.rs
@@ -238,7 +238,7 @@ impl MenuBarBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<MenuBar>(&properties).expect("Failed to create an instance of MenuBar")
+        glib::Object::new::<MenuBar>(&properties)
     }
 
     pub fn child_pack_direction(mut self, child_pack_direction: PackDirection) -> Self {
diff --git a/gtk/src/auto/menu_button.rs b/gtk/src/auto/menu_button.rs
index dadb2d1150cb..f814dca0bea9 100644
--- a/gtk/src/auto/menu_button.rs
+++ b/gtk/src/auto/menu_button.rs
@@ -290,7 +290,6 @@ impl MenuButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<MenuButton>(&properties)
-            .expect("Failed to create an instance of MenuButton")
     }
 
     pub fn align_widget(mut self, align_widget: &impl IsA<Container>) -> Self {
diff --git a/gtk/src/auto/menu_item.rs b/gtk/src/auto/menu_item.rs
index ebbcb845ab6a..82f9ee066b9c 100644
--- a/gtk/src/auto/menu_item.rs
+++ b/gtk/src/auto/menu_item.rs
@@ -265,7 +265,6 @@ impl MenuItemBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<MenuItem>(&properties)
-            .expect("Failed to create an instance of MenuItem")
     }
 
     pub fn accel_path(mut self, accel_path: &str) -> Self {
diff --git a/gtk/src/auto/menu_tool_button.rs b/gtk/src/auto/menu_tool_button.rs
index d3615c793535..892809cdc8e6 100644
--- a/gtk/src/auto/menu_tool_button.rs
+++ b/gtk/src/auto/menu_tool_button.rs
@@ -59,7 +59,6 @@ impl MenuToolButton {
 impl Default for MenuToolButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct MenuToolButton object with default parameters")
     }
 }
 
@@ -269,7 +268,6 @@ impl MenuToolButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<MenuToolButton>(&properties)
-            .expect("Failed to create an instance of MenuToolButton")
     }
 
     pub fn menu(mut self, menu: &impl IsA<Menu>) -> Self {
diff --git a/gtk/src/auto/message_dialog.rs b/gtk/src/auto/message_dialog.rs
index c6aecba1d4a7..dc7eb521eb2b 100644
--- a/gtk/src/auto/message_dialog.rs
+++ b/gtk/src/auto/message_dialog.rs
@@ -61,7 +61,6 @@ impl MessageDialog {
 impl Default for MessageDialog {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct MessageDialog object with default parameters")
     }
 }
 
@@ -367,7 +366,6 @@ impl MessageDialogBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<MessageDialog>(&properties)
-            .expect("Failed to create an instance of MessageDialog")
     }
 
     pub fn buttons(mut self, buttons: ButtonsType) -> Self {
diff --git a/gtk/src/auto/model_button.rs b/gtk/src/auto/model_button.rs
index ebe5c3d360d3..793660485877 100644
--- a/gtk/src/auto/model_button.rs
+++ b/gtk/src/auto/model_button.rs
@@ -578,7 +578,6 @@ impl ModelButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<ModelButton>(&properties)
-            .expect("Failed to create an instance of ModelButton")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/mount_operation.rs b/gtk/src/auto/mount_operation.rs
index 559c91fcb8b3..81e111b3c125 100644
--- a/gtk/src/auto/mount_operation.rs
+++ b/gtk/src/auto/mount_operation.rs
@@ -49,7 +49,6 @@ impl MountOperation {
 impl Default for MountOperation {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct MountOperation object with default parameters")
     }
 }
 
@@ -125,7 +124,6 @@ impl MountOperationBuilder {
             properties.push(("username", username));
         }
         glib::Object::new::<MountOperation>(&properties)
-            .expect("Failed to create an instance of MountOperation")
     }
 
     pub fn parent(mut self, parent: &impl IsA<Window>) -> Self {
diff --git a/gtk/src/auto/notebook.rs b/gtk/src/auto/notebook.rs
index c68ffd69a5bd..c60e0d2afefb 100644
--- a/gtk/src/auto/notebook.rs
+++ b/gtk/src/auto/notebook.rs
@@ -246,7 +246,6 @@ impl NotebookBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<Notebook>(&properties)
-            .expect("Failed to create an instance of Notebook")
     }
 
     pub fn enable_popup(mut self, enable_popup: bool) -> Self {
diff --git a/gtk/src/auto/offscreen_window.rs b/gtk/src/auto/offscreen_window.rs
index abac35cbc228..b7ab2f0bd83d 100644
--- a/gtk/src/auto/offscreen_window.rs
+++ b/gtk/src/auto/offscreen_window.rs
@@ -326,7 +326,6 @@ impl OffscreenWindowBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<OffscreenWindow>(&properties)
-            .expect("Failed to create an instance of OffscreenWindow")
     }
 
     pub fn accept_focus(mut self, accept_focus: bool) -> Self {
diff --git a/gtk/src/auto/overlay.rs b/gtk/src/auto/overlay.rs
index 588dabde966e..6230a8521162 100644
--- a/gtk/src/auto/overlay.rs
+++ b/gtk/src/auto/overlay.rs
@@ -209,7 +209,7 @@ impl OverlayBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Overlay>(&properties).expect("Failed to create an instance of Overlay")
+        glib::Object::new::<Overlay>(&properties)
     }
 
     pub fn border_width(mut self, border_width: u32) -> Self {
diff --git a/gtk/src/auto/pad_controller.rs b/gtk/src/auto/pad_controller.rs
index 08dee8bac9fd..5e428eb7181f 100644
--- a/gtk/src/auto/pad_controller.rs
+++ b/gtk/src/auto/pad_controller.rs
@@ -83,7 +83,6 @@ impl PadController {
 impl Default for PadController {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct PadController object with default parameters")
     }
 }
 
@@ -125,7 +124,6 @@ impl PadControllerBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<PadController>(&properties)
-            .expect("Failed to create an instance of PadController")
     }
 
     pub fn action_group(mut self, action_group: &impl IsA<gio::ActionGroup>) -> Self {
diff --git a/gtk/src/auto/paned.rs b/gtk/src/auto/paned.rs
index 9ad48ff550fa..fb03d70b7d40 100644
--- a/gtk/src/auto/paned.rs
+++ b/gtk/src/auto/paned.rs
@@ -52,7 +52,6 @@ impl Paned {
 impl Default for Paned {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Paned object with default parameters")
     }
 }
 
@@ -233,7 +232,7 @@ impl PanedBuilder {
         if let Some(ref orientation) = self.orientation {
             properties.push(("orientation", orientation));
         }
-        glib::Object::new::<Paned>(&properties).expect("Failed to create an instance of Paned")
+        glib::Object::new::<Paned>(&properties)
     }
 
     pub fn position(mut self, position: i32) -> Self {
diff --git a/gtk/src/auto/places_sidebar.rs b/gtk/src/auto/places_sidebar.rs
index d62501f3baf6..2856bf98b758 100644
--- a/gtk/src/auto/places_sidebar.rs
+++ b/gtk/src/auto/places_sidebar.rs
@@ -1060,7 +1060,6 @@ impl PlacesSidebarBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<PlacesSidebar>(&properties)
-            .expect("Failed to create an instance of PlacesSidebar")
     }
 
     pub fn local_only(mut self, local_only: bool) -> Self {
diff --git a/gtk/src/auto/plug.rs b/gtk/src/auto/plug.rs
index 606f42aa047d..d2d1e5e61d77 100644
--- a/gtk/src/auto/plug.rs
+++ b/gtk/src/auto/plug.rs
@@ -67,7 +67,6 @@ impl Plug {
 impl Default for Plug {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Plug object with default parameters")
     }
 }
 
@@ -344,7 +343,7 @@ impl PlugBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Plug>(&properties).expect("Failed to create an instance of Plug")
+        glib::Object::new::<Plug>(&properties)
     }
 
     pub fn accept_focus(mut self, accept_focus: bool) -> Self {
diff --git a/gtk/src/auto/plug_accessible.rs b/gtk/src/auto/plug_accessible.rs
index 4e8e23d7ac7f..b4c419114e24 100644
--- a/gtk/src/auto/plug_accessible.rs
+++ b/gtk/src/auto/plug_accessible.rs
@@ -114,7 +114,6 @@ impl PlugAccessibleBuilder {
             properties.push(("accessible-value", accessible_value));
         }
         glib::Object::new::<PlugAccessible>(&properties)
-            .expect("Failed to create an instance of PlugAccessible")
     }
 
     pub fn accessible_description(mut self, accessible_description: &str) -> Self {
diff --git a/gtk/src/auto/popover.rs b/gtk/src/auto/popover.rs
index 089ac0029693..adbdbd6e0c86 100644
--- a/gtk/src/auto/popover.rs
+++ b/gtk/src/auto/popover.rs
@@ -72,7 +72,6 @@ impl Popover {
 impl Default for Popover {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Popover object with default parameters")
     }
 }
 
@@ -257,7 +256,7 @@ impl PopoverBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Popover>(&properties).expect("Failed to create an instance of Popover")
+        glib::Object::new::<Popover>(&properties)
     }
 
     pub fn constrain_to(mut self, constrain_to: PopoverConstraint) -> Self {
diff --git a/gtk/src/auto/popover_menu.rs b/gtk/src/auto/popover_menu.rs
index ccaec1b3a94f..94f60d3e9c9e 100644
--- a/gtk/src/auto/popover_menu.rs
+++ b/gtk/src/auto/popover_menu.rs
@@ -306,7 +306,6 @@ impl PopoverMenuBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<PopoverMenu>(&properties)
-            .expect("Failed to create an instance of PopoverMenu")
     }
 
     pub fn visible_submenu(mut self, visible_submenu: &str) -> Self {
diff --git a/gtk/src/auto/print_operation.rs b/gtk/src/auto/print_operation.rs
index a8d888a4516a..573a1da7594a 100644
--- a/gtk/src/auto/print_operation.rs
+++ b/gtk/src/auto/print_operation.rs
@@ -139,7 +139,6 @@ impl PrintOperationBuilder {
             properties.push(("use-full-page", use_full_page));
         }
         glib::Object::new::<PrintOperation>(&properties)
-            .expect("Failed to create an instance of PrintOperation")
     }
 
     pub fn allow_async(mut self, allow_async: bool) -> Self {
diff --git a/gtk/src/auto/progress_bar.rs b/gtk/src/auto/progress_bar.rs
index c07f982ec9e6..3cff706ced7c 100644
--- a/gtk/src/auto/progress_bar.rs
+++ b/gtk/src/auto/progress_bar.rs
@@ -230,7 +230,6 @@ impl ProgressBarBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<ProgressBar>(&properties)
-            .expect("Failed to create an instance of ProgressBar")
     }
 
     pub fn ellipsize(mut self, ellipsize: pango::EllipsizeMode) -> Self {
diff --git a/gtk/src/auto/radio_button.rs b/gtk/src/auto/radio_button.rs
index 76b7a7f72816..d0620a8ab565 100644
--- a/gtk/src/auto/radio_button.rs
+++ b/gtk/src/auto/radio_button.rs
@@ -296,7 +296,6 @@ impl RadioButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<RadioButton>(&properties)
-            .expect("Failed to create an instance of RadioButton")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/radio_menu_item.rs b/gtk/src/auto/radio_menu_item.rs
index 4d2920a6cb42..b833019114b4 100644
--- a/gtk/src/auto/radio_menu_item.rs
+++ b/gtk/src/auto/radio_menu_item.rs
@@ -290,7 +290,6 @@ impl RadioMenuItemBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<RadioMenuItem>(&properties)
-            .expect("Failed to create an instance of RadioMenuItem")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/radio_tool_button.rs b/gtk/src/auto/radio_tool_button.rs
index 9d1e5a474598..469be0b47e77 100644
--- a/gtk/src/auto/radio_tool_button.rs
+++ b/gtk/src/auto/radio_tool_button.rs
@@ -259,7 +259,6 @@ impl RadioToolButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<RadioToolButton>(&properties)
-            .expect("Failed to create an instance of RadioToolButton")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/recent_chooser_dialog.rs b/gtk/src/auto/recent_chooser_dialog.rs
index 9877f2726465..0588d6de61c9 100644
--- a/gtk/src/auto/recent_chooser_dialog.rs
+++ b/gtk/src/auto/recent_chooser_dialog.rs
@@ -58,7 +58,6 @@ impl RecentChooserDialog {
 impl Default for RecentChooserDialog {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct RecentChooserDialog object with default parameters")
     }
 }
 
@@ -380,7 +379,6 @@ impl RecentChooserDialogBuilder {
             properties.push(("sort-type", sort_type));
         }
         glib::Object::new::<RecentChooserDialog>(&properties)
-            .expect("Failed to create an instance of RecentChooserDialog")
     }
 
     pub fn use_header_bar(mut self, use_header_bar: i32) -> Self {
diff --git a/gtk/src/auto/recent_chooser_menu.rs b/gtk/src/auto/recent_chooser_menu.rs
index bb9bd70d050a..43ee03692d51 100644
--- a/gtk/src/auto/recent_chooser_menu.rs
+++ b/gtk/src/auto/recent_chooser_menu.rs
@@ -320,7 +320,6 @@ impl RecentChooserMenuBuilder {
             properties.push(("sort-type", sort_type));
         }
         glib::Object::new::<RecentChooserMenu>(&properties)
-            .expect("Failed to create an instance of RecentChooserMenu")
     }
 
     pub fn show_numbers(mut self, show_numbers: bool) -> Self {
diff --git a/gtk/src/auto/recent_chooser_widget.rs b/gtk/src/auto/recent_chooser_widget.rs
index 6a18b7d96bec..f953bc698fe0 100644
--- a/gtk/src/auto/recent_chooser_widget.rs
+++ b/gtk/src/auto/recent_chooser_widget.rs
@@ -285,7 +285,6 @@ impl RecentChooserWidgetBuilder {
             properties.push(("sort-type", sort_type));
         }
         glib::Object::new::<RecentChooserWidget>(&properties)
-            .expect("Failed to create an instance of RecentChooserWidget")
     }
 
     pub fn baseline_position(mut self, baseline_position: BaselinePosition) -> Self {
diff --git a/gtk/src/auto/recent_manager.rs b/gtk/src/auto/recent_manager.rs
index f367bad96e65..3e7b9fe2563b 100644
--- a/gtk/src/auto/recent_manager.rs
+++ b/gtk/src/auto/recent_manager.rs
@@ -82,7 +82,6 @@ impl RecentManagerBuilder {
             properties.push(("filename", filename));
         }
         glib::Object::new::<RecentManager>(&properties)
-            .expect("Failed to create an instance of RecentManager")
     }
 
     pub fn filename(mut self, filename: &str) -> Self {
diff --git a/gtk/src/auto/revealer.rs b/gtk/src/auto/revealer.rs
index 1e9609f28594..c4d37c6cd6e3 100644
--- a/gtk/src/auto/revealer.rs
+++ b/gtk/src/auto/revealer.rs
@@ -227,7 +227,6 @@ impl RevealerBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<Revealer>(&properties)
-            .expect("Failed to create an instance of Revealer")
     }
 
     pub fn reveal_child(mut self, reveal_child: bool) -> Self {
diff --git a/gtk/src/auto/scale.rs b/gtk/src/auto/scale.rs
index dca0564ebe4c..b6ffc750a307 100644
--- a/gtk/src/auto/scale.rs
+++ b/gtk/src/auto/scale.rs
@@ -75,7 +75,6 @@ impl Scale {
 impl Default for Scale {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Scale object with default parameters")
     }
 }
 
@@ -280,7 +279,7 @@ impl ScaleBuilder {
         if let Some(ref orientation) = self.orientation {
             properties.push(("orientation", orientation));
         }
-        glib::Object::new::<Scale>(&properties).expect("Failed to create an instance of Scale")
+        glib::Object::new::<Scale>(&properties)
     }
 
     pub fn digits(mut self, digits: i32) -> Self {
diff --git a/gtk/src/auto/scale_button.rs b/gtk/src/auto/scale_button.rs
index 8fd21bc847d7..5117bfb08e21 100644
--- a/gtk/src/auto/scale_button.rs
+++ b/gtk/src/auto/scale_button.rs
@@ -67,7 +67,6 @@ impl ScaleButton {
 impl Default for ScaleButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct ScaleButton object with default parameters")
     }
 }
 
@@ -285,7 +284,6 @@ impl ScaleButtonBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<ScaleButton>(&properties)
-            .expect("Failed to create an instance of ScaleButton")
     }
 
     pub fn adjustment(mut self, adjustment: &impl IsA<Adjustment>) -> Self {
diff --git a/gtk/src/auto/scrollbar.rs b/gtk/src/auto/scrollbar.rs
index 64290ed32ab6..8a64d852a452 100644
--- a/gtk/src/auto/scrollbar.rs
+++ b/gtk/src/auto/scrollbar.rs
@@ -54,7 +54,6 @@ impl Scrollbar {
 impl Default for Scrollbar {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Scrollbar object with default parameters")
     }
 }
 
@@ -244,7 +243,6 @@ impl ScrollbarBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<Scrollbar>(&properties)
-            .expect("Failed to create an instance of Scrollbar")
     }
 
     pub fn adjustment(mut self, adjustment: &impl IsA<Adjustment>) -> Self {
diff --git a/gtk/src/auto/scrolled_window.rs b/gtk/src/auto/scrolled_window.rs
index bd23609b4c48..216951c7b742 100644
--- a/gtk/src/auto/scrolled_window.rs
+++ b/gtk/src/auto/scrolled_window.rs
@@ -67,7 +67,6 @@ impl ScrolledWindow {
 impl Default for ScrolledWindow {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct ScrolledWindow object with default parameters")
     }
 }
 
@@ -289,7 +288,6 @@ impl ScrolledWindowBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<ScrolledWindow>(&properties)
-            .expect("Failed to create an instance of ScrolledWindow")
     }
 
     pub fn hadjustment(mut self, hadjustment: &impl IsA<Adjustment>) -> Self {
diff --git a/gtk/src/auto/search_bar.rs b/gtk/src/auto/search_bar.rs
index db866206fda2..6aab320afb21 100644
--- a/gtk/src/auto/search_bar.rs
+++ b/gtk/src/auto/search_bar.rs
@@ -223,7 +223,6 @@ impl SearchBarBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<SearchBar>(&properties)
-            .expect("Failed to create an instance of SearchBar")
     }
 
     pub fn search_mode_enabled(mut self, search_mode_enabled: bool) -> Self {
diff --git a/gtk/src/auto/search_entry.rs b/gtk/src/auto/search_entry.rs
index 425db8368d2b..3c7b886891db 100644
--- a/gtk/src/auto/search_entry.rs
+++ b/gtk/src/auto/search_entry.rs
@@ -379,7 +379,6 @@ impl SearchEntryBuilder {
             properties.push(("editing-canceled", editing_canceled));
         }
         glib::Object::new::<SearchEntry>(&properties)
-            .expect("Failed to create an instance of SearchEntry")
     }
 
     pub fn activates_default(mut self, activates_default: bool) -> Self {
diff --git a/gtk/src/auto/separator.rs b/gtk/src/auto/separator.rs
index e51a53fa45b8..368b9dc9bd19 100644
--- a/gtk/src/auto/separator.rs
+++ b/gtk/src/auto/separator.rs
@@ -47,7 +47,6 @@ impl Separator {
 impl Default for Separator {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Separator object with default parameters")
     }
 }
 
@@ -205,7 +204,6 @@ impl SeparatorBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<Separator>(&properties)
-            .expect("Failed to create an instance of Separator")
     }
 
     pub fn app_paintable(mut self, app_paintable: bool) -> Self {
diff --git a/gtk/src/auto/separator_menu_item.rs b/gtk/src/auto/separator_menu_item.rs
index 96f825f7ed6d..dc80e27addf5 100644
--- a/gtk/src/auto/separator_menu_item.rs
+++ b/gtk/src/auto/separator_menu_item.rs
@@ -241,7 +241,6 @@ impl SeparatorMenuItemBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<SeparatorMenuItem>(&properties)
-            .expect("Failed to create an instance of SeparatorMenuItem")
     }
 
     pub fn accel_path(mut self, accel_path: &str) -> Self {
diff --git a/gtk/src/auto/separator_tool_item.rs b/gtk/src/auto/separator_tool_item.rs
index 83086c0f75f2..4dd9014b0621 100644
--- a/gtk/src/auto/separator_tool_item.rs
+++ b/gtk/src/auto/separator_tool_item.rs
@@ -231,7 +231,6 @@ impl SeparatorToolItemBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<SeparatorToolItem>(&properties)
-            .expect("Failed to create an instance of SeparatorToolItem")
     }
 
     pub fn draw(mut self, draw: bool) -> Self {
diff --git a/gtk/src/auto/shortcuts_group.rs b/gtk/src/auto/shortcuts_group.rs
index 83b42ba3bc0a..8166b0afe0c3 100644
--- a/gtk/src/auto/shortcuts_group.rs
+++ b/gtk/src/auto/shortcuts_group.rs
@@ -386,7 +386,6 @@ impl ShortcutsGroupBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<ShortcutsGroup>(&properties)
-            .expect("Failed to create an instance of ShortcutsGroup")
     }
 
     pub fn accel_size_group(mut self, accel_size_group: &impl IsA<SizeGroup>) -> Self {
diff --git a/gtk/src/auto/shortcuts_section.rs b/gtk/src/auto/shortcuts_section.rs
index c9f04403d16f..c283edbfb740 100644
--- a/gtk/src/auto/shortcuts_section.rs
+++ b/gtk/src/auto/shortcuts_section.rs
@@ -399,7 +399,6 @@ impl ShortcutsSectionBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<ShortcutsSection>(&properties)
-            .expect("Failed to create an instance of ShortcutsSection")
     }
 
     pub fn max_height(mut self, max_height: u32) -> Self {
diff --git a/gtk/src/auto/shortcuts_shortcut.rs b/gtk/src/auto/shortcuts_shortcut.rs
index bb6adf252c0e..02490742ec63 100644
--- a/gtk/src/auto/shortcuts_shortcut.rs
+++ b/gtk/src/auto/shortcuts_shortcut.rs
@@ -608,7 +608,6 @@ impl ShortcutsShortcutBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<ShortcutsShortcut>(&properties)
-            .expect("Failed to create an instance of ShortcutsShortcut")
     }
 
     pub fn accel_size_group(mut self, accel_size_group: &impl IsA<SizeGroup>) -> Self {
diff --git a/gtk/src/auto/shortcuts_window.rs b/gtk/src/auto/shortcuts_window.rs
index b1b4be3c560c..7b3467ee3539 100644
--- a/gtk/src/auto/shortcuts_window.rs
+++ b/gtk/src/auto/shortcuts_window.rs
@@ -327,7 +327,6 @@ impl ShortcutsWindowBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<ShortcutsWindow>(&properties)
-            .expect("Failed to create an instance of ShortcutsWindow")
     }
 
     pub fn section_name(mut self, section_name: &str) -> Self {
diff --git a/gtk/src/auto/size_group.rs b/gtk/src/auto/size_group.rs
index c60848042a49..119a386954a7 100644
--- a/gtk/src/auto/size_group.rs
+++ b/gtk/src/auto/size_group.rs
@@ -46,7 +46,6 @@ impl SizeGroup {
 impl Default for SizeGroup {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct SizeGroup object with default parameters")
     }
 }
 
@@ -76,7 +75,6 @@ impl SizeGroupBuilder {
             properties.push(("mode", mode));
         }
         glib::Object::new::<SizeGroup>(&properties)
-            .expect("Failed to create an instance of SizeGroup")
     }
 
     pub fn mode(mut self, mode: SizeGroupMode) -> Self {
diff --git a/gtk/src/auto/socket.rs b/gtk/src/auto/socket.rs
index 5db283fa0972..e87fdd33ce28 100644
--- a/gtk/src/auto/socket.rs
+++ b/gtk/src/auto/socket.rs
@@ -213,7 +213,7 @@ impl SocketBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Socket>(&properties).expect("Failed to create an instance of Socket")
+        glib::Object::new::<Socket>(&properties)
     }
 
     pub fn border_width(mut self, border_width: u32) -> Self {
diff --git a/gtk/src/auto/socket_accessible.rs b/gtk/src/auto/socket_accessible.rs
index 3ad78d295da0..54e535b4d773 100644
--- a/gtk/src/auto/socket_accessible.rs
+++ b/gtk/src/auto/socket_accessible.rs
@@ -114,7 +114,6 @@ impl SocketAccessibleBuilder {
             properties.push(("accessible-value", accessible_value));
         }
         glib::Object::new::<SocketAccessible>(&properties)
-            .expect("Failed to create an instance of SocketAccessible")
     }
 
     pub fn accessible_description(mut self, accessible_description: &str) -> Self {
diff --git a/gtk/src/auto/spin_button.rs b/gtk/src/auto/spin_button.rs
index 98a1d7e6e233..6aafbb9eabd8 100644
--- a/gtk/src/auto/spin_button.rs
+++ b/gtk/src/auto/spin_button.rs
@@ -81,7 +81,6 @@ impl SpinButton {
 impl Default for SpinButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct SpinButton object with default parameters")
     }
 }
 
@@ -442,7 +441,6 @@ impl SpinButtonBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<SpinButton>(&properties)
-            .expect("Failed to create an instance of SpinButton")
     }
 
     pub fn adjustment(mut self, adjustment: &impl IsA<Adjustment>) -> Self {
diff --git a/gtk/src/auto/spinner.rs b/gtk/src/auto/spinner.rs
index 6e282f51e94c..a6bd7dd2374b 100644
--- a/gtk/src/auto/spinner.rs
+++ b/gtk/src/auto/spinner.rs
@@ -203,7 +203,7 @@ impl SpinnerBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Spinner>(&properties).expect("Failed to create an instance of Spinner")
+        glib::Object::new::<Spinner>(&properties)
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/stack.rs b/gtk/src/auto/stack.rs
index fd7bc982c653..3d58e83737b1 100644
--- a/gtk/src/auto/stack.rs
+++ b/gtk/src/auto/stack.rs
@@ -245,7 +245,7 @@ impl StackBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Stack>(&properties).expect("Failed to create an instance of Stack")
+        glib::Object::new::<Stack>(&properties)
     }
 
     pub fn hhomogeneous(mut self, hhomogeneous: bool) -> Self {
diff --git a/gtk/src/auto/stack_sidebar.rs b/gtk/src/auto/stack_sidebar.rs
index 4233b222b08c..aba441a88c25 100644
--- a/gtk/src/auto/stack_sidebar.rs
+++ b/gtk/src/auto/stack_sidebar.rs
@@ -219,7 +219,6 @@ impl StackSidebarBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<StackSidebar>(&properties)
-            .expect("Failed to create an instance of StackSidebar")
     }
 
     pub fn stack(mut self, stack: &impl IsA<Stack>) -> Self {
diff --git a/gtk/src/auto/statusbar.rs b/gtk/src/auto/statusbar.rs
index 01ed2894baa4..c716d27d98a0 100644
--- a/gtk/src/auto/statusbar.rs
+++ b/gtk/src/auto/statusbar.rs
@@ -233,7 +233,6 @@ impl StatusbarBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<Statusbar>(&properties)
-            .expect("Failed to create an instance of Statusbar")
     }
 
     pub fn baseline_position(mut self, baseline_position: BaselinePosition) -> Self {
diff --git a/gtk/src/auto/style_context.rs b/gtk/src/auto/style_context.rs
index 06cd6ae406e6..634859fbd840 100644
--- a/gtk/src/auto/style_context.rs
+++ b/gtk/src/auto/style_context.rs
@@ -127,7 +127,6 @@ impl StyleContextBuilder {
             properties.push(("screen", screen));
         }
         glib::Object::new::<StyleContext>(&properties)
-            .expect("Failed to create an instance of StyleContext")
     }
 
     pub fn direction(mut self, direction: TextDirection) -> Self {
diff --git a/gtk/src/auto/switch.rs b/gtk/src/auto/switch.rs
index b8ca81cee991..5d15c3940f60 100644
--- a/gtk/src/auto/switch.rs
+++ b/gtk/src/auto/switch.rs
@@ -217,7 +217,7 @@ impl SwitchBuilder {
         if let Some(ref action_target) = self.action_target {
             properties.push(("action-target", action_target));
         }
-        glib::Object::new::<Switch>(&properties).expect("Failed to create an instance of Switch")
+        glib::Object::new::<Switch>(&properties)
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/text_buffer.rs b/gtk/src/auto/text_buffer.rs
index c9bccb393a62..48f67a17f78f 100644
--- a/gtk/src/auto/text_buffer.rs
+++ b/gtk/src/auto/text_buffer.rs
@@ -56,7 +56,6 @@ impl TextBuffer {
 impl Default for TextBuffer {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct TextBuffer object with default parameters")
     }
 }
 
@@ -90,7 +89,6 @@ impl TextBufferBuilder {
             properties.push(("text", text));
         }
         glib::Object::new::<TextBuffer>(&properties)
-            .expect("Failed to create an instance of TextBuffer")
     }
 
     pub fn tag_table(mut self, tag_table: &impl IsA<TextTagTable>) -> Self {
diff --git a/gtk/src/auto/text_mark.rs b/gtk/src/auto/text_mark.rs
index e3925ecb1bed..8ac2bcb845eb 100644
--- a/gtk/src/auto/text_mark.rs
+++ b/gtk/src/auto/text_mark.rs
@@ -45,7 +45,6 @@ impl TextMark {
 impl Default for TextMark {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct TextMark object with default parameters")
     }
 }
 
@@ -79,7 +78,6 @@ impl TextMarkBuilder {
             properties.push(("name", name));
         }
         glib::Object::new::<TextMark>(&properties)
-            .expect("Failed to create an instance of TextMark")
     }
 
     pub fn left_gravity(mut self, left_gravity: bool) -> Self {
diff --git a/gtk/src/auto/text_tag.rs b/gtk/src/auto/text_tag.rs
index 35e9582f2a83..74588cb03730 100644
--- a/gtk/src/auto/text_tag.rs
+++ b/gtk/src/auto/text_tag.rs
@@ -47,7 +47,6 @@ impl TextTag {
 impl Default for TextTag {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct TextTag object with default parameters")
     }
 }
 
@@ -356,7 +355,7 @@ impl TextTagBuilder {
         if let Some(ref wrap_mode_set) = self.wrap_mode_set {
             properties.push(("wrap-mode-set", wrap_mode_set));
         }
-        glib::Object::new::<TextTag>(&properties).expect("Failed to create an instance of TextTag")
+        glib::Object::new::<TextTag>(&properties)
     }
 
     pub fn accumulative_margin(mut self, accumulative_margin: bool) -> Self {
diff --git a/gtk/src/auto/text_view.rs b/gtk/src/auto/text_view.rs
index 26b49e500bcf..c97eb94212cb 100644
--- a/gtk/src/auto/text_view.rs
+++ b/gtk/src/auto/text_view.rs
@@ -344,7 +344,6 @@ impl TextViewBuilder {
             properties.push(("vscroll-policy", vscroll_policy));
         }
         glib::Object::new::<TextView>(&properties)
-            .expect("Failed to create an instance of TextView")
     }
 
     pub fn accepts_tab(mut self, accepts_tab: bool) -> Self {
diff --git a/gtk/src/auto/toggle_button.rs b/gtk/src/auto/toggle_button.rs
index 6c4ff6175cdc..b8aa10a9a2e6 100644
--- a/gtk/src/auto/toggle_button.rs
+++ b/gtk/src/auto/toggle_button.rs
@@ -286,7 +286,6 @@ impl ToggleButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<ToggleButton>(&properties)
-            .expect("Failed to create an instance of ToggleButton")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/toggle_tool_button.rs b/gtk/src/auto/toggle_tool_button.rs
index 696aed447153..f66eef78ab90 100644
--- a/gtk/src/auto/toggle_tool_button.rs
+++ b/gtk/src/auto/toggle_tool_button.rs
@@ -261,7 +261,6 @@ impl ToggleToolButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<ToggleToolButton>(&properties)
-            .expect("Failed to create an instance of ToggleToolButton")
     }
 
     pub fn active(mut self, active: bool) -> Self {
diff --git a/gtk/src/auto/tool_button.rs b/gtk/src/auto/tool_button.rs
index e0d723377f7f..cb31af05d46b 100644
--- a/gtk/src/auto/tool_button.rs
+++ b/gtk/src/auto/tool_button.rs
@@ -58,7 +58,6 @@ impl ToolButton {
 impl Default for ToolButton {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct ToolButton object with default parameters")
     }
 }
 
@@ -264,7 +263,6 @@ impl ToolButtonBuilder {
             properties.push(("action-target", action_target));
         }
         glib::Object::new::<ToolButton>(&properties)
-            .expect("Failed to create an instance of ToolButton")
     }
 
     pub fn icon_name(mut self, icon_name: &str) -> Self {
diff --git a/gtk/src/auto/tool_item.rs b/gtk/src/auto/tool_item.rs
index 58e9746a1b65..c8d15df5b92a 100644
--- a/gtk/src/auto/tool_item.rs
+++ b/gtk/src/auto/tool_item.rs
@@ -231,7 +231,6 @@ impl ToolItemBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<ToolItem>(&properties)
-            .expect("Failed to create an instance of ToolItem")
     }
 
     pub fn is_important(mut self, is_important: bool) -> Self {
diff --git a/gtk/src/auto/tool_item_group.rs b/gtk/src/auto/tool_item_group.rs
index f82897cd0733..5ec51cd12084 100644
--- a/gtk/src/auto/tool_item_group.rs
+++ b/gtk/src/auto/tool_item_group.rs
@@ -54,7 +54,6 @@ impl ToolItemGroup {
 impl Default for ToolItemGroup {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct ToolItemGroup object with default parameters")
     }
 }
 
@@ -240,7 +239,6 @@ impl ToolItemGroupBuilder {
             properties.push(("width-request", width_request));
         }
         glib::Object::new::<ToolItemGroup>(&properties)
-            .expect("Failed to create an instance of ToolItemGroup")
     }
 
     pub fn collapsed(mut self, collapsed: bool) -> Self {
diff --git a/gtk/src/auto/tool_palette.rs b/gtk/src/auto/tool_palette.rs
index 4f9569a0acb0..ffbbe75ae3ed 100644
--- a/gtk/src/auto/tool_palette.rs
+++ b/gtk/src/auto/tool_palette.rs
@@ -272,7 +272,6 @@ impl ToolPaletteBuilder {
             properties.push(("vscroll-policy", vscroll_policy));
         }
         glib::Object::new::<ToolPalette>(&properties)
-            .expect("Failed to create an instance of ToolPalette")
     }
 
     pub fn icon_size(mut self, icon_size: IconSize) -> Self {
diff --git a/gtk/src/auto/toolbar.rs b/gtk/src/auto/toolbar.rs
index 9c6b907bd046..404cdcd579c5 100644
--- a/gtk/src/auto/toolbar.rs
+++ b/gtk/src/auto/toolbar.rs
@@ -240,7 +240,7 @@ impl ToolbarBuilder {
         if let Some(ref orientation) = self.orientation {
             properties.push(("orientation", orientation));
         }
-        glib::Object::new::<Toolbar>(&properties).expect("Failed to create an instance of Toolbar")
+        glib::Object::new::<Toolbar>(&properties)
     }
 
     pub fn icon_size(mut self, icon_size: IconSize) -> Self {
diff --git a/gtk/src/auto/tree_view.rs b/gtk/src/auto/tree_view.rs
index 708acf79bf46..77e631046b3b 100644
--- a/gtk/src/auto/tree_view.rs
+++ b/gtk/src/auto/tree_view.rs
@@ -326,7 +326,6 @@ impl TreeViewBuilder {
             properties.push(("vscroll-policy", vscroll_policy));
         }
         glib::Object::new::<TreeView>(&properties)
-            .expect("Failed to create an instance of TreeView")
     }
 
     pub fn activate_on_single_click(mut self, activate_on_single_click: bool) -> Self {
diff --git a/gtk/src/auto/tree_view_column.rs b/gtk/src/auto/tree_view_column.rs
index ea814c2a4be1..b044506a6497 100644
--- a/gtk/src/auto/tree_view_column.rs
+++ b/gtk/src/auto/tree_view_column.rs
@@ -157,7 +157,6 @@ impl TreeViewColumnBuilder {
             properties.push(("widget", widget));
         }
         glib::Object::new::<TreeViewColumn>(&properties)
-            .expect("Failed to create an instance of TreeViewColumn")
     }
 
     pub fn alignment(mut self, alignment: f32) -> Self {
diff --git a/gtk/src/auto/versions.txt b/gtk/src/auto/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/gtk/src/auto/versions.txt
+++ b/gtk/src/auto/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/gtk/src/auto/viewport.rs b/gtk/src/auto/viewport.rs
index f3758d1f7362..dd694fe619e8 100644
--- a/gtk/src/auto/viewport.rs
+++ b/gtk/src/auto/viewport.rs
@@ -62,7 +62,6 @@ impl Viewport {
 impl Default for Viewport {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Viewport object with default parameters")
     }
 }
 
@@ -248,7 +247,6 @@ impl ViewportBuilder {
             properties.push(("vscroll-policy", vscroll_policy));
         }
         glib::Object::new::<Viewport>(&properties)
-            .expect("Failed to create an instance of Viewport")
     }
 
     pub fn shadow_type(mut self, shadow_type: ShadowType) -> Self {
diff --git a/gtk/src/auto/volume_button.rs b/gtk/src/auto/volume_button.rs
index dfc8a6cc16ea..ef2a0bd04da1 100644
--- a/gtk/src/auto/volume_button.rs
+++ b/gtk/src/auto/volume_button.rs
@@ -279,7 +279,6 @@ impl VolumeButtonBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<VolumeButton>(&properties)
-            .expect("Failed to create an instance of VolumeButton")
     }
 
     pub fn use_symbolic(mut self, use_symbolic: bool) -> Self {
diff --git a/gtk/src/auto/window.rs b/gtk/src/auto/window.rs
index f0d712221907..9e6f3532fef6 100644
--- a/gtk/src/auto/window.rs
+++ b/gtk/src/auto/window.rs
@@ -139,7 +139,6 @@ impl Window {
 impl Default for Window {
     fn default() -> Self {
         glib::object::Object::new::<Self>(&[])
-            .expect("Can't construct Window object with default parameters")
     }
 }
 
@@ -416,7 +415,7 @@ impl WindowBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Window>(&properties).expect("Failed to create an instance of Window")
+        glib::Object::new::<Window>(&properties)
     }
 
     pub fn accept_focus(mut self, accept_focus: bool) -> Self {
diff --git a/gtk/src/builder.rs b/gtk/src/builder.rs
index 0867f9e31968..4b1f63c0b5cb 100644
--- a/gtk/src/builder.rs
+++ b/gtk/src/builder.rs
@@ -199,13 +199,11 @@ impl<O: IsA<Builder>> BuilderExtManual for O {
             let handler_name: Borrowed<GString> = from_glib_borrow(handler_name);
             let callback: *mut P = user_data as *const _ as usize as *mut P;
             let func = (*callback)(&builder, handler_name.as_str());
-            object
-                .try_connect_unsafe(
-                    signal_name.as_str(),
-                    flags & glib::gobject_ffi::G_CONNECT_AFTER != 0,
-                    move |args| func(args),
-                )
-                .expect("Failed to connect to builder signal");
+            object.connect_unsafe(
+                signal_name.as_str(),
+                flags & glib::gobject_ffi::G_CONNECT_AFTER != 0,
+                move |args| func(args),
+            );
         }
         let func = Some(func_func::<P> as _);
         let super_callback0: &P = &func_data;
diff --git a/gtk/src/image.rs b/gtk/src/image.rs
index 23c6ae1fdf6e..c7a89a7052f7 100644
--- a/gtk/src/image.rs
+++ b/gtk/src/image.rs
@@ -253,7 +253,7 @@ impl ImageBuilder {
         if let Some(ref width_request) = self.width_request {
             properties.push(("width-request", width_request));
         }
-        glib::Object::new::<Image>(&properties).expect("Failed to create an instance of Image")
+        glib::Object::new::<Image>(&properties)
     }
 
     pub fn file(mut self, file: &str) -> Self {
diff --git a/gtk/src/stack_switcher.rs b/gtk/src/stack_switcher.rs
index 89379497338e..cf14f00e62e9 100644
--- a/gtk/src/stack_switcher.rs
+++ b/gtk/src/stack_switcher.rs
@@ -259,7 +259,6 @@ impl StackSwitcherBuilder {
             properties.push(("orientation", orientation));
         }
         glib::Object::new::<StackSwitcher>(&properties)
-            .expect("Failed to create an instance of StackSwitcher")
     }
 
     pub fn icon_size(mut self, icon_size: IconSize) -> Self {
diff --git a/gtk/sys/versions.txt b/gtk/sys/versions.txt
index a7ca9d5617b2..809620801038 100644
--- a/gtk/sys/versions.txt
+++ b/gtk/sys/versions.txt
@@ -1,2 +1,2 @@
-Generated by gir (https://github.com/gtk-rs/gir @ 54e116a11822)
+Generated by gir (https://github.com/gtk-rs/gir @ b5068ede6c51)
 from gir-files (https://github.com/gtk-rs/gir-files @ 7ebd4478b4a5)
diff --git a/gtk3-macros/src/lib.rs b/gtk3-macros/src/lib.rs
index 16c054d03556..9bafa41a15b5 100644
--- a/gtk3-macros/src/lib.rs
+++ b/gtk3-macros/src/lib.rs
@@ -75,7 +75,7 @@ use syn::{parse_macro_input, DeriveInput};
 ///
 /// impl MyWidget {
 ///     pub fn new() -> Self {
-///         glib::Object::new(&[]).expect("Failed to create an instance of MyWidget")
+///         glib::Object::new(&[])
 ///     }
 /// }
 /// # fn main() {}