Bug 1330755 - Properly release the window device context. r=jimm

MozReview-Commit-ID: 7Y3p4g3yI3s --HG-- extra : rebase_source : 111817e743836644fb1077c9b961cfe99a62980f
dothq · Jan 12, 2017 · a147e85 · a147e85
1 parent 58d4348
commit a147e85
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/widget/windows/nsWindow.cpp b/widget/windows/nsWindow.cpp
@@ -1423,7 +1423,10 @@ nsWindow::CreateScrollSnapshot()
     return GetFallbackScrollSnapshot(clip);
   }
 
-  nsAutoHDC windowDC(::GetDC(mWnd));
+  HDC windowDC = ::GetDC(mWnd);
+  auto releaseDC = MakeScopeExit([&] {
+    ::ReleaseDC(mWnd, windowDC);
+  });
   if (!windowDC) {
     return GetFallbackScrollSnapshot(clip);
   }