Explain why model may be missing (jupyterlab#13763)

skyetim · Jan 14, 2023 · 0991b41 · 0991b41
1 parent 65e6171
commit 0991b41
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/packages/cell-toolbar/src/celltoolbartracker.ts b/packages/cell-toolbar/src/celltoolbartracker.ts
@@ -63,7 +63,8 @@ export class CellToolbarTracker implements IDisposable {
   }
 
   _onActiveCellChanged(notebook: Notebook): void {
-    if (this._previousActiveCell?.model) {
+    if (this._previousActiveCell && !this._previousActiveCell.isDisposed) {
+      // Disposed cells do not have model anymore.
       this._removeToolbar(this._previousActiveCell.model);
     }