no layout after list view being disposed.

src/vs/workbench/api/browser/mainThreadNotebook.ts

@@ -44,7 +44,7 @@ export class MainThreadNotebookDocument extends Disposable {
 		}));
 	}
 
-	async applyEdit(modelVersionId: number, edits: ICellEditOperation[]): Promise<boolean> {
+	async applyEdit(modelVersionId: number, edits: ICellEditOperation[], emitToExtHost: boolean): Promise<boolean> {
 		await this.notebookService.transformEditsOutputs(this.textModel, edits);
 		return this._textModel.$applyEdit(modelVersionId, edits);
 	}
@@ -462,10 +462,10 @@ export class MainThreadNotebookController implements IMainNotebookController {
 
 				mainthreadNotebook.textModel.languages = data.languages;
 				mainthreadNotebook.textModel.metadata = data.metadata;
-				mainthreadNotebook.textModel.$applyEdit(mainthreadNotebook.textModel.versionId, [
+				await mainthreadNotebook.applyEdit(mainthreadNotebook.textModel.versionId, [
 					{ editType: CellEditType.Delete, count: mainthreadNotebook.textModel.cells.length, index: 0 },
 					{ editType: CellEditType.Insert, index: 0, cells: data.cells }
-				]);
+				], true);
 			}
 			return mainthreadNotebook.textModel;
 		}
@@ -479,7 +479,7 @@ export class MainThreadNotebookController implements IMainNotebookController {
 			document.textModel.languages = backup.languages;
 
 			// restored from backup, update the text model without emitting any event to exthost
-			document.textModel.$applyEdit(document.textModel.versionId, [
+			await document.applyEdit(document.textModel.versionId, [
 				{
 					editType: CellEditType.Insert,
 					index: 0,
@@ -558,7 +558,7 @@ export class MainThreadNotebookController implements IMainNotebookController {
 		let mainthreadNotebook = this._mapping.get(URI.from(resource).toString());
 
 		if (mainthreadNotebook) {
-			return await mainthreadNotebook.applyEdit(modelVersionId, edits);
+			return await mainthreadNotebook.applyEdit(modelVersionId, edits, true);
 		}
 
 		return false;

src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts

@@ -527,6 +527,10 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditor
 
 		this.localStore.add(this.list!.onDidChangeContentHeight(() => {
 			DOM.scheduleAtNextAnimationFrame(() => {
+				if (this._isDisposed) {
+					return;
+				}
+
 				const scrollTop = this.list?.scrollTop || 0;
 				const scrollHeight = this.list?.scrollHeight || 0;
 				this.webview!.element.style.height = `${scrollHeight}px`;
@@ -1330,7 +1334,7 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditor
 		}
 
 		this.localStore.clear();
-		this.list?.clear();
+		this.list?.dispose();
 		this.webview?.dispose();
 
 		this.overlayContainer.remove();