fix #79694

src/vs/editor/contrib/codelens/codelensController.ts

@@ -32,7 +32,7 @@ export class CodeLensContribution implements editorCommon.IEditorContribution {
 	private _currentCodeLensModel: CodeLensModel | undefined;
 	private _modelChangeCounter: number = 0;
 	private _currentResolveCodeLensSymbolsPromise: CancelablePromise<any> | undefined;
-	private _detectVisibleLenses!: RunOnceScheduler;
+	private _detectVisibleLenses: RunOnceScheduler | undefined;
 
 	constructor(
 		private readonly _editor: editorBrowser.ICodeEditor,
@@ -121,9 +121,7 @@ export class CodeLensContribution implements editorCommon.IEditorContribution {
 			}
 		}
 
-		this._detectVisibleLenses = new RunOnceScheduler(() => {
-			this._onViewportChanged();
-		}, 250);
+		const detectVisibleLenses = this._detectVisibleLenses = new RunOnceScheduler(() => this._onViewportChanged(), 250);
 
 		const scheduler = new RunOnceScheduler(() => {
 			const counterValue = ++this._modelChangeCounter;
@@ -145,12 +143,12 @@ export class CodeLensContribution implements editorCommon.IEditorContribution {
 
 					// render lenses
 					this._renderCodeLensSymbols(result);
-					this._detectVisibleLenses.schedule();
+					detectVisibleLenses.schedule();
 				}
 			}, onUnexpectedError);
 		}, 250);
 		this._localToDispose.add(scheduler);
-		this._localToDispose.add(this._detectVisibleLenses);
+		this._localToDispose.add(detectVisibleLenses);
 		this._localToDispose.add(this._editor.onDidChangeModelContent(() => {
 			this._editor.changeDecorations(decorationsAccessor => {
 				this._editor.changeViewZones(viewZonesAccessor => {
@@ -179,17 +177,17 @@ export class CodeLensContribution implements editorCommon.IEditorContribution {
 			});
 
 			// Compute new `visible` code lenses
-			this._detectVisibleLenses.schedule();
+			detectVisibleLenses.schedule();
 			// Ask for all references again
 			scheduler.schedule();
 		}));
 		this._localToDispose.add(this._editor.onDidScrollChange(e => {
 			if (e.scrollTopChanged && this._lenses.length > 0) {
-				this._detectVisibleLenses.schedule();
+				detectVisibleLenses.schedule();
 			}
 		}));
 		this._localToDispose.add(this._editor.onDidLayoutChange(() => {
-			this._detectVisibleLenses.schedule();
+			detectVisibleLenses.schedule();
 		}));
 		this._localToDispose.add(toDisposable(() => {
 			if (this._editor.getModel()) {
@@ -281,7 +279,7 @@ export class CodeLensContribution implements editorCommon.IEditorContribution {
 						groupsIndex++;
 						codeLensIndex++;
 					} else {
-						this._lenses.splice(codeLensIndex, 0, new CodeLensWidget(groups[groupsIndex], this._editor, helper, viewZoneAccessor, () => this._detectVisibleLenses.schedule()));
+						this._lenses.splice(codeLensIndex, 0, new CodeLensWidget(groups[groupsIndex], this._editor, helper, viewZoneAccessor, () => this._detectVisibleLenses && this._detectVisibleLenses.schedule()));
 						codeLensIndex++;
 						groupsIndex++;
 					}
@@ -295,7 +293,7 @@ export class CodeLensContribution implements editorCommon.IEditorContribution {
 
 				// Create extra symbols
 				while (groupsIndex < groups.length) {
-					this._lenses.push(new CodeLensWidget(groups[groupsIndex], this._editor, helper, viewZoneAccessor, () => this._detectVisibleLenses.schedule()));
+					this._lenses.push(new CodeLensWidget(groups[groupsIndex], this._editor, helper, viewZoneAccessor, () => this._detectVisibleLenses && this._detectVisibleLenses.schedule()));
 					groupsIndex++;
 				}