retain non existing view customizations

src/vs/workbench/services/views/browser/viewDescriptorService.ts

@@ -588,23 +588,24 @@ export class ViewDescriptorService extends Disposable implements IViewDescriptor
 
 		for (const [containerId, location] of this.viewContainersCustomLocations) {
 			const container = this.getViewContainerById(containerId);
-			// Save only if the view container exists and
-			// the view container is generated or not at default location
-			if (container && (this.isGeneratedContainerId(containerId) || location !== this.getDefaultViewContainerLocation(container))) {
-				viewCustomizations.viewContainerLocations[containerId] = location;
+			// Skip if the view container is not a generated container and in default location
+			if (container && !this.isGeneratedContainerId(containerId) && location === this.getDefaultViewContainerLocation(container)) {
+				continue;
 			}
+			viewCustomizations.viewContainerLocations[containerId] = location;
 		}
 
-		for (const viewContainer of this.viewContainers) {
-			const viewContainerModel = this.getViewContainerModel(viewContainer);
-			for (const viewDescriptor of viewContainerModel.allViewDescriptors) {
-				const defaultContainer = this.getDefaultContainerById(viewDescriptor.id);
-				// Save only if the view is not in the default container
+		for (const [viewId, viewContainerId] of this.viewDescriptorsCustomLocations) {
+			const viewContainer = this.getViewContainerById(viewContainerId);
+			if (viewContainer) {
+				const defaultContainer = this.getDefaultContainerById(viewId);
+				// Skip if the view is at default location
 				// https://github.com/microsoft/vscode/issues/90414
-				if (defaultContainer?.id !== viewContainer.id) {
-					viewCustomizations.viewLocations[viewDescriptor.id] = viewContainer.id;
+				if (defaultContainer?.id === viewContainer.id) {
+					continue;
 				}
 			}
+			viewCustomizations.viewLocations[viewId] = viewContainerId;
 		}
 
 		this.viewCustomizations = viewCustomizations;

src/vs/workbench/services/views/test/browser/viewDescriptorService.test.ts

@@ -584,4 +584,41 @@ suite('ViewDescriptorService', () => {
 		assert.deepStrictEqual(viewContainer1Views.allViewDescriptors.map(v => v.id), ['view4']);
 	});
 
+	test('view containers with not existing views are not removed from customizations', async function () {
+		const storageService = instantiationService.get(IStorageService);
+		const viewContainer1 = ViewContainersRegistry.registerViewContainer({ id: `${viewContainerIdPrefix}-${generateUuid()}`, title: 'test', ctorDescriptor: new SyncDescriptor(<any>{}) }, ViewContainerLocation.Sidebar);
+		const generateViewContainer1 = `workbench.views.service.${ViewContainerLocationToString(ViewContainerLocation.Sidebar)}.${generateUuid()}`;
+		const viewsCustomizations = {
+			viewContainerLocations: {
+				[generateViewContainer1]: ViewContainerLocation.Sidebar,
+				[viewContainer1.id]: ViewContainerLocation.AuxiliaryBar
+			},
+			viewLocations: {
+				'view5': generateViewContainer1
+			}
+		};
+		storageService.store('views.customizations', JSON.stringify(viewsCustomizations), StorageScope.PROFILE, StorageTarget.USER);
+
+		const viewDescriptors: IViewDescriptor[] = [
+			{
+				id: 'view1',
+				ctorDescriptor: null!,
+				name: 'Test View 1',
+				canMoveView: true
+			}
+		];
+
+		ViewsRegistry.registerViews(viewDescriptors, viewContainer1);
+
+		const testObject = aViewDescriptorService();
+		testObject.onDidRegisterExtensions();
+
+		const viewContainer1Views = testObject.getViewContainerModel(viewContainer1);
+		assert.deepStrictEqual(testObject.getViewContainerLocation(viewContainer1), ViewContainerLocation.AuxiliaryBar);
+		assert.deepStrictEqual(viewContainer1Views.allViewDescriptors.map(v => v.id), ['view1']);
+
+		const actual = JSON.parse(storageService.get('views.customizations', StorageScope.PROFILE)!);
+		assert.deepStrictEqual(actual, viewsCustomizations);
+	});
+
 });