Fix #38920. Optional dependency to fileservice. (#38921)

src/vs/editor/contrib/quickFix/quickFixCommands.ts

@@ -11,6 +11,7 @@ import { ICommandService } from 'vs/platform/commands/common/commands';
 import { IContextMenuService } from 'vs/platform/contextview/browser/contextView';
 import { ContextKeyExpr, IContextKeyService } from 'vs/platform/contextkey/common/contextkey';
 import { IKeybindingService } from 'vs/platform/keybinding/common/keybinding';
+import { optional } from 'vs/platform/instantiation/common/instantiation';
 import { IMarkerService } from 'vs/platform/markers/common/markers';
 import { IEditorContribution } from 'vs/editor/common/editorCommon';
 import { EditorContextKeys } from 'vs/editor/common/editorContextKeys';
@@ -46,7 +47,7 @@ export class QuickFixController implements IEditorContribution {
 		@IContextMenuService contextMenuService: IContextMenuService,
 		@IKeybindingService private readonly _keybindingService: IKeybindingService,
 		@ITextModelService private readonly _textModelService: ITextModelService,
-		@IFileService private _fileService: IFileService
+		@optional(IFileService) private _fileService: IFileService
 	) {
 		this._editor = editor;
 		this._model = new QuickFixModel(this._editor, markerService);