wire up dispose calls: controller -> model -> oracle, fixes #12882

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

@@ -61,6 +61,7 @@ export class QuickFixController implements IEditorContribution {
 
 	public dispose(): void {
 		this._quickFixWidget.dispose();
+		this._model.dispose();
 		dispose(this._disposables);
 	}
 

src/vs/editor/contrib/quickFix/browser/quickFixModel.ts

@@ -122,6 +122,7 @@ export class QuickFixModel {
 
 	dispose(): void {
 		this._disposables = dispose(this._disposables);
+		dispose(this._quickFixOracle);
 	}
 
 	get onDidChangeFixes(): Event<QuickFixComputeEvent> {