only have the n second timeout for prelaunch tasks that do not send an active event

src/vs/workbench/parts/debug/electron-browser/debugService.ts

@@ -707,6 +707,9 @@ export class DebugService implements IDebugService {
 					// task is already running - nothing to do.
 					return Promise.resolve(null);
 				}
+				once(TaskEventKind.Active, this.taskService.onDidStateChange)((taskEvent) => {
+					taskStarted = true;
+				});
 				const taskPromise = this.taskService.run(task);
 				if (task.isBackground) {
 					return new Promise((c, e) => once(TaskEventKind.Inactive, this.taskService.onDidStateChange)(() => {