{"record":{"id":"e9f1497a8d155116","repo":"quasarframework/quasar","slug":"the-queued-task-for-task-diffname-failed","errorCode":null,"errorMessage":"The queued task for \"${task.diffName}\" failed","messagePattern":"The queued task for \"(.+?)\" failed","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"app-vite/lib/app-devserver.js","lineNumber":297,"sourceCode":"      // wait for any pending task to settle before\n      // running the next queued one\n      if (this.#pendingTask !== null) {\n        await this.#pendingTask.catch(() => {})\n        // a sibling executor may have run (and drained)\n        // the queue in the meantime, so re-check everything\n        continue\n      }\n\n      const task = this.#watcherQueue.shift()\n      if (!this.#diff(task.diffName, false)) {\n        // a failed task must not stop the executor,\n        // otherwise the still queued tasks would never run\n        // (and neither would any future ones)\n        try {\n          await this.#runTask(task.fn(this.#latestQuasarConf, task.diffName))\n        } catch (err) {\n          console.error(err)\n          warn(`The queued task for \"${task.diffName}\" failed`)\n        }\n      }\n    }\n  }\n\n  reloadClient() {\n    this.clientNeedsReload = false\n    this.clientServer?.ws.send({ type: 'full-reload' })\n  }\n\n  async rebootClient(newServer) {\n    this.clientNeedsReload = false\n\n    if (this.clientServer !== null) {\n      const watcher = this.clientServer\n      this.clientServer = null\n      await watcher.close()\n    }","sourceCodeStart":279,"sourceCodeEnd":315,"githubUrl":"https://github.com/quasarframework/quasar/blob/4841521b5f635a971eb9e2710e5542efd194691b/app-vite/lib/app-devserver.js#L279-L315","documentation":"The dev server's internal task queue runs deferred tasks (registered while the server was busy) against the latest quasar config. If a queued task function throws or its promise rejects, the error is logged to console and this warning is emitted, so one bad task doesn't block the remaining queued tasks or future ones.","triggerScenarios":"A task queued via devServer.queue() during dev throws — e.g. a build.afterDev/style hook, a plugin callback, or framework extension task that fails against the new quasar config after a quasar.config change.","commonSituations":"Editing quasar.config.js while dev server runs and a watcher/extension task fails against the new config; a third-party Quasar extension's queued task incompatible with the changed config; syntax error in a custom afterDev hook.","solutions":["Look at the `err` printed above the warning (console.error(err)) to identify the failing task","Fix the error in the hook/extension that queued the task (often build.afterDev or a plugin callback)","Re-save quasar.config.js to retrigger the task after fixing","Temporarily comment out recently added config hooks to isolate the failing one"],"exampleFix":"// before (quasar.config.js)\nbuild: {\n  afterDev(ctx) { missingFunction() }\n}\n// after\nbuild: {\n  afterDev(ctx) { try { definedFunction() } catch (e) { console.error(e) } }\n}","handlingStrategy":"try-catch","validationCode":"// guard queued hooks before they run\nif (typeof build.afterDev === 'function') { /* safe to queue */ }","typeGuard":null,"tryCatchPattern":"// in your queued task / hook\ntry {\n  await runAgainstConf(quasarConf)\n} catch (err) {\n  console.error('Task failed against new quasar config:', err)\n}","preventionTips":["Always read the console.error(err) printed above this warning to find the real cause","Validate quasar.config.js changes incrementally, one option at a time","Wrap custom build.afterDev/extension hooks in try/catch","Keep third-party Quasar extensions updated for compatibility with your Quasar version"],"tags":["dev-server","task-queue","quasar-config"],"backgroundTag":"queued-task-failed","analyzedSha":"4841521b5f635a971eb9e2710e5542efd194691b","analyzedAt":"2026-08-30T01:13:14.944Z","schemaVersion":2},"datasetVersion":"2026-08-30T03:17:51.788Z"}