Bug: Intermittent browser/components/preferences/tests/browser_searchDefaultEngine.js | Test timed out -
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-08-14 03:48:57+00:00
Resolved: 2021-09-07 17:06:57+00:00

**Filed by:** nerli [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=348414185&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/REPSSZYTRlu5RJU1HMHUoA/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-08-14T03:06:12.587Z] 03:06:12     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_searchDefaultEngine.js | Test timed out - 
[task 2021-08-14T03:06:12.588Z] 03:06:12     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-14T03:06:12.589Z] 03:06:12     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_searchDefaultEngine.js | Uncaught exception received from previously timed out test - Initialized listener not removed before the end of test
[task 2021-08-14T03:06:12.589Z] 03:06:12     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-14T03:06:12.590Z] 03:06:12     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_searchDefaultEngine.js | A promise chain failed to handle a rejection: out of memory - stack: (No stack available.)
[task 2021-08-14T03:06:12.591Z] 03:06:12     INFO - Rejection date: Sat Aug 14 2021 03:05:29 GMT+0000 (Coordinated Universal Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 285
[task 2021-08-14T03:06:12.591Z] 03:06:12     INFO - Stack trace:
[task 2021-08-14T03:06:12.591Z] 03:06:12     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:285
[task 2021-08-14T03:06:12.591Z] 03:06:12     INFO - chrome://mochikit/content/browser-test.js:nextTest:625
[task 2021-08-14T03:06:12.591Z] 03:06:12     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-08-14T03:06:12.593Z] 03:06:12     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_searchDefaultEngine.js | A promise chain failed to handle a rejection: sync-pane-loaded observer not removed before the end of test - stack: (No stack available.)
[task 2021-08-14T03:06:12.593Z] 03:06:12     INFO - Rejection date: Sat Aug 14 2021 03:06:12 GMT+0000 (Coordinated Universal Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 285
[task 2021-08-14T03:06:12.593Z] 03:06:12     INFO - Stack trace:
[task 2021-08-14T03:06:12.593Z] 03:06:12     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:285
[task 2021-08-14T03:06:12.593Z] 03:06:12     INFO - chrome://mochikit/content/browser-test.js:nextTest:625
[task 2021-08-14T03:06:12.594Z] 03:06:12     INFO - GECKO(5620) | JavaScript error: resource://testing-common/PromiseTestUtils.jsm, line 131: uncaught exception: sync-pane-loaded observer not removed before the end of test
[task 2021-08-14T03:06:12.595Z] 03:06:12     INFO - Console message: [JavaScript Error: "uncaught exception: sync-pane-loaded observer not removed before the end of test" {file: "resource://testing-common/PromiseTestUtils.jsm" line: 131}]
[task 2021-08-14T03:06:12.595Z] 03:06:12     INFO - GECKO(5620) | MEMORY STAT | vsize 1728MB | vsizeMaxContiguous 6MB | residentFast 730MB | heapAllocated 562MB
```