Bug: Intermittent browser/components/preferences/tests/browser_change_app_handler.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2023-05-12 00:00:07+00:00
Resolved: 2023-07-10 12:01:30+00:00

**Filed by:** smolnar [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=415426559&repo=mozilla-beta
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/RMBWKGaoSxSIgT_QT89iXw/runs/0/artifacts/public/logs/live_backing.log

---
```
INFO - TEST-PASS | browser/components/preferences/tests/browser_change_app_handler.js | General pane was selected - 
[task 2023-05-11T22:30:53.721Z] 22:30:53     INFO - TEST-INFO | started process screenshot
[task 2023-05-11T22:30:53.862Z] 22:30:53     INFO - TEST-INFO | screenshot: exit 0
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_change_app_handler.js | handlersView is present - 
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - Stack trace:
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - chrome://mochikit/content/browser-test.js:test_ok:1584
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_change_app_handler.js:null:41
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - chrome://mochikit/content/browser-test.js:handleTask:1133
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - chrome://mochikit/content/browser-test.js:_runTaskBasedTest:1205
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1347
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1122
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/<:1056
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - Not taking screenshot here: see the one that was previously logged
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_change_app_handler.js | Uncaught exception in test bound  - at chrome://mochitests/content/browser/browser/components/preferences/tests/browser_change_app_handler.js:42 - TypeError: ourItem is null
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - Stack trace:
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - @chrome://mochitests/content/browser/browser/components/preferences/tests/browser_change_app_handler.js:42:3
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - async*handleTask@chrome://mochikit/content/browser-test.js:1133:26
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - _runTaskBasedTest@chrome://mochikit/content/browser-test.js:1205:18
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - Tester_execTest@chrome://mochikit/content/browser-test.js:1347:14
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - nextTest/<@chrome://mochikit/content/browser-test.js:1122:14
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - SimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1056:13
[task 2023-05-11T22:30:53.870Z] 22:30:53     INFO - Leaving test bound 
[task 2023-05-11T22:30:54.050Z] 22:30:54     INFO - GECKO(4688) | MEMORY STAT | vsize 1320MB | vsizeMaxContiguous 198MB | residentFast 523MB | heapAllocated 324MB
[task 2023-05-11T22:30:54.050Z] 22:30:54     INFO - TEST-OK | browser/components/preferences/tests/browser_change_app_handler.js | took 2302ms
[task 2023-05-11T22:30:54.050Z] 22:30:54     INFO - Not taking screenshot here: see the one that was previously logged
[task 2023-05-11T22:30:54.050Z] 22:30:54     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_change_app_handler.js | Found an unexpected tab at the end of test run: about:preferences#general - 
[task 2023-05-11T22:30:54.073Z] 22:30:54     INFO - checking window state
[task 2023-05-11T22:30:54.190Z] 22:30:54     INFO - TEST-START | browser/components/preferences/tests/browser_checkspelling.js
[task 2023-05-11T22:30:55.479Z] 22:30:55     INFO - GECKO(4688) | MEMORY STAT | vsize 1211MB | vsizeMaxContiguous 198MB | residentFast 452MB | heapAllocated 311MB
[task 2023-05-11T22:30:55.487Z] 22:30:55     INFO - TEST-OK | browser/components/preferences/tests/browser_checkspelling.js | took 1296ms
```