Bug: Intermittent browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Clicking on mute should not change the currently selected tab - Got [object XULElement], expected [object XULElement]
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2022-02-17 03:45:53+00:00
Resolved: 2022-07-25 23:07:46+00:00

**Filed by:** abutkovits [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=368175450&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/dCZOY_13SEOU3SGrbpp0Eg/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2022-02-17T02:31:34.126Z] 02:31:34     INFO - TEST-PASS | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Tab4 is not activemedia-blocked - 
[task 2022-02-17T02:31:34.127Z] 02:31:34     INFO - Buffered messages finished
[task 2022-02-17T02:31:34.128Z] 02:31:34     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Clicking on mute should not change the currently selected tab - Got [object XULElement], expected [object XULElement]
[task 2022-02-17T02:31:34.128Z] 02:31:34     INFO - Stack trace:
[task 2022-02-17T02:31:34.128Z] 02:31:34     INFO - chrome://mochikit/content/browser-test.js:test_is:1422
[task 2022-02-17T02:31:34.128Z] 02:31:34     INFO - chrome://mochitests/content/browser/browser/base/content/test/tabs/head.js:test_mute_tab:230
[task 2022-02-17T02:31:34.129Z] 02:31:34     INFO - TEST-PASS | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | The tab should not be playing - 
[task 2022-02-17T02:32:15.537Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.537Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Test timed out - 
[task 2022-02-17T02:32:15.540Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.541Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Uncaught exception received from previously timed out test - TabAttrModified listener not removed before the end of test
[task 2022-02-17T02:32:15.541Z] 02:32:15     INFO - Entering test bound unmuteTabs_usingButton
[task 2022-02-17T02:32:15.570Z] 02:32:15     INFO - GECKO(11736) | MEMORY STAT | vsize 3830MB | residentFast 365MB | heapAllocated 260MB
[task 2022-02-17T02:32:15.573Z] 02:32:15     INFO - TEST-OK | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | took 45039ms
[task 2022-02-17T02:32:15.576Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.576Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Found a tab after previous test timed out: about:blank - 
[task 2022-02-17T02:32:15.590Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.590Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Found a tab after previous test timed out: https://example.com/browser/browser/base/content/test/tabs/file_mediaPlayback.html - 
[task 2022-02-17T02:32:15.598Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.598Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Found a tab after previous test timed out: https://example.com/browser/browser/base/content/test/tabs/file_mediaPlayback.html - 
[task 2022-02-17T02:32:15.606Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.607Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Found a tab after previous test timed out: https://example.com/browser/browser/base/content/test/tabs/file_mediaPlayback.html - 
[task 2022-02-17T02:32:15.622Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.624Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Found a tab after previous test timed out: https://example.com/browser/browser/base/content/test/tabs/file_mediaPlayback.html - 
[task 2022-02-17T02:32:15.634Z] 02:32:15     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-02-17T02:32:15.634Z] 02:32:15     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/tabs/browser_multiselect_tabs_mute_unmute.js | Found a tab after previous test timed out: https://example.com/browser/browser/base/content/test/tabs/file_mediaPlayback.html - 
[task 2022-02-17T02:32:15.687Z] 02:32:15     INFO - checking window state
[task 2022-02-17T02:32:15.726Z] 02:32:15     INFO - GECKO(11736) | JavaScript error: resource://gre/actors/AudioPlaybackParent.jsm, line 24: TypeError: can't access property "audioPlaybackStopped", browser is null
[task 2022-02-17T02:32:15.743Z] 02:32:15     INFO - TEST-START | browser/base/content/test/tabs/browser_multiselect_tabs_open_related.js
```