Bug: Intermittent Assertion failure after "Et tu, Brute?" in log
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-05-13 12:36:43+00:00
Resolved: 2021-02-02 17:01:06+00:00

**Filed by:** abutkovits [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=302085270&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/VENWdppeRIiSbmFaRW1AWw/runs/0/artifacts/public/logs/live_backing.log

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[task 2020-05-13T11:37:32.481Z] 11:37:32     INFO - TEST-START | browser/components/sessionstore/test/browser_revive_crashed_bg_tabs.js
[task 2020-05-13T11:37:32.632Z] 11:37:32     INFO - GECKO(7392) | Et tu, Brute?
[task 2020-05-13T11:37:33.431Z] 11:37:33     INFO - GECKO(7392) | Assertion failure
[task 2020-05-13T11:37:33.432Z] 11:37:33     INFO - GECKO(7392) | assert@resource:///modules/AsyncTabSwitcher.jsm:499:36
[task 2020-05-13T11:37:33.432Z] 11:37:33     INFO - GECKO(7392) | finish@resource:///modules/AsyncTabSwitcher.jsm:331:10
[task 2020-05-13T11:37:33.432Z] 11:37:33     INFO - GECKO(7392) | postActions@resource:///modules/AsyncTabSwitcher.jsm:697:12
[task 2020-05-13T11:37:33.433Z] 11:37:33     INFO - GECKO(7392) | handleEvent@resource:///modules/AsyncTabSwitcher.jsm:1116:12
[task 2020-05-13T11:37:33.433Z] 11:37:33     INFO - GECKO(7392) | updateBrowserRemoteness@chrome://browser/content/tabbrowser.js:1999:11
[task 2020-05-13T11:37:33.433Z] 11:37:33     INFO - GECKO(7392) | onBackgroundBrowserCrash@resource:///modules/ContentCrashHandlers.jsm:274:14
[task 2020-05-13T11:37:33.433Z] 11:37:33     INFO - GECKO(7392) | onTabCrashed@chrome://browser/content/tabbrowser.js:5506:27
[task 2020-05-13T11:37:33.434Z] 11:37:33     INFO - GECKO(7392) | EventListener.handleEvent*addEventListener@chrome://browser/content/tabbrowser.js:265:22
[task 2020-05-13T11:37:33.434Z] 11:37:33     INFO - GECKO(7392) | _setupEventListeners@chrome://browser/content/tabbrowser.js:5516:12
[task 2020-05-13T11:37:33.434Z] 11:37:33     INFO - GECKO(7392) | init@chrome://browser/content/tabbrowser.js:77:12
[task 2020-05-13T11:37:33.434Z] 11:37:33     INFO - GECKO(7392) | onDOMContentLoaded@chrome://browser/content/browser.js:1784:14
[task 2020-05-13T11:37:33.434Z] 11:37:33     INFO - GECKO(7392) | EventListener.handleEvent*@chrome://browser/content/browser.xhtml:134:10
[task 2020-05-13T11:37:33.506Z] 11:37:33     INFO - GECKO(7392) | [Parent 4920, Gecko_IOThread] WARNING: file /builds/worker/checkouts/gecko/ipc/chromium/src/base/process_util_win.cc, line 166
[task 2020-05-13T11:37:33.547Z] 11:37:33     INFO - GECKO(7392) | about:tabcrashed loaded and ready
[task 2020-05-13T11:37:35.161Z] 11:37:35     INFO - GECKO(7392) | Crash cleaned up
[task 2020-05-13T11:37:35.263Z] 11:37:35     INFO - GECKO(7392) | JavaScript error: resource:///modules/ContentCrashHandlers.jsm, line 50: TypeError: can't access property "permanentKey", browser is undefined
[task 2020-05-13T11:37:35.343Z] 11:37:35     INFO - GECKO(7392) | MEMORY STAT | vsize 2104940MB | vsizeMaxContiguous 66720121MB | residentFast 476MB | heapAllocated 182MB
[task 2020-05-13T11:37:35.343Z] 11:37:35     INFO - TEST-OK | browser/components/sessionstore/test/browser_revive_crashed_bg_tabs.js | took 2858ms

[task 2020-05-13T11:40:14.663Z] 11:40:14     INFO - TEST-START | browser/modules/test/browser/browser_urlBar_zoom.js
[task 2020-05-13T11:40:14.685Z] 11:40:14     INFO - GECKO(3688) | Waiting for browser load
[task 2020-05-13T11:40:14.715Z] 11:40:14     INFO - GECKO(3688) | Saw state f0001 and status 0
[task 2020-05-13T11:40:14.773Z] 11:40:14     INFO - GECKO(3688) | Saw state c0010 and status 0
[task 2020-05-13T11:40:14.773Z] 11:40:14     INFO - GECKO(3688) | Browser loaded https://example.com/
[task 2020-05-13T11:40:15.025Z] 11:40:15     INFO - GECKO(3688) | Waiting for browser load
[task 2020-05-13T11:40:15.046Z] 11:40:15     INFO - GECKO(3688) | Saw state f0001 and status 0
[task 2020-05-13T11:40:15.115Z] 11:40:15     INFO - GECKO(3688) | Saw state c0010 and status 0
[task 2020-05-13T11:40:15.115Z] 11:40:15     INFO - GECKO(3688) | Browser loaded https://example.com/
[task 2020-05-13T11:40:15.322Z] 11:40:15     INFO - TEST-INFO | started process screenshot
[task 2020-05-13T11:40:15.403Z] 11:40:15     INFO - TEST-INFO | screenshot: exit 0
[task 2020-05-13T11:40:15.403Z] 11:40:15     INFO - Buffered messages logged at 11:40:14
[task 2020-05-13T11:40:15.404Z] 11:40:15     INFO - Entering test bound 
[task 2020-05-13T11:40:15.404Z] 11:40:15     INFO - Running this test with FullZoomC
[task 2020-05-13T11:40:15.405Z] 11:40:15     INFO - Confirm whether the browser zoom is set to the default level
[task 2020-05-13T11:40:15.405Z] 11:40:15     INFO - TEST-PASS | browser/modules/test/browser/browser_urlBar_zoom.js | Page zoom is set to default (100%) - 
[task 2020-05-13T11:40:15.405Z] 11:40:15     INFO - TEST-PASS | browser/modules/test/browser/browser_urlBar_zoom.js | Zoom reset button is currently hidden - 
[task 2020-05-13T11:40:15.406Z] 11:40:15     INFO - Change zoom and confirm zoom button appears
[task 2020-05-13T11:40:15.406Z] 11:40:15     INFO - Zoom increased to 110%
[task 2020-05-13T11:40:15.407Z] 11:40:15     INFO - TEST-PASS | browser/modules/test/browser/browser_urlBar_zoom.js | Zoom reset button is now visible - 
[task 2020-05-13T11:40:15.407Z] 11:40:15     INFO - TEST-PASS | browser/modules/test/browser/browser_urlBar_zoom.js | Button label updated successfully to 110% - 
[task 2020-05-13T11:40:15.408Z] 11:40:15     INFO - TEST-PASS | browser/modules/test/browser/browser_urlBar_zoom.js | Clicking zoom button successfully resets browser zoom to 100% - 
[task 2020-05-13T11:40:15.408Z] 11:40:15     INFO - TEST-PASS | browser/modules/test/browser/browser_urlBar_zoom.js | Zoom reset button returns to being hidden - 
[task 2020-05-13T11:40:15.409Z] 11:40:15     INFO - Buffered messages logged at 11:40:15
[task 2020-05-13T11:40:15.409Z] 11:40:15     INFO - Running this test with TextZoomC
[task 2020-05-13T11:40:15.409Z] 11:40:15     INFO - Confirm whether the browser zoom is set to the default level
[task 2020-05-13T11:40:15.409Z] 11:40:15     INFO - TEST-PASS | browser/modules/test/browser/browser_urlBar_zoom.js | Page zoom is set to default (100%) - 
[task 2020-05-13T11:40:15.409Z] 11:40:15     INFO - Buffered messages finished
[task 2020-05-13T11:40:15.410Z] 11:40:15     INFO - TEST-UNEXPECTED-FAIL | browser/modules/test/browser/browser_urlBar_zoom.js | Zoom reset button is currently hidden - Got false, expected true