Bug: Intermittent browser/components/sessionstore/test/browser_1284886_suspend_tab.js | Test timed out -
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2022-05-25 19:38:27+00:00
Resolved: 2022-06-21 17:04:59+00:00

**Filed by:** ctuns [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=379277862&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/fTXYtMWrS5eq_lH3sNSJDQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2022-05-25T18:23:28.085Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1284886_suspend_tab.js | can suspend a tab with beforeunload handler which would not show a prompt - 
[task 2022-05-25T18:23:28.085Z] 18:23:28     INFO - Buffered messages finished
[task 2022-05-25T18:23:28.085Z] 18:23:28     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_1284886_suspend_tab.js | Test timed out - 
[task 2022-05-25T18:23:28.085Z] 18:23:28     INFO - GECKO(5191) | MEMORY STAT | vsize 402261MB | residentFast 328MB | heapAllocated 118MB
[task 2022-05-25T18:23:28.085Z] 18:23:28     INFO - TEST-OK | browser/components/sessionstore/test/browser_1284886_suspend_tab.js | took 45099ms
[task 2022-05-25T18:23:28.085Z] 18:23:28     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-05-25T18:23:28.085Z] 18:23:28     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_1284886_suspend_tab.js | Found a tab after previous test timed out: about:robots - 
[task 2022-05-25T18:23:28.086Z] 18:23:28     INFO - checking window state
[task 2022-05-25T18:23:28.086Z] 18:23:28     INFO - TEST-START | browser/components/sessionstore/test/browser_1446343-windowsize.js
[task 2022-05-25T18:23:28.099Z] 18:23:28     INFO - GECKO(5191) | 1653503008099	Marionette	TRACE	Received observer notification browser-delayed-startup-finished
[task 2022-05-25T18:23:28.102Z] 18:23:28     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-05-25T18:23:28.102Z] 18:23:28     INFO - Buffered messages logged at 18:23:27
[task 2022-05-25T18:23:28.103Z] 18:23:28     INFO - Entering test bound test
[task 2022-05-25T18:23:28.103Z] 18:23:28     INFO - Buffered messages finished
[task 2022-05-25T18:23:28.103Z] 18:23:28     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_1284886_suspend_tab.js | Uncaught exception received from previously timed out test - at chrome://mochitests/content/browser/browser/components/sessionstore/test/browser_1284886_suspend_tab.js:89 - TypeError: can't access property "switchTab", BrowserTestUtils is null
[task 2022-05-25T18:23:28.103Z] 18:23:28     INFO - Stack trace:
[task 2022-05-25T18:23:28.103Z] 18:23:28     INFO - test@chrome://mochitests/content/browser/browser/components/sessionstore/test/browser_1284886_suspend_tab.js:89:3
[task 2022-05-25T18:23:28.103Z] 18:23:28     INFO - GECKO(5191) | JavaScript error: chrome://mochikit/content/browser-test.js, line 1052: TypeError: can't access property "shift", currentScope.__tasks is null
[task 2022-05-25T18:23:28.103Z] 18:23:28     INFO - Console message: [JavaScript Error: "TypeError: can't access property "shift", currentScope.__tasks is null" {file: "chrome://mochikit/content/browser-test.js" line: 1052}]
[task 2022-05-25T18:23:28.106Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | width should match on normal mode - 
[task 2022-05-25T18:23:28.106Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | height should match on normal mode - 
[task 2022-05-25T18:23:28.106Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | screenX should match on normal mode - 
[task 2022-05-25T18:23:28.106Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | screenY should match on normal mode - 
[task 2022-05-25T18:23:28.106Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | sizemode should match - 
[task 2022-05-25T18:23:28.492Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | width should match on maximized mode - 
[task 2022-05-25T18:23:28.493Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | height should match on maximized mode - 
[task 2022-05-25T18:23:28.494Z] 18:23:28     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | sizemode should match - 
[task 2022-05-25T18:23:29.107Z] 18:23:29     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | width should match on minimized mode - 
[task 2022-05-25T18:23:29.107Z] 18:23:29     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | height should match on minimized mode - 
[task 2022-05-25T18:23:29.108Z] 18:23:29     INFO - TEST-PASS | browser/components/sessionstore/test/browser_1446343-windowsize.js | sizemode should match - 
[task 2022-05-25T18:23:29.127Z] 18:23:29     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-05-25T18:23:29.128Z] 18:23:29     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_1446343-windowsize.js | A promise chain failed to handle a rejection: can't access property "shift", currentScope.__tasks is null - stack: _runTaskBasedTest@chrome://mochikit/content/browser-test.js:1052:13
[task 2022-05-25T18:23:29.128Z] 18:23:29     INFO - Rejection date: Wed May 25 2022 18:23:28 GMT+0000 (Greenwich Mean Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 271
[task 2022-05-25T18:23:29.128Z] 18:23:29     INFO - Stack trace:
[task 2022-05-25T18:23:29.128Z] 18:23:29     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:271
[task 2022-05-25T18:23:29.128Z] 18:23:29     INFO - chrome://mochikit/content/browser-test.js:handleTask:1017
[task 2022-05-25T18:23:29.129Z] 18:23:29     INFO - Leaving test bound test
[task 2022-05-25T18:23:29.129Z] 18:23:29     INFO - GECKO(5191) | MEMORY STAT | vsize 410479MB | residentFast 332MB | heapAllocated 125MB
[task 2022-05-25T18:23:29.129Z] 18:23:29     INFO - TEST-OK | browser/components/sessionstore/test/browser_1446343-windowsize.js | took 1135ms
[task 2022-05-25T18:23:29.137Z] 18:23:29     INFO - checking window state
[task 2022-05-25T18:23:29.141Z] 18:23:29     INFO - TEST-START | browser/components/sessionstore/test/browser_339445.js
```