Bug: Intermittent browser/components/sessionstore/test/browser_cleaner.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2024-05-02 00:17:20+00:00
Resolved: 2024-06-07 12:03:40+00:00

**Filed by:** nfay [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=456602248&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Lf5c_C_BRd6FURgO0J87dg/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2024-05-01T23:42:57.201Z] 23:42:57     INFO - TEST-PASS | browser/components/sessionstore/test/browser_cleaner.js | 5. Second window was forgotten - 
[task 2024-05-01T23:42:57.202Z] 23:42:57     INFO - TEST-PASS | browser/components/sessionstore/test/browser_cleaner.js | 5. Only one closed tab left - 
[task 2024-05-01T23:42:57.202Z] 23:42:57     INFO - TEST-PASS | browser/components/sessionstore/test/browser_cleaner.js | 5. The second tab is still here - 
[task 2024-05-01T23:42:57.203Z] 23:42:57     INFO - Cleaning up browser
[task 2024-05-01T23:42:57.203Z] 23:42:57     INFO - running 
[task 2024-05-01T23:42:57.204Z] 23:42:57     INFO - Leaving test bound test_cleanup
[task 2024-05-01T23:42:57.204Z] 23:42:57     INFO - Buffered messages finished
[task 2024-05-01T23:42:57.208Z] 23:42:57     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_cleaner.js | waiting for vsync to be disabled - timed out after 50 tries. - false == true - {"filename":"chrome://mochikit/content/browser-test.js","name":"ensureVsyncDisabled","sourceId":586,"lineNumber":607,"columnNumber":19,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"nextTest","sourceId":586,"lineNumber":776,"columnNumber":18,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"testScope/test_finish/<","sourceId":586,"lineNumber":1806,"columnNumber":25,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/browser-test.js","name":"run","sourceId":586,"lineNumber":1726,"columnNumber":9,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":null,"formattedStack":"run@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}},"formattedStack":"async*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1806:25\nrun@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"async*nextTest@chrome://mochikit/content/browser-test.js:776:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1806:25\nrun@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"ensureVsyncDisabled@chrome://mochikit/content/browser-test.js:607:19\nasync*nextTest@chrome://mochikit/content/browser-test.js:776:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1806:25\nrun@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}}
[task 2024-05-01T23:42:57.208Z] 23:42:57     INFO - Stack trace:
[task 2024-05-01T23:42:57.208Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:607
[task 2024-05-01T23:42:57.208Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:nextTest:776
[task 2024-05-01T23:42:57.209Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1806
[task 2024-05-01T23:42:57.209Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:run:1726
[task 2024-05-01T23:42:57.209Z] 23:42:57     INFO - Not taking screenshot here: see the one that was previously logged
[task 2024-05-01T23:42:57.213Z] 23:42:57     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_cleaner.js | vsync remained enabled at the end of the test. Is there an animation still running? Consider talking to the performance team for tips to solve this. - false == true - {"filename":"chrome://mochikit/content/browser-test.js","name":"ensureVsyncDisabled","sourceId":586,"lineNumber":608,"columnNumber":19,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"nextTest","sourceId":586,"lineNumber":776,"columnNumber":18,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"testScope/test_finish/<","sourceId":586,"lineNumber":1806,"columnNumber":25,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/browser-test.js","name":"run","sourceId":586,"lineNumber":1726,"columnNumber":9,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":null,"formattedStack":"run@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}},"formattedStack":"async*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1806:25\nrun@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"async*nextTest@chrome://mochikit/content/browser-test.js:776:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1806:25\nrun@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"ensureVsyncDisabled@chrome://mochikit/content/browser-test.js:608:19\nasync*nextTest@chrome://mochikit/content/browser-test.js:776:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1806:25\nrun@chrome://mochikit/content/browser-test.js:1726:9\n","nativeSavedFrame":{}}
[task 2024-05-01T23:42:57.213Z] 23:42:57     INFO - Stack trace:
[task 2024-05-01T23:42:57.213Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:608
[task 2024-05-01T23:42:57.213Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:nextTest:776
[task 2024-05-01T23:42:57.214Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1806
[task 2024-05-01T23:42:57.214Z] 23:42:57     INFO - chrome://mochikit/content/browser-test.js:run:1726
[task 2024-05-01T23:42:57.214Z] 23:42:57     INFO - GECKO(9604) | MEMORY STAT | vsize 19414414MB | vsizeMaxContiguous 67935449MB | residentFast 1146MB
[task 2024-05-01T23:42:57.215Z] 23:42:57     INFO - TEST-OK | browser/components/sessionstore/test/browser_cleaner.js | took 25995ms
[task 2024-05-01T23:42:57.216Z] 23:42:57     INFO - checking window state
[task 2024-05-01T23:42:57.216Z] 23:42:57     INFO - TEST-START | browser/components/sessionstore/test/browser_closedId.js
```