Bug: Intermittent browser/components/sessionstore/test/browser_586147.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2024-05-16 12:26:26+00:00
Resolved: 2024-06-14 12:02:36+00:00

**Filed by:** ctuns [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=458425788&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/fhNVOdAyQCC0liLLKxMAVQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2024-05-16T11:21:24.092Z] 11:21:24     INFO - TEST-PASS | browser/components/sessionstore/test/browser_586147.js | third tab is now hidden - 
[task 2024-05-16T11:21:24.093Z] 11:21:24     INFO - Buffered messages finished
[task 2024-05-16T11:21:24.095Z] 11:21:24     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_586147.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 2024-05-16T11:21:24.095Z] 11:21:24     INFO - Stack trace:
[task 2024-05-16T11:21:24.095Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:607
[task 2024-05-16T11:21:24.095Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:nextTest:776
[task 2024-05-16T11:21:24.096Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1806
[task 2024-05-16T11:21:24.096Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:run:1726
[task 2024-05-16T11:21:24.097Z] 11:21:24     INFO - Not taking screenshot here: see the one that was previously logged
[task 2024-05-16T11:21:24.100Z] 11:21:24     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_586147.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 2024-05-16T11:21:24.100Z] 11:21:24     INFO - Stack trace:
[task 2024-05-16T11:21:24.100Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:608
[task 2024-05-16T11:21:24.100Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:nextTest:776
[task 2024-05-16T11:21:24.100Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1806
[task 2024-05-16T11:21:24.101Z] 11:21:24     INFO - chrome://mochikit/content/browser-test.js:run:1726
[task 2024-05-16T11:21:24.101Z] 11:21:24     INFO - GECKO(9824) | MEMORY STAT | vsize 2104764MB | vsizeMaxContiguous 67103143MB | residentFast 449MB | heapAllocated 121MB
[task 2024-05-16T11:21:24.102Z] 11:21:24     INFO - TEST-OK | browser/components/sessionstore/test/browser_586147.js | took 5669ms
```