Bug: Intermittent browser/components/sessionstore/test/browser_491577.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2023-12-06 11:33:00+00:00
Resolved: 2024-01-05 12:01:34+00:00

**Filed by:** nfay [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=439018334&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/e-oX7mAoTZqOMST6vFOIKg/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2023-12-06T10:33:35.066Z] 10:33:35     INFO - TEST-START | browser/components/sessionstore/test/browser_491577.js
[task 2023-12-06T10:33:35.273Z] 10:33:35     INFO - GECKO(8116) | 1701858815273	Marionette	TRACE	Received observer notification browser-delayed-startup-finished
[task 2023-12-06T10:33:35.311Z] 10:33:35     INFO - GECKO(8116) | console.error:
[task 2023-12-06T10:33:35.313Z] 10:33:35     INFO - GECKO(8116) |   Message: TypeError: error loading dynamically imported module: chrome://global/content/elements/moz-button-group.mjs
[task 2023-12-06T10:33:35.334Z] 10:33:35     INFO - GECKO(8116) | [GFX1-]: Failed to connect WebRenderBridgeChild. isParent=false
[task 2023-12-06T10:33:40.845Z] 10:33:40     INFO - TEST-INFO | started process screenshot
[task 2023-12-06T10:33:42.405Z] 10:33:42     INFO - TEST-INFO | screenshot: exit 0
[task 2023-12-06T10:33:42.406Z] 10:33:42     INFO - Buffered messages logged at 10:33:35
[task 2023-12-06T10:33:42.407Z] 10:33:42     INFO - Entering test bound test_deleteClosedWindow
[task 2023-12-06T10:33:42.407Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | Closed window list has the expected length - 
[task 2023-12-06T10:33:42.408Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | The correct amount of windows are to be forgotten - 
[task 2023-12-06T10:33:42.408Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | Everything is set up. - 
[task 2023-12-06T10:33:42.409Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | Invalid window for forgetClosedWindow throws - 
[task 2023-12-06T10:33:42.409Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | Invalid window for forgetClosedWindow throws - 
[task 2023-12-06T10:33:42.410Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | The correct amount of windows were removed - 
[task 2023-12-06T10:33:42.411Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | All windows specifically forgotten were indeed removed - 
[task 2023-12-06T10:33:42.412Z] 10:33:42     INFO - TEST-PASS | browser/components/sessionstore/test/browser_491577.js | ... and windows not specifically forgetten weren't. - 
[task 2023-12-06T10:33:42.412Z] 10:33:42     INFO - Leaving test bound test_deleteClosedWindow
[task 2023-12-06T10:33:42.413Z] 10:33:42     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source �chrome://global/content/elements/moz-button-group.mjs�." {file: "chrome://browser/content/browser.xhtml" line: 0}]
[task 2023-12-06T10:33:42.413Z] 10:33:42     INFO - Console message: [JavaScript Warning: "Loading failed for the module with source �chrome://global/content/elements/moz-toggle.mjs�." {file: "chrome://browser/content/browser.xhtml" line: 0}]
[task 2023-12-06T10:33:42.414Z] 10:33:42     INFO - Buffered messages finished
[task 2023-12-06T10:33:42.418Z] 10:33:42     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_491577.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":606,"columnNumber":19,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"nextTest","sourceId":586,"lineNumber":775,"columnNumber":18,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"testScope/test_finish/<","sourceId":586,"lineNumber":1805,"columnNumber":25,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/browser-test.js","name":"run","sourceId":586,"lineNumber":1725,"columnNumber":9,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":null,"formattedStack":"run@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}},"formattedStack":"async*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1805:25\nrun@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"async*nextTest@chrome://mochikit/content/browser-test.js:775:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1805:25\nrun@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"ensureVsyncDisabled@chrome://mochikit/content/browser-test.js:606:19\nasync*nextTest@chrome://mochikit/content/browser-test.js:775:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1805:25\nrun@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}}
[task 2023-12-06T10:33:42.418Z] 10:33:42     INFO - Stack trace:
[task 2023-12-06T10:33:42.418Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:606
[task 2023-12-06T10:33:42.418Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:nextTest:775
[task 2023-12-06T10:33:42.418Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1805
[task 2023-12-06T10:33:42.418Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:run:1725
[task 2023-12-06T10:33:42.418Z] 10:33:42     INFO - Not taking screenshot here: see the one that was previously logged
[task 2023-12-06T10:33:42.421Z] 10:33:42     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_491577.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":607,"columnNumber":19,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"nextTest","sourceId":586,"lineNumber":775,"columnNumber":18,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"testScope/test_finish/<","sourceId":586,"lineNumber":1805,"columnNumber":25,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/browser-test.js","name":"run","sourceId":586,"lineNumber":1725,"columnNumber":9,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":null,"formattedStack":"run@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}},"formattedStack":"async*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1805:25\nrun@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"async*nextTest@chrome://mochikit/content/browser-test.js:775:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1805:25\nrun@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"ensureVsyncDisabled@chrome://mochikit/content/browser-test.js:607:19\nasync*nextTest@chrome://mochikit/content/browser-test.js:775:18\nasync*testScope/test_finish/<@chrome://mochikit/content/browser-test.js:1805:25\nrun@chrome://mochikit/content/browser-test.js:1725:9\n","nativeSavedFrame":{}}
[task 2023-12-06T10:33:42.421Z] 10:33:42     INFO - Stack trace:
[task 2023-12-06T10:33:42.421Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:607
[task 2023-12-06T10:33:42.421Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:nextTest:775
[task 2023-12-06T10:33:42.421Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1805
[task 2023-12-06T10:33:42.422Z] 10:33:42     INFO - chrome://mochikit/content/browser-test.js:run:1725
[task 2023-12-06T10:33:42.423Z] 10:33:42     INFO - GECKO(8116) | MEMORY STAT | vsize 2112730MB | vsizeMaxContiguous 65167107MB | residentFast 405MB | heapAllocated 148MB
[task 2023-12-06T10:33:42.423Z] 10:33:42     INFO - TEST-OK | browser/components/sessionstore/test/browser_491577.js | took 5795ms
[task 2023-12-06T10:33:42.424Z] 10:33:42     INFO - checking window state
[task 2023-12-06T10:33:42.424Z] 10:33:42     INFO - TEST-START | browser/components/sessionstore/test/browser_495495.js
```