Bug: Intermittent browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2024-09-16 19:26:14+00:00
Resolved: 2025-02-17 12:02:12+00:00

**Filed by:** imoraru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=474510204&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Y0qeUcpRQGaGKBKy8F8emQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2024-09-16T17:39:40.755Z] 17:39:40     INFO - TEST-START | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.js
[task 2024-09-16T17:39:40.978Z] 17:39:40     INFO - GECKO(8256) | JavaScript warning: resource://gre/modules/Troubleshoot.sys.mjs, line 766: WebGL context was lost.
[task 2024-09-16T17:39:40.980Z] 17:39:40     INFO - GECKO(8256) | JavaScript warning: resource://gre/modules/Troubleshoot.sys.mjs, line 733: WebGL warning: <Create>: AllowWebgl2:false restricts context creation on this system.
[task 2024-09-16T17:39:40.981Z] 17:39:40     INFO - GECKO(8256) | JavaScript warning: resource://gre/modules/Troubleshoot.sys.mjs, line 733: Failed to create WebGL context: WebGL creation failed:
[task 2024-09-16T17:39:40.981Z] 17:39:40     INFO - GECKO(8256) | * AllowWebgl2:false restricts context creation on this system. ()
[task 2024-09-16T17:39:47.641Z] 17:39:47     INFO - TEST-INFO | started process screenshot
[task 2024-09-16T17:39:56.601Z] 17:39:56     INFO - TEST-INFO | screenshot: exit 0
[task 2024-09-16T17:39:56.601Z] 17:39:56     INFO - Buffered messages logged at 17:39:40
[task 2024-09-16T17:39:56.602Z] 17:39:56     INFO - Entering test bound 
[task 2024-09-16T17:39:56.602Z] 17:39:56     INFO - Buffered messages logged at 17:39:41
[task 2024-09-16T17:39:56.603Z] 17:39:56     INFO - Console message: [JavaScript Warning: "WebGL context was lost." {file: "resource://gre/modules/Troubleshoot.sys.mjs" line: 766}]
[task 2024-09-16T17:39:56.603Z] 17:39:56     INFO - Console message: [JavaScript Warning: "WebGL warning: <Create>: AllowWebgl2:false restricts context creation on this system." {file: "resource://gre/modules/Troubleshoot.sys.mjs" line: 733}]
[task 2024-09-16T17:39:56.604Z] 17:39:56     INFO - Console message: [JavaScript Warning: "Failed to create WebGL context: WebGL creation failed: 
[task 2024-09-16T17:39:56.604Z] 17:39:56     INFO - * AllowWebgl2:false restricts context creation on this system. ()" {file: "resource://gre/modules/Troubleshoot.sys.mjs" line: 733}]
[task 2024-09-16T17:39:56.605Z] 17:39:56     INFO - Console message: [JavaScript Warning: "This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use �<!DOCTYPE html>�." {file: "data:text/html,Goodbye" line: 0}]
[task 2024-09-16T17:39:56.606Z] 17:39:56     INFO - Buffered messages logged at 17:39:42
[task 2024-09-16T17:39:56.607Z] 17:39:56     INFO - TEST-PASS | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.js | url is selected - 
[task 2024-09-16T17:39:56.608Z] 17:39:56     INFO - TEST-PASS | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.js | url is selected - 
[task 2024-09-16T17:39:56.609Z] 17:39:56     INFO - TEST-PASS | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.js | urlbar is focused - 
[task 2024-09-16T17:39:56.609Z] 17:39:56     INFO - Leaving test bound 
[task 2024-09-16T17:39:56.610Z] 17:39:56     INFO - Buffered messages finished
[task 2024-09-16T17:39:56.611Z] 17:39:56     INFO - TEST-UNEXPECTED-FAIL | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.js | waiting for vsync to be disabled - timed out after 50 tries. - false == true - 
[task 2024-09-16T17:39:56.611Z] 17:39:56     INFO - Stack trace:
[task 2024-09-16T17:39:56.611Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:607
[task 2024-09-16T17:39:56.611Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:nextTest:782
[task 2024-09-16T17:39:56.611Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1811
[task 2024-09-16T17:39:56.611Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:run:1731
[task 2024-09-16T17:39:56.612Z] 17:39:56     INFO - Not taking screenshot here: see the one that was previously logged
[task 2024-09-16T17:39:56.613Z] 17:39:56     INFO - TEST-UNEXPECTED-FAIL | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.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 - 
[task 2024-09-16T17:39:56.613Z] 17:39:56     INFO - Stack trace:
[task 2024-09-16T17:39:56.613Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:ensureVsyncDisabled:608
[task 2024-09-16T17:39:56.613Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:nextTest:782
[task 2024-09-16T17:39:56.613Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:testScope/test_finish/<:1811
[task 2024-09-16T17:39:56.613Z] 17:39:56     INFO - chrome://mochikit/content/browser-test.js:run:1731
[task 2024-09-16T17:39:56.614Z] 17:39:56     INFO - GECKO(8256) | MEMORY STAT | vsize 2121087MB | vsizeMaxContiguous 65360377MB | residentFast 587MB | heapAllocated 289MB
[task 2024-09-16T17:39:56.614Z] 17:39:56     INFO - TEST-OK | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_select.js | took 6913ms
[task 2024-09-16T17:39:56.615Z] 17:39:56     INFO - checking window state
[task 2024-09-16T17:39:56.615Z] 17:39:56     INFO - TEST-START | browser/components/tabbrowser/test/browser/tabs/browser_tabswitch_updatecommands.js
```