Bug: Intermittent browser/components/newtab/test/browser/browser_aboutwelcome_multistage_experimentAPI.js | Uncaught exception - Should render div.proton.transition-out .screen-0 in multistage proton step 1 transition to 2 - timed out after 50 tries.
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2021-07-20 19:27:24+00:00
Resolved: 2022-07-25 23:18:16+00:00

**Filed by:** smolnar [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=345773210&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/XHaSxW-sQWqBXZKhsjlV9Q/runs/0/artifacts/public/logs/live_backing.log
**Reftest URL:** https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/XHaSxW-sQWqBXZKhsjlV9Q/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

---
```
INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_experimentAPI.js | Navigated to a welcome screen - "about:welcome" == "about:welcome" - 
[task 2021-07-20T18:13:37.708Z] 18:13:37     INFO - Buffered messages finished
[task 2021-07-20T18:13:37.709Z] 18:13:37     INFO - TEST-UNEXPECTED-FAIL | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_experimentAPI.js | Uncaught exception - Should render div.proton.transition-out .screen-0 in multistage proton step 1 transition to 2 - timed out after 50 tries.
[task 2021-07-20T18:13:37.709Z] 18:13:37     INFO - Leaving test bound test_multistage_aboutwelcome_transitions
[task 2021-07-20T18:13:37.709Z] 18:13:37     INFO - Entering test bound test_multistage_aboutwelcome_transitions_off
[task 2021-07-20T18:13:37.709Z] 18:13:37     INFO - GECKO(14545) | console.debug: ExperimentManager:
[task 2021-07-20T18:13:37.709Z] 18:13:37     INFO - GECKO(14545) |   Skipping enrollment for "aboutwelcome-experiment-0.8267704810411921" because there is an existing experiment for its feature.
[task 2021-07-20T18:13:38.199Z] 18:13:38     INFO - GECKO(14545) | [Child 14677: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (7f96e60e2800) [pid = 14677] [serial = 12] [outer = 0] [url = about:blank]
[task 2021-07-20T18:13:38.199Z] 18:13:38     INFO - GECKO(14545) | [Child 14677: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (7f96e86ed000) [pid = 14677] [serial = 9] [outer = 0] [url = about:welcome]
[task 2021-07-20T18:14:53.631Z] 18:14:53     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-07-20T18:14:53.631Z] 18:14:53     INFO - TEST-UNEXPECTED-FAIL | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_experimentAPI.js | Test timed out - 
[task 2021-07-20T18:14:53.787Z] 18:14:53     INFO - GECKO(14545) | console.debug: AboutWelcomeParent:
[task 2021-07-20T18:14:53.789Z] 18:14:53     INFO - GECKO(14545) |   Terminate reason is welcome-tab-closed
[task 2021-07-20T18:14:53.820Z] 18:14:53     INFO - GECKO(14545) | MEMORY STAT vsizeMaxContiguous not supported in this build configuration.
[task 2021-07-20T18:14:53.821Z] 18:14:53     INFO - GECKO(14545) | MEMORY STAT | vsize 3313MB | residentFast 529MB | heapAllocated 231MB
[task 2021-07-20T18:14:53.823Z] 18:14:53     INFO - TEST-OK | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_experimentAPI.js | took 90484ms
```