Bug: Intermittent browser/components/newtab/test/browser/browser_aboutwelcome_multistage.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: INCOMPLETE
Created: 2021-05-27 01:40:49+00:00
Resolved: 2023-10-20 12:01:50+00:00

**Filed by:** imoraru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=340910208&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Ynjyrxz1R8WPNT3afJI3iw/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/Ynjyrxz1R8WPNT3afJI3iw/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

---
```
[task 2021-05-27T00:46:48.804Z] 00:46:48     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage.js | telemetry.event_counts['normandy#expose#nimbus_experiment'] must contain the expected value - 1 == 1 - 
[task 2021-05-27T00:46:48.804Z] 00:46:48     INFO - Leaving test bound test_multistage_aboutwelcome_experimentAPI
[task 2021-05-27T00:46:48.805Z] 00:46:48     INFO - Entering test bound test_multistage_aboutwelcome_transitions
[task 2021-05-27T00:46:48.805Z] 00:46:48     INFO - Buffered messages logged at 00:46:41
[task 2021-05-27T00:46:48.806Z] 00:46:48     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage.js | Should not render div.proton.transition-out in multistage proton step 1 - true == true - 
[task 2021-05-27T00:46:48.806Z] 00:46:48     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage.js | Navigated to a welcome screen - "about:welcome" == "about:welcome" - 
[task 2021-05-27T00:46:48.806Z] 00:46:48     INFO - Buffered messages finished
[task 2021-05-27T00:46:48.807Z] 00:46:48     INFO - TEST-UNEXPECTED-FAIL | browser/components/newtab/test/browser/browser_aboutwelcome_multistage.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 2021-05-27T00:46:48.808Z] 00:46:48     INFO - Leaving test bound test_multistage_aboutwelcome_transitions
[task 2021-05-27T00:46:48.808Z] 00:46:48     INFO - Entering test bound test_multistage_aboutwelcome_transitions_off
[task 2021-05-27T00:46:48.809Z] 00:46:48     INFO - GECKO(3617) | console.debug: ExperimentManager:
[task 2021-05-27T00:46:48.810Z] 00:46:48     INFO - GECKO(3617) |   Skipping enrollment for "aboutwelcome-experiment-0.8100033237550979" because there is an existing experiment for its feature.
[task 2021-05-27T00:46:49.527Z] 00:46:49     INFO - GECKO(3617) | [Child 3739: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (7f6afab92c00) [pid = 3739] [serial = 258] [outer = 0] [url = about:blank]
[task 2021-05-27T00:46:49.528Z] 00:46:49     INFO - GECKO(3617) | [Child 3739: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (7f6afa395000) [pid = 3739] [serial = 255] [outer = 0] [url = about:welcome]
[task 2021-05-27T00:46:50.378Z] 00:46:50     INFO - GECKO(3617) | [Child 3684: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (7f049cdd0800) [pid = 3684] [serial = 10] [outer = 0] [url = about:blank]
[task 2021-05-27T00:48:04.226Z] 00:48:04     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-05-27T00:48:04.227Z] 00:48:04     INFO - TEST-UNEXPECTED-FAIL | browser/components/newtab/test/browser/browser_aboutwelcome_multistage.js | Test timed out - 
[task 2021-05-27T00:48:04.393Z] 00:48:04     INFO - GECKO(3617) | console.debug: AboutWelcomeParent:
[task 2021-05-27T00:48:04.394Z] 00:48:04     INFO - GECKO(3617) |   Terminate reason is welcome-tab-closed
[task 2021-05-27T00:48:04.506Z] 00:48:04     INFO - GECKO(3617) | console.debug: AboutWelcomeParent:
[task 2021-05-27T00:48:04.507Z] 00:48:04     INFO - GECKO(3617) |   Terminate reason is welcome-tab-closed
[task 2021-05-27T00:48:04.534Z] 00:48:04     INFO - GECKO(3617) | MEMORY STAT | vsize 3334MB | residentFast 551MB | heapAllocated 244MB
[task 2021-05-27T00:48:04.535Z] 00:48:04     INFO - TEST-OK | browser/components/newtab/test/browser/browser_aboutwelcome_multistage.js | took 90328ms
[task 2021-05-27T00:48:04.550Z] 00:48:04     INFO - GECKO(3617) | [Child 3684: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7f049cdcf000 == 1 [pid = 3684] [id = 4]
[task 2021-05-27T00:48:04.552Z] 00:48:04     INFO - GECKO(3617) | [Child 3684: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 1 (7f04b9664200) [pid = 3684] [serial = 11] [outer = 0]
[task 2021-05-27T00:48:04.552Z] 00:48:04     INFO - GECKO(3617) | [Child 3684: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (7f049cdd0800) [pid = 3684] [serial = 12] [outer = 7f04b9664200]
[task 2021-05-27T00:48:04.647Z] 00:48:04     INFO - checking window state
[task 2021-05-27T00:48:04.764Z] 00:48:04     INFO - TEST-START | browser/components/newtab/test/browser/browser_aboutwelcome_multistage.js
```