Bug: Intermittent TV-fis browser/components/newtab/test/browser/browser_aboutwelcome_multistage_languageSwitcher.js | Uncaught exception in test - Should render .screen-2 in Language changed - timed out after 50 tries.
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2022-04-14 03:20:35+00:00
Resolved: 2022-07-25 23:18:23+00:00

**Filed by:** imoraru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=374435657&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/FoIpEPoKTFeiLOTSXEp-iQ/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/FoIpEPoKTFeiLOTSXEp-iQ/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

---
```
[task 2022-04-14T01:27:20.092Z] 01:27:20     INFO - TEST-START | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_languageSwitcher.js
[task 2022-04-14T01:27:20.140Z] 01:27:20     INFO - GECKO(4696) | [Child 6696: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 128e8084800 == 11 [pid = 6696] [id = 10]
[task 2022-04-14T01:27:20.141Z] 01:27:20     INFO - GECKO(4696) | [Child 6696: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 24 (128e823f180) [pid = 6696] [serial = 31] [outer = 0]
[task 2022-04-14T01:27:20.142Z] 01:27:20     INFO - GECKO(4696) | [Child 6696: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 25 (128e8086c00) [pid = 6696] [serial = 32] [outer = 128e823f180]
[task 2022-04-14T01:27:20.154Z] 01:27:20     INFO - GECKO(4696) | [Child 6696: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 26 (128e82a2000) [pid = 6696] [serial = 33] [outer = 128e823f180]
[task 2022-04-14T01:27:20.176Z] 01:27:20     INFO - GECKO(4696) | console.debug: AboutWelcomeChild:
[task 2022-04-14T01:27:20.177Z] 01:27:20     INFO - GECKO(4696) |   Received page event DOMDocElementInserted
[task 2022-04-14T01:27:20.238Z] 01:27:20     INFO - GECKO(4696) | console.debug: AboutWelcomeParent:
[task 2022-04-14T01:27:20.241Z] 01:27:20     INFO - GECKO(4696) |   Received content event: AWPage:GET_ATTRIBUTION_DATA
[task 2022-04-14T01:27:20.250Z] 01:27:20     INFO - GECKO(4696) | console.debug: AboutWelcomeChild:
[task 2022-04-14T01:27:20.250Z] 01:27:20     INFO - GECKO(4696) |   Loading about:welcome with no experiment
<...>
[task 2022-04-14T01:27:28.214Z] 01:27:28     INFO - GECKO(4696) | [Child 1224: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 2420751dc00 == 0 [pid = 1224] [id = 0] [url = about:blank]
[task 2022-04-14T01:27:29.363Z] 01:27:29     INFO - TEST-INFO | started process screenshot
[task 2022-04-14T01:27:29.479Z] 01:27:29     INFO - TEST-INFO | screenshot: exit 0
[task 2022-04-14T01:27:29.486Z] 01:27:29     INFO - Buffered messages logged at 01:27:20
[task 2022-04-14T01:27:29.487Z] 01:27:29     INFO - Entering test bound initSandbox
[task 2022-04-14T01:27:29.487Z] 01:27:29     INFO - Leaving test bound initSandbox
[task 2022-04-14T01:27:29.488Z] 01:27:29     INFO - Entering test bound test_aboutwelcome_languageSwitcher_accept
[task 2022-04-14T01:27:29.488Z] 01:27:29     INFO - Mocking LangPackMatcher.jsm APIs
[task 2022-04-14T01:27:29.489Z] 01:27:29     INFO - Opening about:welcome
[task 2022-04-14T01:27:29.489Z] 01:27:29     INFO - Requesting which langpacks are available for download
[task 2022-04-14T01:27:29.490Z] 01:27:29     INFO - Clicking the primary button to start the onboarding process.
[task 2022-04-14T01:27:29.490Z] 01:27:29     INFO - Buffered messages logged at 01:27:22
[task 2022-04-14T01:27:29.491Z] 01:27:29     INFO - Resolving which langpacks are available for download: ["es-MX","es-ES","fr-FR"]
[task 2022-04-14T01:27:29.491Z] 01:27:29     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_languageSwitcher.js | Should not render button[disabled] [data-l10n-id="onboarding-live-language-waiting-button"] in Live language switching, asking for a language - true == true - 
[task 2022-04-14T01:27:29.492Z] 01:27:29     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_languageSwitcher.js | Should not render [data-l10n-id="onboarding-live-language-skip-button-label"] in Live language switching, asking for a language - true == true - 
[task 2022-04-14T01:27:29.492Z] 01:27:29     INFO - Clicking the primary button to view language switching page.
[task 2022-04-14T01:27:29.493Z] 01:27:29     INFO - Buffered messages logged at 01:27:23
[task 2022-04-14T01:27:29.494Z] 01:27:29     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_languageSwitcher.js | Should not render button[disabled] [data-l10n-id="onboarding-live-language-waiting-button"] in Live language switching, waiting for langpack to download - true == true - 
[task 2022-04-14T01:27:29.494Z] 01:27:29     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_languageSwitcher.js | Telemetry events match - 
[task 2022-04-14T01:27:29.495Z] 01:27:29     INFO - LangPack install finished.
[task 2022-04-14T01:27:29.495Z] 01:27:29     INFO - Buffered messages finished
[task 2022-04-14T01:27:29.496Z] 01:27:29     INFO - TEST-UNEXPECTED-FAIL | browser/components/newtab/test/browser/browser_aboutwelcome_multistage_languageSwitcher.js | Uncaught exception in test - Should render .screen-2 in Language changed - timed out after 50 tries.
[task 2022-04-14T01:27:29.496Z] 01:27:29     INFO - Leaving test bound test_aboutwelcome_languageSwitcher_accept
```