Bug: Intermittent toolkit/components/thumbnails/test/browser_thumbnails_expiration.js | Uncaught exception in test - Error: Could not stat file(/tmp/tmpwek39vfp.mozrunner/thumbnails/e6920ad69fa373c80a75ecb113a42427.png) because it does not exist
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2022-04-20 11:12:35+00:00
Resolved: 2022-07-25 23:14:12+00:00

**Filed by:** ccozmuta [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=375120586&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/cV9UPEAEQDWGmKCBFp-cNg/runs/0/artifacts/public/logs/live_backing.log

---
```
task 2022-04-20T10:40:34.194Z] 10:40:34     INFO - TEST-START | toolkit/components/thumbnails/test/browser_thumbnails_expiration.js
[task 2022-04-20T10:40:34.270Z] 10:40:34     INFO - TEST-INFO | started process screentopng
[task 2022-04-20T10:40:34.725Z] 10:40:34     INFO - TEST-INFO | screentopng: exit 0
[task 2022-04-20T10:40:34.730Z] 10:40:34     INFO - Buffered messages logged at 10:40:34
[task 2022-04-20T10:40:34.731Z] 10:40:34     INFO - Entering test bound thumbnails_expiration
[task 2022-04-20T10:40:34.731Z] 10:40:34     INFO - Creating dummy thumbnail for http://mochi.test:8888/?t=1650451234201#1
[task 2022-04-20T10:40:34.732Z] 10:40:34     INFO - TEST-PASS | toolkit/components/thumbnails/test/browser_thumbnails_expiration.js | first thumbnail created - 
[task 2022-04-20T10:40:34.732Z] 10:40:34     INFO - Creating dummy thumbnail for http://mochi.test:8888/?t=1650451234201#2
[task 2022-04-20T10:40:34.732Z] 10:40:34     INFO - TEST-PASS | toolkit/components/thumbnails/test/browser_thumbnails_expiration.js | second thumbnail created - 
[task 2022-04-20T10:40:34.733Z] 10:40:34     INFO - Creating dummy thumbnail for http://mochi.test:8888/?t=1650451234201#3
[task 2022-04-20T10:40:34.733Z] 10:40:34     INFO - TEST-PASS | toolkit/components/thumbnails/test/browser_thumbnails_expiration.js | third thumbnail created - 
[task 2022-04-20T10:40:34.733Z] 10:40:34     INFO - Buffered messages finished
[task 2022-04-20T10:40:34.733Z] 10:40:34     INFO - TEST-UNEXPECTED-FAIL | toolkit/components/thumbnails/test/browser_thumbnails_expiration.js | Uncaught exception in test - Error: Could not stat file(/tmp/tmpwek39vfp.mozrunner/thumbnails/e6920ad69fa373c80a75ecb113a42427.png) because it does not exist
[task 2022-04-20T10:40:34.733Z] 10:40:34     INFO - Stack trace:
[task 2022-04-20T10:40:34.734Z] 10:40:34     INFO - DOMException@resource://gre/modules/PromiseWorker.jsm:106:18
[task 2022-04-20T10:40:34.734Z] 10:40:34     INFO - postMessage@resource://gre/modules/PromiseWorker.jsm:342:55
[task 2022-04-20T10:40:34.740Z] 10:40:34     INFO - Leaving test bound thumbnails_expiration
[task 2022-04-20T10:40:34.741Z] 10:40:34     INFO - GECKO(18505) | MEMORY STAT | vsize 11277MB | residentFast 437MB | heapAllocated 189MB
[task 2022-04-20T10:40:34.743Z] 10:40:34     INFO - TEST-OK | toolkit/components/thumbnails/test/browser_thumbnails_expiration.js | took 85ms
[task 2022-04-20T10:40:34.744Z] 10:40:34     INFO - GECKO(18505) | [Child 18703: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7f6877019400 == 3 [pid = 18703] [id = 14]
[task 2022-04-20T10:40:34.746Z] 10:40:34     INFO - GECKO(18505) | [Child 18703: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 9 (7f6893696130) [pid = 18703] [serial = 36] [outer = 0]
[task 2022-04-20T10:40:34.747Z] 10:40:34     INFO - GECKO(18505) | [Child 18703: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 10 (7f6877019c00) [pid = 18703] [serial = 37] [outer = 7f6893696130]
[task 2022-04-20T10:40:34.748Z] 10:40:34     INFO - checking window state
[task 2022-04-20T10:40:34.749Z] 10:40:34     INFO - TEST-START | toolkit/components/thumbnails/test/browser_thumbnails_fullViewport.js
```