Bug: Intermittent browser/components/sessionstore/test/browser_async_duplicate_tab.js | there are two shistory entries - Got 3, expected 2
Status: REOPENED
Priority: P5
Created: 2021-03-30 01:31:32+00:00
Resolved: 2021-07-12 06:15:48+00:00

**Filed by:** malexandru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=334836684&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Qlsr-MUwSSSTjx6lqP3cdQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-03-29T23:26:52.626Z] 23:26:52     INFO - TEST-OK | browser/components/sessionstore/test/browser_aboutSessionRestore.js | took 501ms
[task 2021-03-29T23:26:52.654Z] 23:26:52     INFO - checking window state
[task 2021-03-29T23:26:52.674Z] 23:26:52     INFO - TEST-START | browser/components/sessionstore/test/browser_async_duplicate_tab.js
[task 2021-03-29T23:26:53.168Z] 23:26:53     INFO - TEST-INFO | started process screentopng
[task 2021-03-29T23:26:53.468Z] 23:26:53     INFO - TEST-INFO | screentopng: exit 0
[task 2021-03-29T23:26:53.468Z] 23:26:53     INFO - Buffered messages logged at 23:26:52
[task 2021-03-29T23:26:53.468Z] 23:26:53     INFO - Entering test bound test_duplicate
[task 2021-03-29T23:26:53.468Z] 23:26:53     INFO - Console message: [JavaScript Error: "The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol." {file: "http://example.com/browser/browser/components/sessionstore/test/file_async_duplicate_tab.html" line: 0}]
[task 2021-03-29T23:26:53.468Z] 23:26:53     INFO - Buffered messages logged at 23:26:53
[task 2021-03-29T23:26:53.468Z] 23:26:53     INFO - Console message: [JavaScript Error: "The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol." {file: "http://example.com/browser/browser/components/sessionstore/test/file_async_duplicate_tab.html#" line: 0}]
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - Buffered messages finished
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_async_duplicate_tab.js | there are two shistory entries - Got 3, expected 2
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - Stack trace:
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - chrome://mochikit/content/browser-test.js:test_is:1359
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - chrome://mochitests/content/browser/browser/components/sessionstore/test/browser_async_duplicate_tab.js:test_duplicate:41
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - Leaving test bound test_duplicate
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - Entering test bound test_duplicate_remove
[task 2021-03-29T23:26:53.469Z] 23:26:53     INFO - Console message: [JavaScript Error: "The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol." {file: "http://example.com/browser/browser/components/sessionstore/test/file_async_duplicate_tab.html" line: 0}]
[task 2021-03-29T23:26:54.047Z] 23:26:54     INFO - Console message: [JavaScript Error: "The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol." {file: "http://example.com/browser/browser/components/sessionstore/test/file_async_duplicate_tab.html#" line: 0}]
[task 2021-03-29T23:26:54.088Z] 23:26:54     INFO - TEST-PASS | browser/components/sessionstore/test/browser_async_duplicate_tab.js | there are two shistory entries - 
[task 2021-03-29T23:26:54.092Z] 23:26:54     INFO - Leaving test bound test_duplicate_remove
[task 2021-03-29T23:26:54.113Z] 23:26:54     INFO - GECKO(15263) | MEMORY STAT | vsize 3188MB | residentFast 505MB | heapAllocated 207MB
[task 2021-03-29T23:26:54.114Z] 23:26:54     INFO - TEST-OK | browser/components/sessionstore/test/browser_async_duplicate_tab.js | took 1439ms
[task 2021-03-29T23:26:54.129Z] 23:26:54     INFO - checking window state
[task 2021-03-29T23:26:54.144Z] 23:26:54     INFO - TEST-START | browser/components/sessionstore/test/browser_async_flushes.js```