Bug: Intermittent browser/base/content/test/pageActions-proton/browser_PageActions_overflow.js | Uncaught exception - at resource://testing-common/BrowserTestUtils.jsm:323 - TypeError: element is null
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-04-24 15:22:55+00:00
Resolved: 2021-05-18 17:04:32+00:00

**Filed by:** csabou [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=337616190&repo=try
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/KB_eOtAnRUSVzlyTyiKJjg/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-04-24T11:57:46.635Z] 11:57:46     INFO - TEST-PASS | browser/base/content/test/pageActions-proton/browser_PageActions_overflow.js | window is bigger than 700px - 1280 > 700 - 
[task 2021-04-24T11:57:46.635Z] 11:57:46     INFO - Check page action buttons are visible, the meatball button is not
[task 2021-04-24T11:57:46.635Z] 11:57:46     INFO - Buffered messages finished
[task 2021-04-24T11:57:46.636Z] 11:57:46     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/pageActions-proton/browser_PageActions_overflow.js | Uncaught exception - at resource://testing-common/BrowserTestUtils.jsm:323 - TypeError: element is null
[task 2021-04-24T11:57:46.636Z] 11:57:46     INFO - Stack trace:
[task 2021-04-24T11:57:46.636Z] 11:57:46     INFO - is_visible@resource://testing-common/BrowserTestUtils.jsm:323:17
[task 2021-04-24T11:57:46.636Z] 11:57:46     INFO - test@chrome://mochitests/content/browser/browser/base/content/test/pageActions-proton/browser_PageActions_overflow.js:37:30
[task 2021-04-24T11:57:46.636Z] 11:57:46     INFO - Leaving test bound test
[task 2021-04-24T11:57:46.636Z] 11:57:46     INFO - Entering test bound bookmark
[task 2021-04-24T11:57:46.637Z] 11:57:46     INFO - Extension loaded
[task 2021-04-24T11:57:46.637Z] 11:57:46     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: "data:text/html,<h1>A Page</h1>" line: 0}]
[task 2021-04-24T11:57:46.637Z] 11:57:46     INFO - Console message: [JavaScript Warning: "browser.ui.customized_widgets - The key length must be limited to 72 characters."]
[task 2021-04-24T11:57:46.817Z] 11:57:46     INFO - Shrink the window if necessary, check the meatball menu is visible
[task 2021-04-24T11:57:46.856Z] 11:57:46     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: "data:text/html,<h1>A Page</h1>" line: 0}]
[task 2021-04-24T11:57:46.857Z] 11:57:46     INFO - Got resize event: 500 x 1062
[task 2021-04-24T11:57:46.944Z] 11:57:46     INFO - TEST-PASS | browser/base/content/test/pageActions-proton/browser_PageActions_overflow.js | true == true - ```