Bug: Intermittent <test-name> | uncaught exception - TypeError: class heritage MozButton is not an object or null at @chrome://browser/content/preferences/findInPage.js:13:1
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2022-03-11 00:53:54+00:00
Resolved: 2022-03-14 00:56:52+00:00

**Filed by:** mlaza [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=370580478&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/W0QElVdfSvyiZque0s0KRw/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2022-03-10T20:31:22.599Z] 20:31:22     INFO - TEST-PASS | browser/components/preferences/tests/browser_searchsuggestions.js | Should have disabled the private suggestions box - 
[task 2022-03-10T20:31:22.599Z] 20:31:22     INFO - Leaving test bound test_suggestions_start_enabled
[task 2022-03-10T20:31:22.600Z] 20:31:22     INFO - Entering test bound test_suggestions_start_disabled
[task 2022-03-10T20:31:22.601Z] 20:31:22     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2022-03-10T20:31:22.601Z] 20:31:22     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2022-03-10T20:31:22.602Z] 20:31:22     INFO - Console message: [JavaScript Error: "uncaught exception: out of memory"]
[task 2022-03-10T20:31:22.603Z] 20:31:22     INFO - Buffered messages finished
[task 2022-03-10T20:31:22.604Z] 20:31:22     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_searchsuggestions.js | uncaught exception - TypeError: class heritage MozButton is not an object or null at @chrome://browser/content/preferences/findInPage.js:13:1
[task 2022-03-10T20:31:22.604Z] 20:31:22     INFO - 
[task 2022-03-10T20:31:22.604Z] 20:31:22     INFO - Stack trace:
[task 2022-03-10T20:31:22.604Z] 20:31:22     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:simpletestOnerror:1957
[task 2022-03-10T20:31:22.605Z] 20:31:22     INFO - GECKO(4428) | JavaScript error: chrome://browser/content/preferences/findInPage.js, line 13: TypeError: class heritage MozButton is not an object or null
[task 2022-03-10T20:31:22.606Z] 20:31:22     INFO - Console message: [JavaScript Error: "TypeError: class heritage MozButton is not an object or null" {file: "chrome://browser/content/preferences/findInPage.js" line: 13}]
[task 2022-03-10T20:31:22.606Z] 20:31:22     INFO - @chrome://browser/content/preferences/findInPage.js:13:1
[task 2022-03-10T20:31:22.606Z] 20:31:22     INFO - 
[task 2022-03-10T20:31:22.607Z] 20:31:22     INFO - GECKO(4428) | [GFX1-]: wr_renderer_render: OutOfMemory
[task 2022-03-10T20:31:22.607Z] 20:31:22     INFO - GECKO(4428) | [GFX1-]: wr_renderer_render: OutOfMemory
[task 2022-03-10T20:31:22.608Z] 20:31:22     INFO - GECKO(4428) | IPDL protocol error: Handler returned error code!
[task 2022-03-10T20:31:22.609Z] 20:31:22     INFO - GECKO(4428) | ###!!! [Parent][DispatchSyncMessage] Error: PCompositorBridge::Msg_NotifyChildRecreated Processing error: message was deserialized, but the handler returned false (indicating failure)
[task 2022-03-10T20:31:22.609Z] 20:31:22     INFO - GECKO(4428) | [GFX1-]: Failed to connect WebRenderBridgeChild.
[task 2022-03-10T20:31:22.610Z] 20:31:22     INFO - Not taking screenshot here: see the one that was previously logged
```