Filed by: aciure [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=257543507&repo=autoland
Full log: https://queue.taskcluster.net/v1/task/d1hmLNCYQK-Ba8e3-n_T7g/runs/0/artifacts/public/logs/live_backing.log

16:12:42 INFO - TEST-PASS | toolkit/components/passwordmgr/test/browser/browser_autocomplete_footer.js | object in event pwmgr#open_management#autocomplete must match. - "autocomplete" matches "autocomplete" -
16:12:42 INFO - Buffered messages finished
16:12:42 INFO - TEST-UNEXPECTED-FAIL | toolkit/components/passwordmgr/test/browser/browser_autocomplete_footer.js | A promise chain failed to handle a rejection: [Exception... "Component not initialized" nsresult: "0xc1f30001 (NS_ERROR_NOT_INITIALIZED)" location: "JS frame :: resource:///modules/AboutLoginsParent.jsm :: receiveMessage/< :: line 192" data: no] - stack: receiveMessage/<@resource:///modules/AboutLoginsParent.jsm:192:26
16:12:42 INFO - Rejection date: Sat Jul 20 2019 16:12:41 GMT+0000 (Greenwich Mean Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 263
16:12:42 INFO - Stack trace:
16:12:42 INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:263
16:12:42 INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1377
16:12:42 INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1381
16:12:42 INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1209
16:12:42 INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:803
16:12:42 INFO - Leaving test bound test_autocomplete_footer_keydown
16:12:42 INFO - GECKO(3904) | MEMORY STAT | vsize 19406215MB | vsizeMaxContiguous 65459166MB | residentFast 941MB
16:12:42 INFO - TEST-OK | toolkit/components/passwordmgr/test/browser/browser_autocomplete_footer.js | took 2547ms
16:12:42 INFO - checking window state
16:12:42 INFO - GECKO(3904) | JavaScript error: resource://testing-common/PromiseTestUtils.jsm, line 112: uncaught exception: Object