Filed by: egao [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=257829189&repo=try
Full log: https://queue.taskcluster.net/v1/task/cWCwZZc5RO6ExQNtm3XSTA/runs/0/artifacts/public/logs/live_backing.log

Platform: macosx1014
Suite: mochitest-bc

Context:
06:53:59 INFO - TEST-START | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js
06:53:59 INFO - GECKO(1795) | TEST DEVICES: No test devices found (in media.{audio,video}_loopback_dev, using fake streams.
06:54:00 INFO - GECKO(1795) | 2019-07-23 06:54:00.696 firefox[1795:15547] Persistent UI failed to open file file:///Users/cltbld/Library/Saved%20Application%20State/org.mozilla.nightly.savedState/window_1.data: No such file or directory (2)
06:54:44 INFO - TEST-INFO | started process screencapture
06:54:44 INFO - TEST-INFO | screencapture: exit 0
06:54:44 INFO - Buffered messages logged at 06:53:59
06:54:44 INFO - Entering test bound test
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | should start the test without any prior popup notification -
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | should start the test with the control center hidden -
06:54:44 INFO - getUserMedia audio in a first process + video in a second process
06:54:44 INFO - requesting devices
06:54:44 INFO - Buffered messages logged at 06:54:00
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | webRTC-shareDevices notification shown -
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | notification panel open -
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | notification panel populated -
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | expected notification getUserMedia:request -
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | microphone selector visible -
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | camera selector hidden -
06:54:44 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | screen selector hidden -
06:54:44 INFO - Buffered messages finished
06:54:44 INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | Test timed out -
06:54:44 INFO - GECKO(1795) | MEMORY STAT vsizeMaxContiguous not supported in this build configuration.
06:54:44 INFO - GECKO(1795) | MEMORY STAT | vsize 7586MB | residentFast 304MB | heapAllocated 96MB
06:54:44 INFO - TEST-OK | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | took 45200ms
06:54:44 INFO - Not taking screenshot here: see the one that was previously logged
06:54:44 INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js | Found a tab after previous test timed out: https://example.com/browser/browser/base/content/test/webrtc/get_user_media.html -
06:54:44 INFO - checking window state
06:54:44 INFO - GECKO(1795) | must wait for focus
06:54:44 INFO - GECKO(1795) | JavaScript error: resource://testing-common/PromiseTestUtils.jsm, line 112: uncaught exception: Object
06:54:44 INFO - Console message: [JavaScript Error: "uncaught exception: Object" {file: "resource://testing-common/PromiseTestUtils.jsm" line: 112}]
07:00:54 INFO - Buffered messages finished
07:00:54 ERROR - TEST-UNEXPECTED-TIMEOUT | browser/base/content/test/webrtc/browser_devices_get_user_media_multi_process.js (finished) | application timed out after 370 seconds with no output