Filed by: archaeopteryx [at] coole-files.de https://treeherder.mozilla.org/logviewer.html#?job_id=158183123&repo=mozilla-inbound https://queue.taskcluster.net/v1/task/KzSlneI7S-SreGn82LQHvw/runs/0/artifacts/public/logs/live_backing.log https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://queue.taskcluster.net/v1/task/KzSlneI7S-SreGn82LQHvw/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1 12:29:30 INFO - ++DOMWINDOW == 2 (00000212C710AC00) [pid = 4100] [serial = 2] [outer = 00000212C2825470] 12:29:30 INFO - [Parent 10496, IndexedDB #1] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80630001: file z:/build/build/src/storage/mozStorageConnection.cpp, line 759 12:29:30 INFO - [Parent 10496, IndexedDB #1] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80630001: file z:/build/build/src/storage/mozStorageService.cpp, line 718 12:29:30 INFO - [Parent 10496, IndexedDB #1] WARNING: Received NS_ERROR_STORAGE_BUSY when attempting to open database '2918063365piupsah.sqlite', retrying for up to 10 seconds: file z:/build/build/src/dom/indexedDB/ActorsParent.cpp, line 4439 12:29:31 INFO - ++DOMWINDOW == 3 (00000212C890E000) [pid = 4100] [serial = 3] [outer = 00000212C2825470] 12:29:33 ERROR - thread '<unnamed>' panicked at 'assertion failed: `(left != right)` 12:29:33 INFO - left: `0`, 12:29:33 INFO - right: `0`', Z:\build\build\src\gfx\webrender\src\device.rs:1881:12 12:29:33 INFO - stack backtrace: 12:29:33 INFO - 0: 0x7ff9923f4941 - <unknown> 12:29:33 INFO - 1: 0x7ff9924079ac - <unknown> 12:29:33 INFO - 2: 0x7ff992407695 - <unknown> 12:29:33 INFO - 3: 0x7ff992408033 - <unknown> 12:29:33 INFO - 4: 0x7ff992407ea8 - <unknown> 12:29:33 INFO - 5: 0x7ff992407d81 - <unknown> 12:29:33 INFO - 6: 0x7ff9929df8ea - <unknown> 12:29:33 INFO - 7: 0x7ff992a8aca7 - <unknown> 12:29:33 INFO - 8: 0x7ff992a87c54 - <unknown> 12:29:33 INFO - 9: 0x7ff992a877f1 - <unknown> 12:29:33 INFO - 10: 0x7ff992397011 - <unknown> 12:29:33 INFO - 11: 0x7ff993f2986e - mozilla_dump_image 12:29:33 INFO - 12: 0x7ff993f2b1c1 - mozilla_dump_image 12:29:33 INFO - 13: 0x7ff993f27d70 - mozilla_dump_image 12:29:33 INFO - 14: 0x7ff993f29c8a - mozilla_dump_image 12:29:33 INFO - 15: 0x7ff993372138 - <unknown> 12:29:33 INFO - 16: 0x7ff99336bb46 - <unknown> 12:29:33 INFO - 17: 0x7ff99336c2f9 - <unknown> 12:29:33 INFO - 18: 0x7ff993371eff - <unknown> 12:29:33 INFO - 19: 0x7ff993372025 - <unknown> 12:29:33 INFO - 20: 0x7ff993371c35 - <unknown> 12:29:33 INFO - 21: 0x7ff99337328c - <unknown> 12:29:33 INFO - 22: 0x7ff99335d789 - <unknown> 12:29:33 INFO - 23: 0x7ff9c3902773 - BaseThreadInitThunk 12:29:34 INFO - [GFX1-]: Receive IPC close with reason=AbnormalShutdown 12:29:34 INFO - [GFX1-]: [RecGFX1-]: Receive IPC close with reason=Abnoeivrmae lSIhuPCt cldooswn 12:29:34 INFO - e with reason=AbnormalShutdown 12:29:34 INFO - 1516796974589 Marionette INFO Listening on port 2828

Filed an upstream issue for this: https://github.com/servo/webrender/issues/2339

This was on a broken machine, feel free to closed this as invalid. See https://tools.taskcluster.net/provisioners/aws-provisioner-v1/worker-types/gecko-t-win10-64-gpu/workers/us-west-2/i-01546ff98d0358415

Thanks!