Here's a link of a push : https://treeherder.mozilla.org/#/jobs?repo=try&revision=dfef69eb4c0f&filter-resultStatus=testfailed&filter-resultStatus=busted&filter-resultStatus=exception&filter-classifiedState=unclassified These, failures were obtained while bisecting another directory, dom/media/test. 02:33:45 WARNING - TEST-UNEXPECTED-FAIL | dom/media/webaudio/test/ | application terminated with exit code 1 02:33:45 INFO - runtests.py | Application ran for: 0:01:25.154000 02:33:45 INFO - zombiecheck | Reading PID log: c:\docume~1\cltbld~1.t-x\locals~1\temp\tmp_l_wwfpidlog 02:33:57 INFO - mozcrash Saved minidump as C:\slave\test\build\blobber_upload_dir\45fcaa64-aed7-4aa2-a4a4-0497b76bcfef.dmp 02:33:57 INFO - mozcrash Saved app info as C:\slave\test\build\blobber_upload_dir\45fcaa64-aed7-4aa2-a4a4-0497b76bcfef.extra 02:33:57 WARNING - PROCESS-CRASH | dom/media/webaudio/test/test_waveShaperNoCurve.html | application crashed [@ mozilla::AssertNotAlreadyCached]

Probably same issue as bug 1202567