This has a high failure rate, currently running backfills [here](https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&resultStatus=pending%2Crunning%2Csuccess%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&searchStr=os%2Cx%2C10.15%2Cwebrender%2Cdebug%2Cmochitests%2Ctest-macosx1015-64-qr%2Fdebug-mochitest-browser-chrome%2Cbc&fromchange=8319e8c25b28a1b598027e583d0b98267a83df3b&tochange=0f9986d4037a1a7662a87e3c76b74c7c68d0eae0&selectedTaskRun=JvfzxQYqSGuHSUKY9BnXVA.0). Emilio, could these failure have something to do with changes in Bug 1839223?
Bug 1839844 Comment 1 Edit History
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This has a high failure rate, currently running backfills [here](https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&resultStatus=pending%2Crunning%2Csuccess%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&searchStr=os%2Cx%2C10.15%2Cwebrender%2Cdebug%2Cmochitests%2Ctest-macosx1015-64-qr%2Fdebug-mochitest-browser-chrome%2Cbc&fromchange=8319e8c25b28a1b598027e583d0b98267a83df3b&tochange=0f9986d4037a1a7662a87e3c76b74c7c68d0eae0&selectedTaskRun=JvfzxQYqSGuHSUKY9BnXVA.0). Emilio, could these failure have something to do with changes in Bug 1839223? Recent failure log: https://treeherder.mozilla.org/logviewer?job_id=420415146&repo=autoland&lineNumber=14215