`Assertion failure` without further context in the same log line is sometimes logged for marionette, mochitest and web platform tests ([example](https://treeherder.mozilla.org/jobs?repo=mozilla-central&group_state=expanded&resultStatus=success%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&searchStr=browser-chrome%2Cmsix&revision=75a595a9d65d529c86a28bc528c86caf24891d85&selectedTaskRun=PdPpuFCPShix6rQbc_PZwQ.0). The ones checked were not fatal but e.g. failures related to asynchronous tab switching. They should not be treated as failure lines.
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`Assertion failure` without further context in the same log line is sometimes logged for marionette, mochitest and web platform tests ([example](https://treeherder.mozilla.org/jobs?repo=mozilla-central&group_state=expanded&resultStatus=success%2Ctestfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&searchStr=browser-chrome%2Cmsix&revision=75a595a9d65d529c86a28bc528c86caf24891d85&selectedTaskRun=PdPpuFCPShix6rQbc_PZwQ.0)). The ones checked were not fatal but e.g. failures related to asynchronous tab switching. They should not be treated as failure lines.