FWIW, we accumulated a bunch of mistaken annotations in the past ~day that for logs like [this one](https://treeherder.mozilla.org/logviewer?job_id=449812312&repo=autoland&lineNumber=2183) with a single reftest-failures on macosx1015 for a specific unexpected-pass which started happening due to a bug fix (hooray). That expected-fail annotation was removed in Bug 1863421 comment 11. Those unexpected passes were unrelated to the actual bug here -- so, that spike in reports here shouldn't be taken as any indication that this bug is suddenly getting more frequent than it previously was.
Bug 1878425 Comment 15 Edit History
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FWIW, we accumulated a bunch of mistaken annotations in the past ~day that for logs like [this one](https://treeherder.mozilla.org/logviewer?job_id=449812312&repo=autoland&lineNumber=2183) with a single reftest unexpected-pass on macosx1015, for a specific test that started passing due to a bug fix that landed recently (hooray). That expected-fail annotation was removed in Bug 1863421 comment 11 to reflect reality, so the unexpected passes should stop now. Those unexpected passes were unrelated to the actual bug here -- so, that spike in reports here shouldn't be taken as any indication that this bug is suddenly getting more frequent than it previously was.