I'll take a look...
Assignee: nobody → mats
All I've seen so far are on Windows PGO builds. Dunno if that's going to hold true for everything, but that's what's there now...
OK, thanks. I'll try to fix it on Win7 pgo and hope that fixes Win8 too. Let me know if see any failures on other platforms.
This seems to fix it on Win7 at least, hopefully on Win8 too. https://treeherder.mozilla.org/#/jobs?repo=try&revision=809b769a5710
Attachment #8729831 - Flags: review+
FYI, looks like focusring-3.html also hits this from time to time as well.
> FYI, looks like focusring-3.html also hits this from time to time as well. Please file a bug and n-i? me if you see it again (and let me know which platforms are affected).
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