This bug was filed from the Socorro interface and is report bp-c3237c94-bef1-4e68-81aa-9b5380171018. ============================================================= There are 12 crashes in nightly 58 starting with buildid 20171013220204 (see push log in [1]). :botond, could you investigate ? [1] https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=196dadb2fe500e75c6fbddcac78106648676cf10&tochange=a31334a65a1c75638efae4452ecd271450df2ad0

I'm guessing this is also a regression from bug 1391262.

Some additional notes from Kats over IRC: <kats> botond: [bug 1391262] affected layer manager creation codepaths with both WR and non-WR <kats> botond: in particular it seems like it creates BasicLayerManager instances in some cases where previously we were creating ClientLayerManager or WebRenderLayerManager <kats> botond: and so i suspect the SendLayersDependent function is crashing because it's trying to send stuff to the compositor over a BasicLayerManager which won't work <kats> botond: the other regression from that bug is being investigated by sotaro, https://bugzilla.mozilla.org/show_bug.cgi?id=1408490#c7 Let's wait until bug 1408490 is fixed, and see if that fixes this too.

Last buildid on 58.0 that has this crash is 20171030103605, which corresponds with when the fix for bug 1408490 landed. So I believe this was fixed by that patch.

The link in comment 4 seems totally unrelated. If there is an intermittent failure please file a new bug for it as this one was about crashes found via crash-stats.

Oh I see you reopened it because this bug was duped to the other one. Let's leave this duped, we can look at the failure in the other bug.