This bug was filed from the Socorro interface and is report bp-6a8f9047-b7d1-48ab-b0f3-b128b0171111. ============================================================= Seen while looking at nightly crash stats - looks like about 27 crashes/14 installs in the last week: http://bit.ly/2Ci92ju Top 10 frames of crashing thread: 0 xul.dll mozilla::gfx::RecordedSourceSurfaceCreation::Record<mozilla::gfx::MemWriter> gfx/2d/RecordedEventImpl.h:2477 1 xul.dll mozilla::gfx::RecordedEventDerived<mozilla::gfx::RecordedSourceSurfaceCreation>::RecordToStream gfx/2d/RecordedEventImpl.h:38 2 xul.dll mozilla::gfx::StoreSourceSurfaceRecording gfx/2d/DrawTargetWrapAndRecord.cpp:54 3 xul.dll mozilla::gfx::EnsureSurfaceStoredRecording gfx/2d/DrawTargetWrapAndRecord.cpp:69 4 xul.dll mozilla::gfx::DrawTargetRecording::EnsurePatternDependenciesStored gfx/2d/DrawTargetRecording.cpp:643 5 xul.dll mozilla::gfx::DrawTargetRecording::FillRect gfx/2d/DrawTargetRecording.cpp:268 6 xul.dll gfxSurfaceDrawable::DrawInternal gfx/thebes/gfxDrawable.cpp:104 7 xul.dll gfxSurfaceDrawable::Draw gfx/thebes/gfxDrawable.cpp:74 8 xul.dll gfxUtils::DrawPixelSnapped gfx/thebes/gfxUtils.cpp:584 9 xul.dll mozilla::image::imgFrame::Draw image/imgFrame.cpp:586 =============================================================

This might be due to a realloc fail at https://searchfox.org/mozilla-central/rev/110706c3c09d457dc70293b213d7bccb4f6f5643/gfx/2d/RecordedEvent.h#199 - it doesn't look like we check for that failure mode.

Last one was in buildid 20180312134431 but it's low volume enough that it might still be happening. We should probably guard against the realloc fail at some point.

Doesn't block release.