This bug was filed from the Socorro interface and is report bp-1da0fad5-3bcd-4e39-bfa1-f86090171207. ============================================================= Top 10 frames of crashing thread: 0 mozglue.dll arena_t::MallocSmall memory/build/mozjemalloc.cpp:2942 1 mozglue.dll moz_xmalloc memory/mozalloc/mozalloc.cpp:70 2 xul.dll nsTArray_base<nsTArrayInfallibleAllocator, nsTArray_CopyWithConstructors<mozilla::AudioChunk> >::EnsureCapacity<nsTArrayInfallibleAllocator> xpcom/ds/nsTArray-inl.h:136 3 xul.dll nsTArray_Impl<mozilla::AudioChunk, nsTArrayInfallibleAllocator>::AppendElements<nsTArrayInfallibleAllocator> xpcom/ds/nsTArray.h:1673 4 xul.dll mozilla::MediaSegmentBase<mozilla::AudioSegment, mozilla::AudioChunk>::AppendChunk dom/media/MediaSegment.h:494 5 xul.dll mozilla::AudioSegment::AppendFrames dom/media/AudioSegment.h:342 6 xul.dll mozilla::MediaEngineWebRTCMicrophoneSource::PacketizeAndProcess dom/media/webrtc/MediaEngineWebRTCAudio.cpp:908 7 xul.dll mozilla::WebRTCAudioDataListener::NotifyInputData dom/media/webrtc/MediaEngineWebRTC.h:391 8 xul.dll mozilla::AudioCallbackDriver::DataCallback dom/media/GraphDriver.cpp:928 9 xul.dll cubeb_resampler_speex<float, cubeb_resampler_speex_one_way<float>, delay_line<float> >::fill_internal_duplex media/libcubeb/src/cubeb_resampler.cpp:242 ============================================================= There is 1 crash in nightly 59 with buildid 20171206221407. In analyzing the backtrace, the regression may have been introduced by patch [1] to fix bug 1397793. [1] https://hg.mozilla.org/mozilla-central/rev/81889a72ac45

Fixed in https://reviewboard.mozilla.org/r/206292/diff/1-2/, that has landed on central.