Breakpoint 1, android::CameraGraphicBuffer::Unlock (this=<value optimized out>) at /home/alex/codaz/B2G/gecko/dom/camera/GonkNativeWindow.h:247
247	        if (mLocked) {
(gdb) bt
#0  android::CameraGraphicBuffer::Unlock (this=<value optimized out>) at /home/alex/codaz/B2G/gecko/dom/camera/GonkNativeWindow.h:247
#1  0x40cf0ec8 in ~GonkIOSurfaceImage (this=0x29d8b78, __in_chrg=<value optimized out>) at /home/alex/codaz/B2G/gecko/gfx/layers/GonkIOSurfaceImage.h:62
#2  0x40cf0ee8 in ~GonkIOSurfaceImage (this=0x1df2e98, __in_chrg=<value optimized out>) at /home/alex/codaz/B2G/gecko/gfx/layers/GonkIOSurfaceImage.h:63
#3  0x407e5c04 in mozilla::MediaStreamListener::Release (this=0x29d8b78) at ../../../../dist/include/MediaStreamGraph.h:93
#4  0x40963398 in ~nsRefPtr (this=0x28508e8, __in_chrg=<value optimized out>) at ../../dist/include/nsAutoPtr.h:874
#5  ~VideoFrame (this=0x28508e8, __in_chrg=<value optimized out>) at /home/alex/codaz/B2G/gecko/content/media/VideoSegment.cpp:22
#6  0x40963462 in ~VideoChunk (this=0x2eadba4, start=0, count=43879292) at /home/alex/codaz/B2G/gecko/content/media/VideoSegment.cpp:41
#7  nsTArrayElementTraits<mozilla::VideoChunk>::Destruct (this=0x2eadba4, start=0, count=43879292) at ../../dist/include/nsTArray.h:348
#8  nsTArray<mozilla::VideoChunk, nsTArrayDefaultAllocator>::DestructRange (this=0x2eadba4, start=0, count=43879292) at ../../dist/include/nsTArray.h:1213
#9  nsTArray<mozilla::VideoChunk, nsTArrayDefaultAllocator>::RemoveElementsAt (this=0x2eadba4, start=0, count=43879292) at ../../dist/include/nsTArray.h:933
#10 0x409634e6 in mozilla::MediaSegmentBase<mozilla::VideoSegment, mozilla::VideoChunk>::RemoveLeading (this=0x2eadb90, aDuration=1, aStartIndex=0)
    at /home/alex/codaz/B2G/gecko/content/media/MediaSegment.h:300
#11 0x40963700 in mozilla::MediaSegmentBase<mozilla::VideoSegment, mozilla::VideoChunk>::ForgetUpTo (this=0x2eadb90, aDuration=1)
    at /home/alex/codaz/B2G/gecko/content/media/MediaSegment.h:167
#12 0x4096307c in mozilla::StreamBuffer::Track::ForgetUpTo (this=0x1d629a0, aTime=<value optimized out>) at /home/alex/codaz/B2G/gecko/content/media/StreamBuffer.h:164
#13 mozilla::StreamBuffer::ForgetUpTo (this=0x1d629a0, aTime=<value optimized out>) at /home/alex/codaz/B2G/gecko/content/media/StreamBuffer.cpp:56
#14 0x40959af4 in mozilla::MediaStream::AdvanceTimeVaryingValuesToCurrentTime (this=<value optimized out>, aCurrentTime=1262635, aBlockedTime=0)
    at /home/alex/codaz/B2G/gecko/content/media/MediaStreamGraph.h:385
#15 0x409580cc in mozilla::MediaStreamGraphImpl::UpdateCurrentTime (this=0x2cd9b08) at /home/alex/codaz/B2G/gecko/content/media/MediaStreamGraph.cpp:816
#16 0x40959140 in mozilla::MediaStreamGraphImpl::RunThread (this=0x2cd9b08) at /home/alex/codaz/B2G/gecko/content/media/MediaStreamGraph.cpp:1352
#17 0x409593bc in Run (this=<value optimized out>) at /home/alex/codaz/B2G/gecko/content/media/MediaStreamGraph.cpp:1510
#18 0x40c8e072 in nsThread::ProcessNextEvent (this=0x284b0a8, mayWait=<value optimized out>, result=0x4ee0feb7) at /home/alex/codaz/B2G/gecko/xpcom/threads/nsThread.cpp:624
#19 0x40c6e77e in NS_ProcessNextEvent_P (thread=0x0, mayWait=true) at /home/alex/codaz/B2G/objdir-gecko/xpcom/build/nsThreadUtils.cpp:220
#20 0x40c8e4a0 in nsThread::ThreadFunc (arg=<value optimized out>) at /home/alex/codaz/B2G/gecko/xpcom/threads/nsThread.cpp:257
#21 0x401629b4 in _pt_root (arg=<value optimized out>) at /home/alex/codaz/B2G/gecko/nsprpub/pr/src/pthreads/ptthread.c:156
#22 0x400adc28 in __thread_entry (func=0x40162955 <_pt_root>, arg=0x2371798, tls=<value optimized out>) at bionic/libc/bionic/pthread.c:217
#23 0x400ad77c in pthread_create (thread_out=<value optimized out>, attr=0xbee88684, start_routine=0x40162955 <_pt_root>, arg=0x2371798) at bionic/libc/bionic/pthread.c:357
#24 0x00000000 in ?? ()