This bug was filed from the Socorro interface and is report bp-6a2e2c98-18ef-4b92-944a-b02b30181115. ============================================================= Top 10 frames of crashing thread: 0 libxul.so libyuv::I422ToARGBRow_AVX2 media/libyuv/libyuv/source/row_gcc.cc:2504 1 libxul.so libyuv::I420ToARGBMatrix media/libyuv/libyuv/source/convert_argb.cc:110 2 libxul.so mozilla::gfx::ConvertYCbCrToRGB gfx/ycbcr/YCbCrUtils.cpp:235 3 libxul.so mozilla::layers::PlanarYCbCrImage::GetAsSourceSurface gfx/layers/ImageContainer.cpp:618 4 libxul.so mozilla::layers::SharedPlanarYCbCrImage::GetAsSourceSurface gfx/layers/ipc/SharedPlanarYCbCrImage.cpp:73 5 libxul.so mozilla::layers::BasicImageLayer::Paint gfx/layers/basic/BasicImageLayer.cpp:81 6 libxul.so mozilla::layers::BasicLayerManager::PaintSelfOrChildren gfx/layers/basic/BasicLayerManager.cpp:712 7 libxul.so mozilla::layers::BasicLayerManager::PaintLayer gfx/layers/basic/BasicLayerManager.cpp:890 8 libxul.so mozilla::layers::BasicLayerManager::EndTransactionInternal gfx/layers/basic/BasicLayerManager.cpp:617 9 libxul.so mozilla::FrameLayerBuilder::PaintItems layout/painting/FrameLayerBuilder.cpp:4249 ============================================================= [Note]: - One time crash [Affected versions]: - 63.0.3-build1 (20181114214635) [Affected platforms]: - Ubuntu 16.04 x86 [Steps to reproduce]: - reproduced while having https://www.youtube.com/ playing on random videos for about 1 hour, with autoplay turned ON - no heavy content websites opened (the other tabs were having Facebook, Gmail, Yahoo search, Web Skype and Amazon content) - the Youtube tab wasn't in focus - after a while, the audio provided by the Youtube tab stopped - focusing the Youtube tab, the content disappeared, being replaced by a white loading page - after 1-2 seconds, the Youtube tab crashed [Additional notes]: - I will continue investigating this, in order to find more accurate STR and regression related info - I didn't manage to reproduce this issue on other platforms

Copied Jean-Yves so he'll see if better STR are added.