This bug was filed from the Socorro interface and is report bp-c2b2aa20-7606-4a4c-be12-4d39c0180615. ============================================================= Small volume Windows regression which seems to have started using 20180614100146: https://bit.ly/2KexV7i. Bug 1364504 landed in that timeframe. Possible regression range based on crash stats: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=0344af5522398276a98629b66df90cca6f395245&tochange=91db0c695f0272f00bf92c81c471a85101056d96 Top 10 frames of crashing thread: 0 @0x0 1 xul.dll mozilla::wr::RenderCompositorANGLE::GetDeviceOfEGLDisplay gfx/webrender_bindings/RenderCompositorANGLE.cpp:61 2 xul.dll mozilla::wr::RenderCompositorANGLE::Initialize gfx/webrender_bindings/RenderCompositorANGLE.cpp:117 3 xul.dll mozilla::wr::RenderCompositorANGLE::Create gfx/webrender_bindings/RenderCompositorANGLE.cpp:35 4 xul.dll mozilla::wr::NewRenderer::Run gfx/webrender_bindings/WebRenderAPI.cpp:59 5 xul.dll mozilla::wr::RenderThread::RunEvent gfx/webrender_bindings/RenderThread.cpp:271 6 xul.dll mozilla::detail::RunnableMethodImpl<mozilla::wr::RenderThread*, void xpcom/threads/nsThreadUtils.h:1216 7 xul.dll MessageLoop::DoWork ipc/chromium/src/base/message_loop.cc:534 8 xul.dll base::MessagePumpDefault::Run ipc/chromium/src/base/message_pump_default.cc:38 9 xul.dll MessageLoop::RunHandler ipc/chromium/src/base/message_loop.cc:318 =============================================================

The crash is weird. RenderCompositorANGLE::GetDeviceOfEGLDisplay() was called after gl::GLLibraryEGL::EnsureInitialized() call. Then gl::GLLibraryEGL::Get() should return valid pointer. And if GLLibraryEGL loaded correct library, egl should have valid fQueryDisplayAttribEXT.

4 crashes in the last 14 days, not particularly high volume.

No new crash since Bug 1471816 fix.