Seen on Socorro. This seems to be new. bp-ebfb7145-80b9-4c3f-9811-958770171120 2017-11-20 20:25:29 build 20171120100042 > Crash Reason EXC_BAD_ACCESS / KERN_INVALID_ADDRESS > "compositor": "none" > WR+ contains "webrender": > Ø 0 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x794df8 > Ø 1 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x79d12e > Ø 2 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x79d712 > Ø 3 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x79eb5f > Ø 4 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x792cbc > Ø 5 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x5e60ad > Ø 6 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x1b1434 > Ø 7 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x959f9 > Ø 8 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x6d577 > Ø 9 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0xde81 > Ø 10 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x28c03 > Ø 11 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x26313 > Ø 12 AppleIntelSKLGraphicsGLDriver AppleIntelSKLGraphicsGLDriver@0x23e3d > 13 GLEngine gleDoDrawDispatchCoreGL3 > 14 GLEngine glDrawElementsInstanced_ACC_GL3Exec > 15 XUL webrender::renderer::{{impl}}::draw_instanced_batch<webrender::gpu_types::ClipMaskInstance> gfx/webrender/src/device.rs:1461 > 16 XUL webrender::renderer::{{impl}}::draw_tile_frame gfx/webrender/src/renderer.rs:3271 > 17 XUL webrender::renderer::{{impl}}::render gfx/webrender/src/renderer.rs:2242 > 18 XUL webrender_bindings::bindings::wr_renderer_render gfx/webrender_bindings/src/bindings.rs:500 > 19 XUL mozilla::wr::RendererOGL::Render() gfx/webrender_bindings/RendererOGL.cpp:149 > 20 XUL mozilla::wr::RenderThread::UpdateAndRender(mozilla::wr::WrWindowId) gfx/webrender_bindings/RenderThread.cpp:223 > 21 XUL mozilla::wr::RenderThread::NewFrameReady(mozilla::wr::WrWindowId) gfx/webrender_bindings/RenderThread.cpp:170 > 22 XUL mozilla::detail::RunnableMethodImpl<mozilla::wr::RenderThread*, void (mozilla::wr::RenderThread::*)(mozilla::wr::WrWindowId), true, (mozilla::RunnableKind)0, mozilla::wr::WrWindowId>::Run() xpcom/threads/nsThreadUtils.h:1142 > 23 XUL MessageLoop::DeferOrRunPendingTask(MessageLoop::PendingTask&&) ipc/chromium/src/base/message_loop.cc:452 > 24 XUL MessageLoop::DoWork() ipc/chromium/src/base/message_loop.cc:535 > 25 XUL base::MessagePumpDefault::Run(base::MessagePump::Delegate*) ipc/chromium/src/base/message_pump_default.cc:36 > 26 XUL MessageLoop::Run() ipc/chromium/src/base/message_loop.cc:326 > 27 XUL base::Thread::ThreadMain() ipc/chromium/src/base/thread.cc:181 > 28 XUL ThreadFunc(void*) ipc/chromium/src/base/platform_thread_posix.cc:38 > 29 libsystem_pthread.dylib _pthread_body > 30 libsystem_pthread.dylib _pthread_start > 31 libsystem_pthread.dylib thread_start > 32 XUL XUL@0x4f81bf This bug = [@ AppleIntelSKLGraphicsGLDriver@0x794df8 ] wr bp-ebfb7145-80b9-4c3f-9811-958770171120 2017-11-20 20:25:29 20171120100042 wr bp-ddc1b0bb-d5e1-409f-9cfb-b7f970171120 2017-11-20 20:24:57 20171120100042 wr bp-4d45a1c0-5847-4511-b481-4937e0171120 2017-11-20 20:24:41 20171120100042 off topic / for comparison: The other signature that includes "AppleIntelSKLGraphicsGLDriver" is [@ AppleIntelSKLGraphicsGLDriver@0x1889c ], but it looks completely different: -- bp-4218d21a-dbab-486c-8d97-05d0f0171114 2017-11-14 15:55:14 20171112125346 -- bp-1c980241-d733-46e2-98fa-2befb0171114 2017-11-14 15:52:08 20171112125346