[1] was the try result. The crash happens on OS X 10.10 opt Mochitest Mochitest WebGL M(gl3). Please see [2] for more details. [1]: https://treeherder.mozilla.org/#/jobs?repo=try&revision=8475d5648ccc069177cf0e1c3fcc0be3c51f2b1e&selectedJob=32912985 [2]: https://treeherder.mozilla.org/logviewer.html#?job_id=32912986&repo=try

21:11:02 INFO - PROCESS-CRASH | dom/canvas/test/webgl-conf/generated/test_2_deqp__functional__gles3__texturespecification__teximage2d_pbo_params.html | application crashed [@ glgConvertTo_32<GLGConverter_BGR8_ARGB8, (GLGMemory)1>(GLGOperationRec const*, GLDPixelModeRec const*) + 0x13e] 21:11:02 INFO - Crash dump filename: /var/folders/xs/dz060mwx3k394rmwvy72m0zr00000w/T/tmpv4Hbpx.mozrunner/minidumps/37B16999-7710-4321-948D-265B5E1D1921.dmp 21:11:02 INFO - Operating system: Mac OS X 21:11:02 INFO - 10.10.5 14F27 21:11:02 INFO - CPU: amd64 21:11:02 INFO - family 6 model 69 stepping 1 21:11:02 INFO - 4 CPUs 21:11:02 INFO - 21:11:02 INFO - GPU: UNKNOWN 21:11:02 INFO - 21:11:02 INFO - Crash reason: EXC_BAD_ACCESS / KERN_INVALID_ADDRESS 21:11:02 INFO - Crash address: 0x43 21:11:02 INFO - Process uptime: 534 seconds 21:11:02 INFO - 21:11:02 INFO - Thread 0 (crashed) 21:11:02 INFO - 0 libGLImage.dylib!void glgConvertTo_32<GLGConverter_BGR8_ARGB8, (GLGMemory)1>(GLGOperationRec const*, GLDPixelModeRec const*) + 0x13e 21:11:02 INFO - rax = 0x0000000000000043 rdx = 0x000000010a670000 21:11:02 INFO - rcx = 0x000000010a67007c rbx = 0x00007fff55664140 21:11:02 INFO - rsi = 0x0000000000000000 rdi = 0x00007fff55664140 21:11:02 INFO - rbp = 0x00007fff55663ed0 rsp = 0x00007fff55663e90 21:11:02 INFO - r8 = 0x0000000000000060 r9 = 0x00000000000b1008 21:11:02 INFO - r10 = 0x00000000002c4000 r11 = 0x00000000002c4020 21:11:02 INFO - r12 = 0x0000000000000043 r13 = 0x000000000000007c 21:11:02 INFO - r14 = 0x000000010a670000 r15 = 0x0000000000000001 21:11:02 INFO - rip = 0x00007fff8b2db95d 21:11:02 INFO - Found by: given as instruction pointer in context 21:11:02 INFO - 1 libGLImage.dylib!glgProcessPixelsWithProcessor + 0x1b52 21:11:02 INFO - rbp = 0x00007fff55664000 rsp = 0x00007fff55663ee0 21:11:02 INFO - rip = 0x00007fff8b2cef4b 21:11:02 INFO - Found by: previous frame's frame pointer 21:11:02 INFO - 2 AppleIntelHD5000GraphicsGLDriver + 0x48798f 21:11:02 INFO - rbp = 0x00007fff556641c0 rsp = 0x00007fff55664010 21:11:02 INFO - rip = 0x000000013048d98f 21:11:02 INFO - Found by: previous frame's frame pointer 21:11:02 INFO - 3 GLEngine!glTexImage2D_Exec + 0x831 21:11:02 INFO - rbp = 0x00007fff556642d0 rsp = 0x00007fff556641d0 21:11:02 INFO - rip = 0x00007fff91714946 21:11:02 INFO - Found by: previous frame's frame pointer 21:11:02 INFO - 4 libGL.dylib!glTexImage2D + 0x4d 21:11:02 INFO - rbp = 0x00007fff55664310 rsp = 0x00007fff556642e0 21:11:02 INFO - rip = 0x00007fff909d046d 21:11:02 INFO - Found by: previous frame's frame pointer 21:11:02 INFO - 5 XUL!mozilla::gl::GLContext::fTexImage2D(unsigned int, int, int, int, int, int, unsigned int, unsigned int, void const*) [GLContext.h:8475d5648ccc : 1631 + 0x23] 21:11:02 INFO - rbp = 0x00007fff55664360 rsp = 0x00007fff55664320 21:11:02 INFO - rip = 0x000000010bbce4bf 21:11:02 INFO - Found by: previous frame's frame pointer 21:11:02 INFO - 6 XUL!mozilla::DoTexImage(mozilla::gl::GLContext*, StrongGLenum<TexImageTargetDetails>, int, mozilla::webgl::DriverUnpackInfo const*, int, int, int, void const*) [WebGLTextureUpload.cpp:8475d5648ccc : 809 + 0x2a] 21:11:02 INFO - rbx = 0x000000012cdf31e4 rbp = 0x00007fff556643e0 21:11:02 INFO - rsp = 0x00007fff55664370 r12 = 0x0000000136314000 21:11:02 INFO - r14 = 0x0000000136314000 r15 = 0x0000000000000000 21:11:02 INFO - rip = 0x000000010c8224f5 21:11:02 INFO - Found by: call frame info 21:11:02 INFO - 7 XUL!mozilla::webgl::TexUnpackBytes::TexOrSubImage(bool, bool, char const*, mozilla::WebGLTexture*, StrongGLenum<TexImageTargetDetails>, int, mozilla::webgl::DriverUnpackInfo const*, int, int, int, unsigned int*) const [TexUnpackBlob.cpp:8475d5648ccc : 314 + 0x17] 21:11:02 INFO - rbx = 0x0000000000000043 rbp = 0x00007fff556644d0 21:11:02 INFO - rsp = 0x00007fff556643f0 r12 = 0x000000012eabf800 21:11:02 INFO - r13 = 0x0000000000000000 r14 = 0x000000012eabf840 21:11:02 INFO - r15 = 0x0000000000000000 rip = 0x000000010c7bd88e 21:11:02 INFO - Found by: call frame info 21:11:02 INFO - 8 XUL!mozilla::WebGLTexture::TexImage(char const*, StrongGLenum<TexImageTargetDetails>, int, unsigned int, mozilla::webgl::PackingInfo const&, mozilla::webgl::TexUnpackBlob const*) [WebGLTextureUpload.cpp:8475d5648ccc : 1244 + 0x38] 21:11:02 INFO - rbx = 0x000000010fe80c28 rbp = 0x00007fff556645b0 21:11:02 INFO - rsp = 0x00007fff556644e0 r12 = 0x000000013222f000 21:11:02 INFO - r13 = 0x0000000000000de1 r14 = 0x000000013222f080 21:11:02 INFO - r15 = 0x0000000000000000 rip = 0x000000010c821b0d 21:11:02 INFO - Found by: call frame info 21:11:02 INFO - 9 XUL!mozilla::WebGLTexture::TexImage(char const*, StrongGLenum<TexImageTargetDetails>, int, unsigned int, int, int, int, int, mozilla::webgl::PackingInfo const&, mozilla::TexImageSource const&) [WebGLTextureUpload.cpp:8475d5648ccc : 431 + 0x1f] 21:11:02 INFO - rbx = 0x000000012c01c840 rbp = 0x00007fff55664670 21:11:02 INFO - rsp = 0x00007fff556645c0 r12 = 0x000000013222f000 21:11:02 INFO - r13 = 0x0000000000000de1 r14 = 0x00007fff556646d0 21:11:02 INFO - r15 = 0x000000010efe16d4 rip = 0x000000010c821562 21:11:02 INFO - Found by: call frame info 21:11:02 INFO - 10 XUL!mozilla::WebGLContext::TexImage(char const*, unsigned char, unsigned int, int, unsigned int, int, int, int, int, unsigned int, unsigned int, mozilla::TexImageSource const&) [WebGLContextTextures.cpp:8475d5648ccc : 396 + 0x3e] 21:11:02 INFO - rbx = 0x000000012eabf800 rbp = 0x00007fff55664700 21:11:02 INFO - rsp = 0x00007fff55664680 r12 = 0x000000010efe16d4 21:11:02 INFO - r13 = 0x0000000000000de1 r14 = 0x000000000000001f 21:11:02 INFO - r15 = 0x0000000000000000 rip = 0x000000010c7ed999 21:11:02 INFO - Found by: call frame info 21:11:02 INFO - 11 XUL!mozilla::dom::WebGL2RenderingContextBinding::texImage2D [WebGLContext.h:8475d5648ccc : 1137 + 0x4c] 21:11:02 INFO - rbx = 0xfff8800000000000 rbp = 0x00007fff55664870 21:11:02 INFO - rsp = 0x00007fff55664710 r12 = 0xfff9000000000000 21:11:02 INFO - r13 = 0xfff8800000000000 r14 = 0x00007fff55664890 21:11:02 INFO - r15 = 0xfff8800000008051 rip = 0x000000010c492fee

Reopen if it still crashes for you.