User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0 Build ID: 20150224030228 Steps to reproduce: https://www.khronos.org/registry/webgl/sdk/tests/conformance/glsl/bugs/compound-assignment-type-combination.html?webglVersion=1 Actual results: conformance/glsl/bugs/compound-assignment-type-combination.html (219 of 273 passed) failed: [unexpected link status] float += vec2 in a vertex shader should fail. failed: [unexpected link status] float += vec2 in a fragment shader should fail. failed: [unexpected link status] float += vec3 in a vertex shader should fail. failed: [unexpected link status] float += vec3 in a fragment shader should fail. failed: [unexpected link status] float += vec4 in a vertex shader should fail. failed: [unexpected link status] float += vec4 in a fragment shader should fail. failed: [unexpected link status] float += mat2 in a vertex shader should fail. failed: [unexpected link status] float += mat2 in a fragment shader should fail. failed: [unexpected link status] float += mat3 in a vertex shader should fail. failed: [unexpected link status] float += mat3 in a fragment shader should fail. failed: [unexpected link status] float += mat4 in a vertex shader should fail. failed: [unexpected link status] float += mat4 in a fragment shader should fail. failed: [unexpected link status] int += ivec2 in a vertex shader should fail. failed: [unexpected link status] int += ivec2 in a fragment shader should fail. failed: [unexpected link status] int += ivec3 in a vertex shader should fail. failed: [unexpected link status] int += ivec3 in a fragment shader should fail. failed: [unexpected link status] int += ivec4 in a vertex shader should fail. failed: [unexpected link status] int += ivec4 in a fragment shader should fail. failed: [unexpected link status] float -= vec2 in a vertex shader should fail. failed: [unexpected link status] float -= vec2 in a fragment shader should fail. failed: [unexpected link status] float -= vec3 in a vertex shader should fail. failed: [unexpected link status] float -= vec3 in a fragment shader should fail. failed: [unexpected link status] float -= vec4 in a vertex shader should fail. failed: [unexpected link status] float -= vec4 in a fragment shader should fail. failed: [unexpected link status] float -= mat2 in a vertex shader should fail. failed: [unexpected link status] float -= mat2 in a fragment shader should fail. failed: [unexpected link status] float -= mat3 in a vertex shader should fail. failed: [unexpected link status] float -= mat3 in a fragment shader should fail. failed: [unexpected link status] float -= mat4 in a vertex shader should fail. failed: [unexpected link status] float -= mat4 in a fragment shader should fail. failed: [unexpected link status] int -= ivec2 in a vertex shader should fail. failed: [unexpected link status] int -= ivec2 in a fragment shader should fail. failed: [unexpected link status] int -= ivec3 in a vertex shader should fail. failed: [unexpected link status] int -= ivec3 in a fragment shader should fail. failed: [unexpected link status] int -= ivec4 in a vertex shader should fail. failed: [unexpected link status] int -= ivec4 in a fragment shader should fail. failed: [unexpected link status] float /= vec2 in a vertex shader should fail. failed: [unexpected link status] float /= vec2 in a fragment shader should fail. failed: [unexpected link status] float /= vec3 in a vertex shader should fail. failed: [unexpected link status] float /= vec3 in a fragment shader should fail. failed: [unexpected link status] float /= vec4 in a vertex shader should fail. failed: [unexpected link status] float /= vec4 in a fragment shader should fail. failed: [unexpected link status] float /= mat2 in a vertex shader should fail. failed: [unexpected link status] float /= mat2 in a fragment shader should fail. failed: [unexpected link status] float /= mat3 in a vertex shader should fail. failed: [unexpected link status] float /= mat3 in a fragment shader should fail. failed: [unexpected link status] float /= mat4 in a vertex shader should fail. failed: [unexpected link status] float /= mat4 in a fragment shader should fail. failed: [unexpected link status] int /= ivec2 in a vertex shader should fail. failed: [unexpected link status] int /= ivec2 in a fragment shader should fail. failed: [unexpected link status] int /= ivec3 in a vertex shader should fail. failed: [unexpected link status] int /= ivec3 in a fragment shader should fail. failed: [unexpected link status] int /= ivec4 in a vertex shader should fail. failed: [unexpected link status] int /= ivec4 in a fragment shader should fail. Expected results: Chrome passes all the tests. Firefox fails the test with both the ANGLE and OpenGL backends.

Environment: Win 7 64-bit I have the same results as above on Nightly 39.0a1 2015-02-25 and Google Chrome Version 40.0.2214.115 m.

This was tested to fail on the following devices: - SPARK, MACBOOK_AIR_WIN, MACBOOK_PRO_WIN, NEXUS-4, NEXUS-5, SURFACE, WINDBOX, HASWELL, HPOMEN The failure did not occur on the following devices: - GIADA, MACBOOK_AIR_OSX, MACBOOK_PRO_OSX, MACMINI, MACPRO, NEXUS-10 See https://bugzilla.mozilla.org/show_bug.cgi?id=1178601 for hardware configuration details of these systems.

The d3d9 and d3d11 backend are now passing on Windows 10 with HD 4000. 50.0a1 (2016-06-23)

Ubuntu 16.04 also working with HD 5000.