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/textures/texture-copying-feedback-loops.html?webglVersion=1 Actual results: conformance/textures/texture-copying-feedback-loops.html (7 of 9 passed) failed: getError expected: INVALID_OPERATION. Was NO_ERROR : after copyTexImage2D to same texture same level, invalid feedback loop failed: getError expected: INVALID_OPERATION. Was NO_ERROR : after copyTexSubImage2D to same texture same level, invalid feedback loop Expected results: Chrome passes all the tests. Firefox fails with both the ANGLE and OpenGL backends.

This was tested to fail independent of hardware: - SPARK, GIADA, MACBOOK_AIR_OSX, MACBOOK_AIR_WIN, MACBOOK_PRO_OSX, MACBOOK_PRO_WIN, MACMINI, MACPRO, NEXUS-4, NEXUS-5, NEXUS-10, SURFACE, WINDBOX, HASWELL, HPOMEN See https://bugzilla.mozilla.org/show_bug.cgi?id=1178601 for hardware configuration details of these systems. The root cause for this failure is likely a missing implementation from https://bugzilla.mozilla.org/show_bug.cgi?id=936739 .

I will try to fix it.

Detect the feedback loop and report error.

Retested this today on my HASWELL PC with Windows 10 Home 64-bit 3.0 GHz Intel 8-Core i7-5960X 32GB of RAM 3840x2160 pixels display SLI 2x ASUS NVIDIA GeForce GTX 980 Ti, 4+4GB of VRAM, driver version 365.19 - nvd3dumx.dll, nvwgf2umx.dll: - version 10.18.13.6191 - date 2/8/2016 - D3D Version 12.1, WDDM 2.0, WHQL approved with Firefox Nightly 50.0a1 (2016-06-19), and I see the failure still occurs.

Review commit: https://reviewboard.mozilla.org/r/63892/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/63892/

Review commit: https://reviewboard.mozilla.org/r/63894/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/63894/

Review commit: https://reviewboard.mozilla.org/r/63896/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/63896/

Review commit: https://reviewboard.mozilla.org/r/63898/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/63898/

Comment on attachment 8770437 [details] Bug 1136508 - Detect CopyTexImage feedback loops. - https://reviewboard.mozilla.org/r/63892/#review60952

Comment on attachment 8770438 [details] Bug 1136508 - Remove redundent READ_BUFFER != NONE validation. - https://reviewboard.mozilla.org/r/63894/#review60954

Comment on attachment 8770439 [details] Bug 1136508 - Removed unused READ_BUFFER out-var from ValidateCurFBForRead. - https://reviewboard.mozilla.org/r/63896/#review60956

Pushed by jgilbert@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/190fa9a5f989 Detect CopyTexImage feedback loops. - r=mtseng https://hg.mozilla.org/integration/mozilla-inbound/rev/13d68716249b Remove redundent READ_BUFFER != NONE validation. - r=mtseng https://hg.mozilla.org/integration/mozilla-inbound/rev/1620c8f330a3 Removed unused READ_BUFFER out-var from ValidateCurFBForRead. - r=mtseng https://hg.mozilla.org/integration/mozilla-inbound/rev/bdfafe991ec6 funcName for CopyTexImage2D should be copyTexImage2D. https://hg.mozilla.org/integration/mozilla-inbound/rev/32c906431710 Build fixes. https://hg.mozilla.org/integration/mozilla-inbound/rev/da8a989f65d1 Mark test as passing.

https://hg.mozilla.org/mozilla-central/rev/190fa9a5f989 https://hg.mozilla.org/mozilla-central/rev/13d68716249b https://hg.mozilla.org/mozilla-central/rev/1620c8f330a3 https://hg.mozilla.org/mozilla-central/rev/bdfafe991ec6 https://hg.mozilla.org/mozilla-central/rev/32c906431710 https://hg.mozilla.org/mozilla-central/rev/da8a989f65d1