https://chromium-review.googlesource.com/c/angle/angle/+/742922 , which is the only commit in the ANGLE roll, looks directly related. It's unfortunate that the logs are truncated so that it's impossible to see any assertion failures that might be happening in the GPU process during shader translation.

I've submitted a revert in https://chromium-review.googlesource.com/c/angle/angle/+/750410 .

Jamie, could you please roll forward ANGLE manually to get that into the Chromium tree assuming it clears up the failures of all the Debug bots on chromium.gpu.fyi? Thanks.

Delegating to ANGLE sheriff. But yeah I can handle this if you don't want Corentin.

Delegation is fine. :)

Olli, the revert of your patch doesn't compile any more:
https://chromium-review.googlesource.com/c/angle/angle/+/750410

Could you please own this bug? You should be able to reproduce locally with a debug build of Chrome (I know, painful, sorry) or perhaps just a debug build of ANGLE if you can figure out how to drop one into a Release build of Chrome.

All the Win Debug bots are broken running this test now. It's P1.

This fix should work: https://chromium-review.googlesource.com/c/angle/angle/+/750781

I didn't test it with Chromium but I'm pretty sure it takes care of the issue.

On a related note, I'm not sure if the uniform limit tests are the best they could be - some of the shaders contain extremely complex expressions that will fail ANGLE's expression depth check. We could change them so that they are better targeted: they should only fail uniform limit checks, not other checks. Another stress test could be added to specifically test expression depth limits.

The following revision refers to this bug:
  https://chromium.googlesource.com/angle/angle/+/640d597d88906f10d187235447309ba38c6705b6

commit 640d597d88906f10d187235447309ba38c6705b6
Author: Olli Etuaho <oetuaho@nvidia.com>
Date: Thu Nov 02 11:40:56 2017

Add missing check in Compiler

Further AST traversals should not be run in case the expression
complexity check failed and set success=false. Otherwise traversal
can result in stack overflow.

BUG= chromium:780545 
TEST=WebGL conformance tests

Change-Id: Icfde8c051038c691563e199a6d3a17b1e8e5ebf5
Reviewed-on: https://chromium-review.googlesource.com/750781
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

[modify] https://crrev.com/640d597d88906f10d187235447309ba38c6705b6/src/compiler/translator/Compiler.cpp

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/b693fbf0fac5978650b2677cae7647128ddb52ab

commit b693fbf0fac5978650b2677cae7647128ddb52ab
Author: angle-deps-roller@chromium.org <angle-deps-roller@chromium.org>
Date: Thu Nov 02 12:30:31 2017

Roll skia/third_party/externals/angle2/ 4ef250333..640d597d8 (1 commit)

https://chromium.googlesource.com/angle/angle.git/+log/4ef250333c5c..640d597d8890

$ git log 4ef250333..640d597d8 --date=short --no-merges --format='%ad %ae %s'
2017-11-02 oetuaho Add missing check in Compiler

Created with:
  roll-dep skia/third_party/externals/angle2
BUG= 780545 


The AutoRoll server is located here: https://angle-skia-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


CQ_INCLUDE_TRYBOTS=skia.primary:Perf-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE,Perf-Win10-MSVC-Golo-GPU-QuadroP400-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-ShuttleC-GPU-GTX960-x86_64-Debug-All-ANGLE,Test-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE,Test-Win10-MSVC-Golo-GPU-QuadroP400-x86_64-Debug-All-ANGLE,Test-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE,Test-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE,Test-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE,Test-Win10-Clang-ShuttleC-GPU-GTX960-x86_64-Debug-All-ANGLE,Build-Debian9-GCC-x86_64-Release-ANGLE
TBR=stani@google.com

Change-Id: I52f7a6dcfb5105c8e4614a39284dd74f7068c755
Reviewed-on: https://skia-review.googlesource.com/66661
Reviewed-by: angle-deps-roller . <angle-deps-roller@chromium.org>
Commit-Queue: angle-deps-roller . <angle-deps-roller@chromium.org>

[modify] https://crrev.com/b693fbf0fac5978650b2677cae7647128ddb52ab/DEPS

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b0ddb4a6a51d97fc09acaee19f9ffbb1d0a421a9

commit b0ddb4a6a51d97fc09acaee19f9ffbb1d0a421a9
Author: skia-deps-roller@chromium.org <skia-deps-roller@chromium.org>
Date: Thu Nov 02 17:24:52 2017

Roll src/third_party/skia/ 8186cbee6..8d05a2dc0 (8 commits)

https://skia.googlesource.com/skia.git/+log/8186cbee6cff..8d05a2dc09b8

$ git log 8186cbee6..8d05a2dc0 --date=short --no-merges --format='%ad %ae %s'
2017-11-02 angle-deps-roller Roll skia/third_party/externals/angle2/ 640d597d8..e1f3ad4d8 (2 commits)
2017-11-02 jvanverth Add sample mouse support to Viewer
2017-11-01 mtklein add a GM to demo dither
2017-11-02 kjlubick Add Pixelbook to tree
2017-11-02 kjlubick Make CPU coverage bot a bit faster
2017-11-01 egdaniel Remove content area from GrTextureAdjuster.
2017-11-01 ethannicholas API to cache shader binaries between runs of Skia.
2017-11-02 angle-deps-roller Roll skia/third_party/externals/angle2/ 4ef250333..640d597d8 (1 commit)

Created with:
  roll-dep src/third_party/skia
BUG= 780545 


The AutoRoll server is located here: https://autoroll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=stani@chromium.org

Change-Id: I5f7b3217777f85b4164faab01851bc344ff065db
Reviewed-on: https://chromium-review.googlesource.com/751162
Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513532}
[modify] https://crrev.com/b0ddb4a6a51d97fc09acaee19f9ffbb1d0a421a9/DEPS

Thanks Olli for the fix. The uniform tests can certainly be changed to better separate concerns. If you can propose a pull request we'd really appreciate it.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/09ce14c7d3c8ef1dd4e7e32fc1ed043b703d8da9

commit 09ce14c7d3c8ef1dd4e7e32fc1ed043b703d8da9
Author: angle-deps-roller@chromium.org <angle-deps-roller@chromium.org>
Date: Fri Nov 03 05:32:24 2017

Roll src/third_party/angle/ 63458a3ed..7b62cf97d (24 commits)

https://chromium.googlesource.com/angle/angle.git/+log/63458a3ed819..7b62cf97d12b

$ git log 63458a3ed..7b62cf97d --date=short --no-merges --format='%ad %ae %s'
2017-11-02 jmadill Refactor TextureFormatMap to store an array.
2017-11-02 jmadill Add missing reset to GL multi-view dirty bits.
2017-11-02 jmadill Use active textures mask with robust init.
2017-11-02 jmadill Vulkan: Refactor format table.
2017-11-02 oetuaho Remove repeated "success" check from compileTreeImpl
2017-10-27 jie.a.chen ES31 program query: support AtomicCounterBuffer and UniformBlock
2017-11-02 jmadill Add a meta-script to run code generators.
2017-10-27 geofflang Pass offsets to base validation for CompressedSubTexImage3D.
2017-10-28 jmadill Vulkan: Add vk::GetImpl helper.
2017-10-28 jmadill Vulkan: Allow in-flight Framebuffer changes.
2017-11-02 oetuaho Add missing check in Compiler
2017-11-01 jie.a.chen Refactor StaticallyUsed
2017-09-27 geofflang Make GL_OES_get_program_binary enableable.
2017-10-27 ynovikov Run angle_perftests on GLES backend
2017-10-28 jmadill Vulkan: Fix deleting in-use Framebuffer.
2017-10-30 geofflang Make compressed texture format extensions enableable.
2017-11-01 jmadill Vulkan: Support Texture redefinition.
2017-10-30 geofflang Make ANGLE_texture_usage enableable.
2017-10-28 jmadill Vulkan: Fix re-creating buffer storage.
2017-10-28 jmadill Introduce SimpleStateChangeTests.
2017-10-28 jmadill Remove WrappedObject::retain.
2017-10-30 geofflang Fix minor issues with ANGLE_texture_rectangle.
2017-10-30 cwallez preprocessor: Fix lineno overflow on line continuations
2017-11-01 geofflang Revert BGRA renderability change for ES drivers.

Created with:
  roll-dep src/third_party/angle
BUG= 780545 ,675997, 774807 , 779346 


The AutoRoll server is located here: https://angle-chromium-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
TBR=cwallez@chromium.org

Change-Id: Ic633a311ad465c126e473a2c38704b034c7e799d
Reviewed-on: https://chromium-review.googlesource.com/752511
Reviewed-by: angle-deps-roller . <angle-deps-roller@chromium.org>
Commit-Queue: angle-deps-roller . <angle-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513699}
[modify] https://crrev.com/09ce14c7d3c8ef1dd4e7e32fc1ed043b703d8da9/DEPS