The Mac FYI Experimental Release (NVIDIA) bot was recently upgraded to the 10.13.4 beta in Issue 812954. Previously it had been (accidentally) running 10.13.3.

https://ci.chromium.org/buildbot/chromium.gpu.fyi/Mac%20FYI%20Experimental%20Retina%20Release%20%28NVIDIA%29/

I'm not sure whether it coincided with the OS upgrade -- looking more deeply, it doesn't look like it did -- but GLImageIOSurface/GLImageBindTest/4.BindTexImage is now failing reliably on this bot. Here's the first failing build I could find:

https://ci.chromium.org/buildbot/chromium.gpu.fyi/Mac%20FYI%20Experimental%20Retina%20Release%20%28NVIDIA%29/14

and the current build fails too:

https://ci.chromium.org/buildbot/chromium.gpu.fyi/Mac%20FYI%20Experimental%20Retina%20Release%20%28NVIDIA%29/43

Here's the failure log:

[ RUN      ] GLImageIOSurface/GLImageBindTest/4.BindTexImage
../../ui/gl/test/gl_test_helper.cc:77: Failure
The difference between expected and actual is 32, which exceeds error, where
expected evaluates to 48,
actual evaluates to 16, and
error evaluates to 0.
 at 0, 0 channel 0
../../ui/gl/test/gl_test_helper.cc:77: Failure
The difference between expected and actual is 32, which exceeds error, where
expected evaluates to 16,
actual evaluates to 48, and
error evaluates to 0.
 at 0, 0 channel 2


I wonder whether Apple either fixed a bug or introduced one in this OS point release.

Miguel, could you please take this? It's the only reason this bot is red right now so we'd like to get it green again somehow. Thanks.