In this build:
https://ci.chromium.org/buildbot/chromium.gpu.fyi/Linux%20Release%20%28AMD%20R7%20240%29/3654

multiple Chrome-based tests started to fail. The GPU process crashes with this assertion failure:

[29989:29989:1212/181000.701888:ERROR:gles2_cmd_decoder.cc(2586)] [.CompositorWorker-0x386ad5a7e200]GL ERROR :GL_INVALID_OPERATION : GLES2DecoderImpl::DoBindTexImage2DCHROMIUM: <- error from previous GL command
[29904:29923:1212/181000.705931:WARNING:simple_synchronous_entry.cc(1170)] Could not open platform files for entry.
[29989:29989:1212/181000.719198:ERROR:gles2_cmd_decoder.cc(2586)] [.CompositorWorker-0x386ad5a7e200]GL ERROR :GL_INVALID_OPERATION : GLES2DecoderImpl::DoBindTexImage2DCHROMIUM: <- error from previous GL command
[29989:29989:1212/181000.737420:FATAL:feature_info.cc(1617)] Check failed: ::gl::g_current_gl_context_tls->Get()->Api->glGetErrorFn() == static_cast<GLuint>(0x0) (1282 vs. 0)
#0 0x55b36e4b0c2c base::debug::StackTrace::StackTrace()
#1 0x55b36e4d085c logging::LogMessage::~LogMessage()
#2 0x55b36f78c47c gpu::gles2::FeatureInfo::InitializeFloatAndHalfFloatFeatures()
#3 0x55b36f786022 gpu::gles2::FeatureInfo::InitializeFeatures()
#4 0x55b36f87531d gpu::gles2::GLES2DecoderImpl::HandleGetRequestableExtensionsCHROMIUM()
#5 0x55b36f892d78 gpu::gles2::GLES2DecoderImpl::DoCommandsImpl<>()
#6 0x55b36f76ea8f gpu::CommandBufferService::Flush()
#7 0x55b36fccb4b8 gpu::CommandBufferStub::OnAsyncFlush()
...

Looking at the blame list, the most likely cause is:

GLX: implement GLSurface PresentationCallback
https://chromium-review.googlesource.com/809704

It sounds to me like those changes are causing an OpenGL error which is propagating through the system, causing later calls to fail.

penghuang@ can you please take this? Unfortunately we don't have tryservers for this configuration but you can log on to the bot. If there's an easy way to blacklist your new changes on Linux AMD that would be the most expedient way to get things back to a working state.

Thanks.