Created attachment 131505 [details]
crash logs and piglit result json

I was running "piglit run tests/quick results/quick" yesterday and system
suddenly stopped responding at test 36216/39353. I was forced to do 5 second
power switch shut down. Today I ran the test again and it didn't hang the
system but stopped progressing at 38239/39353 where I did Ctrl-C. Attached is
backtrace of crashes. 

$ inxi -G
Graphics:  Card: Advanced Micro Devices [AMD/ATI] Tonga PRO [Radeon R9 285/380]
           Display Server: X.Org 1.19.3 driver: amdgpu
           Resolution: 1920x1080@60.00hz, 1920x1080@60.00hz
           GLX Renderer: Gallium 0.4 on AMD TONGA (DRM 3.15.0 /
4.12.0-rc1-g2ea659a9ef48, LLVM 5.0.0)
           GLX Version: 3.0 Mesa 17.2.0-devel (git-1586768e74)