Built piglit from git-master (67675034486e29ecbc4a4da2fc74b184d7d11cb8) and wanted to run the testsuite on my PowerMac G5 + Radeon HD 6450 (ppc64, big endian). However 2 sanity tests fail (with mesa 18.1.5 and mesa 18.0.5). This might be a regression in piglit, 'cause piglit passed sanity tests on the same system at the time mesa 18.0.0 was released.
For more info see bug #107448.
/root/build/piglit/bin/shader_runner /root/build/piglit/test/spec/arb_tessellation_shader/execution/sanity.shader_test -auto -fbo
Probe color at (0,0)
Expected: 0 255 0 255
Observed: 25 25 25 25
Test failure on line 57
Mesa: User error: GL_INVALID_ENUM in lGetFramebufferAttachmentParameteriv(invalid attachment GL_NONE)
/root/build/piglit/bin/glsl-1.50-transform-feedback-builtins -auto -fbo
Incorrect data for 'gl_Layer' output 0. Expected 1, got 16777216.
Incorrect data for 'gl_Layer' output 1. Expected 3, got 50331648.
Incorrect data for 'gl_Layer' output 2. Expected 5, got 83886080.
Incorrect data for 'gl_ViewportIndex' output 0. Expected 1, got 16777216.
Incorrect data for 'gl_ViewportIndex' output 1. Expected 2, got 33554432.
Incorrect data for 'gl_ViewportIndex' output 2. Expected 3, got 50331648.
Failing sanity is almost certainly a driver bug, not a piglit bug.