I'm getting the aforementioned error from all of the glColor functions I try,
example code:

m_context = SDL_GL_CreateContext( window );
if(!m_context) exit(3);
SDL_GL_MakeCurrent(window, m_context);

initializeGlew();
glClearColor(.5, .75, .93, 1);  checkGLerrors("glClearColor");
glColor4f(1, 1, 1, 1);          checkGLerrors("glColor4f");

This is similar to bug #48535, except that it is happening in amdgpu instead of
mesa.