https://bugs.winehq.org/show_bug.cgi?id=39787
--- Comment #13 from Henri Verbeet hverbeet@gmail.com --- It does look like a driver issue rather than a Wine issue. The lookup for "glDeleteFencesAPPLE" is normal, it's just the first OpenGL function wined3d tries to load (in load_gl_funcs()). It's fine for the lookup to return NULL, but the lookup itself shouldn't crash. Note that similar lookups earlier in the log work.