[Mesa-dev] [Bug 43896] Mesa assembly breaks Super Meat Boy, Shank

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43896

--- Comment #2 from Henri Verbeet <hverbeet at gmail.com> 2011-12-17 05:16:28 PST ---
(In reply to comment #1)
> There is a bug in the 32-bit mesa build, when asm is enabled -
> glXGetProcAddress returns non-NULL for any string starting with "gl".
> 
> In this case the app calls glXGetProcAddress with the incorrect function name,
> e.g. "glCreateShaderObject", mesa incorrectly returns non-NULL, the app calls
> it.
Sounds like a bug in the application to me. From the GLX 1.4 spec (though
that's certainly not new in 1.4):

"A non-NULL return value for glXGetProcAddress does not guarantee that an
extension function is actually supported at runtime. The client must also query
glGetString() or glXQueryExtensionsString to determine if an extension is
supported by a particular context."

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