The standard states:
"GL_INVALID_OPERATION is generated if glGetString is executed between the execution of glBegin and the corresponding execution of glEnd.", but invocation of the interface glGetString(GL_VERSION) between glBegin and glEnd does not generate GL_INVALID_OPERATION error.
I think this is due to indirect rendering/glx. __indirect_glGetString uses a local cache and doesn't check for this error itself. Not sure though how to fix...
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