Legacy opengl cause GL_INVALID_OPERATION

[sandsc]

use glBegin glVertex glEnd cause "GL_INVALID_OPERATION error generated. Calling glFlush from the current immediate mode state is invalid. Check glBegin() / glEnd() pairs." message is outputed by gldebugmessagecallback,
it seems that when calls glVertex wglGetProcAddress will be called which calls glFlush implicitly on windows.

see also:

The basic problem is Microsoft's opengl32.dll calls glFlush from wglGetProcAddress()
haskell-opengl/OpenGL#87

[HurricanKai]

I don't think this is anything we can fix? Additionally this Is Legacy OpenGL, which new applications really shouldn't use.

[Redhacker1]

I happen to agree. Legacy OpenGL should IMHO probably stop actually being supported or bindings generated for it if possible

[Beyley]

I happen to agree. Legacy OpenGL should IMHO probably stop actually being supported or bindings generated for it if possible

I dont think we should cut support for something in 2.x because one platform has issues with it