+
+#if defined(_WIN32)
+ /* This is a special case for Windows in the event that
+ * wglGetProcAddress is called between glBegin/End().
+ *
+ * The MS opengl32.dll library apparently calls glFlush from
+ * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
+ * will dispatch to _mesa_generic_nop() and we'll generate a
+ * GL_INVALID_OPERATION error.
+ *
+ * The specific case which hits this is piglit's primitive-restart
+ * test which calls glPrimitiveRestartNV() inside glBegin/End. The
+ * first time we call glPrimitiveRestartNV() Piglit's API dispatch
+ * code will try to resolve the function by calling wglGetProcAddress.
+ * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
+ * will fail causing the test to fail. By suppressing the error, the
+ * assertion passes and the test continues.
+ */
+ SET_Flush(table, nop_glFlush);
+#endif