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BZLZHH
764a44f589
glMapBufferRange and glMapNamedBufferRange rejected an access of zero with INVALID_ENUM. Zero is a perfectly well-formed bitfield value - it contains no invalid flags - and what it violates is the separate rule that a mapping has to ask for read or write access, which GL reports as INVALID_OPERATION. Both callers already checked that rule immediately after, so the validator was reporting the wrong error for a case its callers were about to handle correctly. direct_state_access.buffers_errors passes, which puts the whole buffers group at 4 of 4 on both backends.