[Custom Descriptors] Fix shared GTO placeholders#7907
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When we optimize a descriptor to describe a placeholder type because the original described type no longer needs a descriptor, we were not previously ensuring that the sharedness of the placeholder matched the sharedness of the descriptor type. Make sure the shareness matches to avoid validation errors when rebuilding the types.
kripken
approved these changes
Sep 19, 2025
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When we optimize a descriptor to describe a placeholder type because the
original described type no longer needs a descriptor, we were not
previously ensuring that the sharedness of the placeholder matched the
sharedness of the descriptor type. Make sure the shareness matches to
avoid validation errors when rebuilding the types.