Fix undefined behavior in interpreter mixed union upcast #15042
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HertzDevil
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oprypin
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Sep 27, 2024
ysbaddaden
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Fixes #15041.
It also changes the
move_toin the tuple indexers tomove_from, although in practice these don't exhibit unexpected behavior, because mostmemcpyimplementations copy data from lower addresses to higher addresses, and these calls move data to a lower address.