Closed
Description
transmute_copy now validates reasonable sizes and panics if not as of #98839, this causes some breakage (detected at the time in #98839 (comment)).
Mostly filing this issue to make sure we add a release notes compat note about this, but I don't expect us to do anything further. Nominating for T-libs-api, though, mostly just for awareness.
cc @tmandry / @joshtriplett -- let's make sure this makes it into 1.64 release notes
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