Rollup merge of #58332 - RalfJung:miri-copy-nonoverlapping, r=oli-obk
Rollup merge of #58332 - RalfJung:miri-copy-nonoverlapping, r=oli-obk

operand-to-place copies should never be overlapping

This seems to just work (verified with the Miri test suite).

r? @oli-obk

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust