Make `std::fs::copy` attempt to create copy-on-write clones of files on MacOS#59883

Merged

bors merged 1 commit intorust-lang:masterfrom ebarnard:clonefile

May 3, 2019

+71-21

Commits on May 2, 2019

Make std::fs::copy attempt to create copy-on-write clones of files on MacOS.
ebarnard
committed