Make assignments to `Copy` union fields safe#42083

Merged

bors merged 2 commits intorust-lang:masterfrom petrochenkov:safeassign

May 26, 2017

+62-7

Commits on May 25, 2017

Make assignments to Copy union fields safe
petrochenkov
committed
Use parameter environment associated with field use, not field definition
petrochenkov
committed