[beta] std: Synchronize access to global env during exec
#55978
Merged
bors merged 2 commits intorust-lang:betafrom Nov 15, 2018
Merged
[beta] std: Synchronize access to global env during `exec`#55978bors merged 2 commits intorust-lang:betafrom
bors merged 2 commits intorust-lang:betafrom