[beta] Process backports#50224

Merged

bors merged 4 commits intorust-lang:betafrom

pietroalbini:beta-backports

Apr 25, 2018

Commits on Apr 25, 2018

Only warn on erroneous promoted constants

oli-obk
authored and
pietroalbini
committed
always optimize test

oli-obk
authored and
pietroalbini
committed
Warn on all erroneous constants

oli-obk
authored and
pietroalbini
committed
Rename ui test flag compile-pass to must-compile-successfully
pietroalbini
committed