Fixes for beta#45986

Merged

bors merged 3 commits intorust-lang:betafrom

arielb1:beta-next

Nov 14, 2017

Commits on Nov 14, 2017

Backported merge of #45785 - arielb1:unsafe-fixes, r=eddyb

bors
authored and
arielb1
committed
Backported merge of #45890 - arielb1:self-first, r=eddyb

bors
authored and
arielb1
committed
check_unsafety: fix unused unsafe block duplication
arielb1
committed