Fix #18604: next_power_of_two should panic on overflow#45754

Merged

bors merged 3 commits intorust-lang:masterfrom

scottmcm:checked-npot

Nov 5, 2017

Commits on Nov 4, 2017

Commits on Nov 5, 2017

Use Add::add for overflow checks instead of [rustc_inherit_overflow_checks]
scottmcm
committed