Beta next#39140

Merged

alexcrichton merged 5 commits intorust-lang:betafrom

brson:beta-next

Jan 17, 2017

Commits on Jan 17, 2017

Auto merge of #38427 - brson:relnotes, r=alexcrichton

bors
authored and
brson
committed
1.15 release notes
brson
committed
Improve the warning cycle for `use $crate;`.

jseyfried
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brson
committed
fix function arguments in constant promotion

arielb1
authored and
brson
committed
rustbuild: Don't enable debuginfo in rustc

alexcrichton
authored and
brson
committed