Rollup of 8 pull requests#57624

Closed

Centril wants to merge 27 commits intorust-lang:masterfrom

Commits on Jan 11, 2019

Add fmt benchmarks
sinkuu
committed

Commits on Jan 12, 2019

Commits on Jan 13, 2019

Add core::iter::once_with
Stjepan Glavina
committed
forbid manually impl'ing one of an object type's marker traits
arielb1
committed
Fix intradoc link and update issue number
Stjepan Glavina
committed
Remove `TokenStream::Tree` variant.
nnethercote
committed
Remove `ThinTokenStream`.
nnethercote
committed
Avoid some `TokenTree`-to-`TokenStream` conversions.
nnethercote
committed
Make privacy checking, intrinsic checking and liveness checking incremental
Zoxc
committed
Fix failing test
Stjepan Glavina
committed

Commits on Jan 14, 2019

Commits on Jan 15, 2019