Rollup of 7 pull requests#59606

Merged

bors merged 17 commits intorust-lang:masterfrom

Apr 1, 2019

Commits on Mar 9, 2019

fixes rust-lang#56766
Saleem Jaffer
committed

Commits on Mar 13, 2019

adding test
Saleem Jaffer
committed
tidy test
Saleem Jaffer
committed

Commits on Mar 20, 2019

Add a -Z time option which prints only passes which runs once
Zoxc
committed

Commits on Mar 29, 2019

Suggest using anonymous lifetime in `impl Trait` return
estebank
committed

Commits on Mar 31, 2019

Commits on Apr 1, 2019