Rollup of 7 pull requests#52567

Closed

emilyalbini wants to merge 26 commits intorust-lang:masterfrom

emilyalbini:rollup

Commits on Jul 18, 2018

rustc: Remove a workaroudn in ThinLTO fixed upstream
alexcrichton
committed
Reword when `_` couldn't be inferred
Esteban Küber
committed

Commits on Jul 19, 2018

Commits on Jul 20, 2018