Rollup of 10 pull requests#62035

Closed

Centril wants to merge 44 commits intorust-lang:masterfrom

Centril:rollup-zq3mvlu

Commits on May 28, 2019

rustc-book: Update the rustc/clang compatibility table for xLTO.
michaelwoerister
committed

Commits on Jun 9, 2019

Changed the error message to more clearly explain what is allowed
Andrew
committed
changed the language of the error message to make it more clear
Andrew
committed

Commits on Jun 20, 2019

Commits on Jun 21, 2019