Rollup of 17 pull requests#59075

Closed

Centril wants to merge 39 commits intorust-lang:masterfrom

Commits on Mar 1, 2019

Commits on Mar 4, 2019

Commits on Mar 7, 2019

Adds diagnostic message and UI test.

repnop
authored and
petrochenkov
committed
Improve recovery for missing trait in a trait impl
petrochenkov
committed

Commits on Mar 10, 2019