Rollup of 8 pull requests#68803

Merged

bors merged 19 commits intorust-lang:masterfrom

Dylan-DPC-zz:rollup-b4x6ghj

Feb 3, 2020

Commits on Jan 31, 2020

Commits on Feb 1, 2020

Do not ICE in `type-alias-impl-trait` with save-analysis
JohnTitor
committed

Commits on Feb 2, 2020

Commits on Feb 3, 2020