Rollup of 7 pull requests#80806

Merged

bors merged 18 commits intorust-lang:masterfrom

JohnTitor:rollup-y64z7ph

Jan 8, 2021

Commits on Dec 3, 2020

Commits on Dec 4, 2020

Commits on Dec 26, 2020

Don't panic when an external crate can't be resolved
jyn514
committed

Commits on Jan 8, 2021