Rollup of 3 pull requests#79614

Merged

bors merged 10 commits intorust-lang:masterfrom

GuillaumeGomez:rollup-15usd7e

Dec 2, 2020

Commits on Nov 28, 2020

Derive `Debug` for `DebugInfo`
jryans
committed

Commits on Nov 30, 2020

Warn if `dsymutil` returns an error code
jryans
committed

Commits on Dec 1, 2020