Rollup of 9 pull requests#87347

Merged

bors merged 26 commits intorust-lang:masterfrom

GuillaumeGomez:rollup-ke92xxc

Jul 21, 2021

Commits on Jul 16, 2021

avoid temporary vectors
matthiaskrgr
committed

Commits on Jul 17, 2021

Commits on Jul 19, 2021

Commits on Jul 20, 2021

Fix typo in compile.rs
Chinmay Deshpande
authored
Get back the more precise suggestion spans of old regionck
oli-obk
committed
Fix NixOS detection
oxalica
committed
Add long explanation for E0722
midgleyc
committed

Commits on Jul 21, 2021