Better suggestions when user tries to collect into an unsized `[_]`#91443

Merged

bors merged 2 commits intorust-lang:masterfrom compiler-errors:bad_collect_into_slice

Feb 10, 2022

+106-12

Commits on Feb 9, 2022

Allow substitutions in rustc_on_unimplemented predicate
compiler-errors
committed
Suggest collecting into Vec<_> when collecting into [_]
compiler-errors
committed