Rollup of 7 pull requests#92049

Closed

matthiaskrgr wants to merge 20 commits intorust-lang:masterfrom

matthiaskrgr:rollup-vhntztu

Commits on Dec 12, 2021

Show the unused type for `unused_results` lint
camelid
committed

Commits on Dec 15, 2021

miri: lift restriction on extern types being the only field in a struct
tmiasko
committed

Commits on Dec 17, 2021