Rollup of 6 pull requests#89992

Closed

matthiaskrgr wants to merge 12 commits intorust-lang:masterfrom matthiaskrgr:rollup-wjbpitp

+360-342

Commits on Aug 15, 2021

Make all proc-macro back-compat lints deny-by-default
Aaron1011
committed

Commits on Sep 19, 2021

resolve: Use NameBinding for local variables and generic parameters
petrochenkov
committed

Commits on Oct 16, 2021

Fix ICE with let...else and ref mut
JohnTitor
committed

Commits on Oct 17, 2021

rustc_span: Ident::invalid -> Ident::empty
petrochenkov
committed
Nicer error message if the user attempts to do let...else if
est31
committed
Check implementing type for #[doc(hidden)]
pierwill
committed
Rollup merge of rust-lang#88041 - Aaron1011:deny-proc-macro-hack, r=wesleywiser
matthiaskrgr
authored
Rollup merge of rust-lang#89100 - petrochenkov:localbind, r=cjgillot
matthiaskrgr
authored
Rollup merge of rust-lang#89965 - JohnTitor:fix-let-else-ice-with-ref-mut, r=petrochenkov
matthiaskrgr
authored
Rollup merge of rust-lang#89974 - est31:let_else_if_error, r=nagisa
matthiaskrgr
authored
Rollup merge of rust-lang#89987 - pierwill:fix-85526-docs-hidden-assoc, r=GuillaumeGomez
matthiaskrgr
authored
Rollup merge of rust-lang#89990 - petrochenkov:idempty, r=wesleywiser
matthiaskrgr
authored