Split coroutine desugaring kind from source What a coroutine is desugared from (gen/async gen/async) should be separate from where it comes (fn/block/closure).
no_ord_impl
orderable
Session::span_diagnostic
Session::dcx
clippy::needless_borrow
DiagnosticBuilder
BorrowKind::Shallow
Fake
Polonius
-Zpolonius
RegionCtxt