rustc_span::SPAN_DEBUG.swap(&(span_debug as fn(_, &mut fmt::Formatter<'_>) -> _));
rustc_hir::def_id::DEF_ID_DEBUG.swap(&(def_id_debug as fn(_, &mut fmt::Formatter<'_>) -> _));
TRACK_DIAGNOSTICS.swap(&(track_diagnostic as fn(&_)));
- rustc_middle::ty::RESOLVE_INSTANCE.swap(&(rustc_ty::instance::resolve_instance as _));
}