}
tcx.check_stability(assoc_ty.def_id, Some(ref_id), binding.span);
- dup_bindings.entry(assoc_ty.def_id)
- .and_modify(|prev_span| {
- let mut err = self.tcx().struct_span_lint_node(
- ::rustc::lint::builtin::DUPLICATE_ASSOCIATED_TYPE_BINDINGS,
- ref_id,
- binding.span,
- &format!("associated type binding `{}` specified more than once",
- binding.item_name)
- );
- err.span_label(binding.span, "used more than once");
- err.span_label(*prev_span, format!("first use of `{}`", binding.item_name));
- err.emit();
- })
- .or_insert(binding.span);
+ if speculative {
+ dup_bindings.entry(assoc_ty.def_id)
+ .and_modify(|prev_span| {
+ let mut err = self.tcx().struct_span_lint_node(
+ ::rustc::lint::builtin::DUPLICATE_ASSOCIATED_TYPE_BINDINGS,
+ ref_id,
+ binding.span,
+ &format!("associated type binding `{}` specified more than once",
+ binding.item_name)
+ );
+ err.span_label(binding.span, "used more than once");
+ err.span_label(*prev_span, format!("first use of `{}`", binding.item_name));
+ err.emit();
+ })
+ .or_insert(binding.span);
+ }
Ok(candidate.map_bound(|trait_ref| {
ty::ProjectionPredicate {
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #50589 <https://github.com/rust-lang/rust/issues/50589>
-warning: associated type binding `Item` specified more than once
- --> $DIR/issue-50589-multiple-associated-types.rs:17:39
- |
-LL | fn test() -> Box<Iterator<Item = (), Item = Unit>> {
- | --------- ^^^^^^^^^^^ used more than once
- | |
- | first use of `Item`
- |
- = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
- = note: for more information, see issue #50589 <https://github.com/rust-lang/rust/issues/50589>
-