Rollup merge of rust-lang#121545 - gvozdvmozgu:fix-attribute-validation-associated-items, r=fmease

fix attribute validation on associated items in traits rust-lang#121537, fixed attribute validation on associated items in traits

Author: fmease

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -1527,6 +1527,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
  generics,
  body.as_deref(),
  );
+ walk_list!(self, visit_attribute, &item.attrs);
  self.visit_fn(kind, item.span, item.id);
  }
  AssocItemKind::Type(_) => {

tests/ui/attributes/validation-on-associated-items-issue-121537.rs

@@ -0,0 +1,7 @@
+trait MyTrait {
+ #[doc = MyTrait]
+ //~^ ERROR attribute value must be a literal
+ fn myfun();
+}
+
+fn main() {}

tests/ui/attributes/validation-on-associated-items-issue-121537.stderr

@@ -0,0 +1,8 @@
+error: attribute value must be a literal
+ --> $DIR/validation-on-associated-items-issue-121537.rs:2:13
+ |
+LL | #[doc = MyTrait]
+ | ^^^^^^^
+
+error: aborting due to 1 previous error
+