Detect bare blocks with type ascription that were meant to be a struct literal

Address part of #34255.

Potential improvement: silence the other knock down errors in
`issue-34255-1.rs`.

compiler/rustc_interface/src/util.rs

@@ -810,6 +810,7 @@ impl<'a> MutVisitor for ReplaceBodyWithLoop<'a, '_> {
                 id: resolver.next_node_id(),
                 span: rustc_span::DUMMY_SP,
                 tokens: None,
+                could_be_bare_literal: false,
             }
         }