Rollup merge of #155829 - scrabsha:push-kwlqypwmnpul, r=mejrs

rustc_attr_parsing: use a `try {}` in `or_malformed`

Author: jhpratt

compiler/rustc_attr_parsing/src/attributes/diagnostic/mod.rs

@@ -236,9 +236,11 @@ fn parse_directive_items<'p, S: Stage>(
         }}
 
         macro or_malformed($($code:tt)*) {{
-            let Some(ret) = (||{
-                Some($($code)*)
-            })() else {
+            let Some(ret) = (
+                try {
+                    $($code)*
+                }
+            ) else {
                 malformed!()
             };
             ret