Fix #[rustc_macro_transparency] giving two errors

JonathanBrouwer · JonathanBrouwer · commit 66c5c7c44037 · 2025-06-29T11:54:01.000+02:00
Signed-off-by: Jonathan Brouwer &lt;jonathantbrouwer@gmail.com&gt;
diff --git a/compiler/rustc_parse/src/validate_attr.rs b/compiler/rustc_parse/src/validate_attr.rs
@@ -303,6 +303,7 @@ fn emit_malformed_attribute(
             | sym::must_use
             | sym::track_caller
             | sym::export_name
+            | sym::rustc_macro_transparency
     ) {
         return;
     }
diff --git a/tests/ui/attributes/malformed-attrs.rs b/tests/ui/attributes/malformed-attrs.rs
@@ -44,7 +44,6 @@
 //~| WARN this was previously accepted by the compiler
 #[rustc_macro_transparency]
 //~^ ERROR malformed
-//~| ERROR malformed
 #[repr]
 //~^ ERROR malformed
 #[rustc_as_ptr = 5]
diff --git a/tests/ui/attributes/malformed-attrs.stderr b/tests/ui/attributes/malformed-attrs.stderr

Original file line number	Diff line number	Diff line change
`@@ -303,6 +303,7 @@ fn emit_malformed_attribute(`
`303`	`303`	`\| sym::must_use`
`304`	`304`	`\| sym::track_caller`
`305`	`305`	`\| sym::export_name`
	`306`	`+ \| sym::rustc_macro_transparency`
`306`	`307`	`) {`
`307`	`308`	`return;`
`308`	`309`	`}`