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-rw-r--r--compiler/rustc_parse/src/validate_attr.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_parse/src/validate_attr.rs b/compiler/rustc_parse/src/validate_attr.rs
index 11cff88ba4f..cc95e3d6567 100644
--- a/compiler/rustc_parse/src/validate_attr.rs
+++ b/compiler/rustc_parse/src/validate_attr.rs
@@ -304,6 +304,7 @@ fn emit_malformed_attribute(
             | sym::track_caller
             | sym::link_name
             | sym::export_name
+            | sym::rustc_macro_transparency
     ) {
         return;
     }