1 files changed, 5 insertions, 3 deletions
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index ac83a9b156e..50951ad6022 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -5394,9 +5394,11 @@ UuidAttr *Sema::mergeUuidAttr(Decl *D, const AttributeCommonInfo &CI,
   if (const auto *UA = D->getAttr<UuidAttr>()) {
     if (UA->getGuid().equals_lower(Uuid))
       return nullptr;
-    Diag(UA->getLocation(), diag::err_mismatched_uuid);
-    Diag(CI.getLoc(), diag::note_previous_uuid);
-    D->dropAttr<UuidAttr>();
+    if (!UA->getGuid().empty()) {
+      Diag(UA->getLocation(), diag::err_mismatched_uuid);
+      Diag(CI.getLoc(), diag::note_previous_uuid);
+      D->dropAttr<UuidAttr>();
+    }
   }
 
   return ::new (Context) UuidAttr(Context, CI, Uuid);