1 files changed, 5 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaDeclObjC.cpp b/clang/lib/Sema/SemaDeclObjC.cpp
index 9b5f0d7bb07..5ab1efec037 100644
--- a/clang/lib/Sema/SemaDeclObjC.cpp
+++ b/clang/lib/Sema/SemaDeclObjC.cpp
@@ -1975,6 +1975,11 @@ void Sema::ActOnDefs(Scope *S, DeclPtrTy TagD, SourceLocation DeclStart,
     Diag(DeclStart, diag::err_undef_interface) << ClassName;
     return;
   }
+  if (LangOpts.ObjCNonFragileABI) {
+    Diag(DeclStart, diag::err_atdef_nonfragile_interface);
+    return;
+  }
+  
   // Collect the instance variables
   CollectIvars(Class, dyn_cast<RecordDecl>(TagD.getAs<Decl>()), Context, Decls);