1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/objc.dg/naming-4.m b/gcc/testsuite/objc.dg/naming-4.m
new file mode 100644
index 000000000..9a85229f6
--- /dev/null
+++ b/gcc/testsuite/objc.dg/naming-4.m
@@ -0,0 +1,27 @@
+/* Testing for detecting duplicate ivars. */
+/* { dg-do compile } */
+
+typedef struct S { int i; } NSDictionary;
+
+@interface A 
+{
+    NSDictionary * _userInfo;
+}
+@end
+
+@interface B : A
+{
+    NSDictionary * _userInfo;	/* { dg-error "duplicate member" } */
+    NSDictionary * _userInfo;	/* { dg-error "duplicate member" } */
+}
+@end
+
+@interface C : A
+@end
+
+@interface D : C
+{
+    NSDictionary * _userInfo;   /* { dg-error "duplicate member" } */
+    NSDictionary * _userInfo;   /* { dg-error "duplicate member" } */
+}
+@end