1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/parse/offsetof6.C b/gcc/testsuite/g++.dg/parse/offsetof6.C
new file mode 100644
index 000000000..0e07a5380
--- /dev/null
+++ b/gcc/testsuite/g++.dg/parse/offsetof6.C
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+
+// From PR28573
+
+struct A
+{
+  char d[44];
+  char &operator [] ( int indx ) { return d[indx]; }
+};
+
+struct B
+{
+  A a;
+};
+
+int main()
+{
+  return __builtin_offsetof(B, a[0]); /* { dg-error "cannot apply.*offsetof" } */
+}