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-rw-r--r--gcc/testsuite/g++.dg/ext/offsetof2.C6
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/offsetof2.C b/gcc/testsuite/g++.dg/ext/offsetof2.C
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--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/offsetof2.C
@@ -0,0 +1,6 @@
+// PR c++/85662
+// { dg-do compile { target c++11 } }
+
+struct S { unsigned long x[31]; };
+struct T { bool b; S f; };
+static_assert (__builtin_offsetof (T, f.x[31 - 1]) == __builtin_offsetof (T, f.x[30]), "");