--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-19.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,27 @@
+/* PR middle-end/92014 - bogus warning: writing 8 bytes into a region
+   of size 1 in timezone/zic.c
+   { dg-do compile }
+   { dg-options "-O2 -Wall" } */
+
+struct
+{
+  char *s1, *s2;
+  char c;
+} z;
+
+
+void f (char **a, int i, int j)
+{
+  char * cp = __builtin_strchr (a[i], '%');
+
+  if (cp && *++cp != 's')
+    return;
+
+  z.s1 = __builtin_strdup (a[i]);
+  if (!z.s1) __builtin_abort ();
+
+  z.s2 = __builtin_strdup (a[j]);
+  if (!z.s2) __builtin_abort ();
+
+  z.c = cp ? *cp : '\0';    // { dg-bogus "\\\[-Wstringop-overflow" }
+}