1 files changed, 59 insertions, 0 deletions
diff --git a/posix/bug-regex24.c b/posix/bug-regex24.c
new file mode 100644
index 0000000000..83ea10bb62
--- /dev/null
+++ b/posix/bug-regex24.c
@@ -0,0 +1,59 @@
+#include <regex.h>
+#include <stdio.h>
+
+#define str "civic"
+
+#define N 10
+static const char *expected[N] =
+  {
+    str, "c", "i", "", "", "", "", "", "", ""
+  };
+
+static int
+do_test (void)
+{
+  regex_t rbuf;
+  static const char pat[] = "\
+^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$";
+
+  int err = regcomp (&rbuf, pat, REG_EXTENDED);
+  if (err != 0)
+    {
+      char errstr[300];
+      regerror (err, &rbuf, errstr, sizeof (errstr));
+      puts (errstr);
+      return err;
+    }
+
+  regmatch_t m[N];
+  err = regexec (&rbuf, str, N, m, 0);
+  if (err != 0)
+    {
+      puts ("regexec failed");
+      return 1;
+    }
+
+  int result = 0;
+  for (int i = 0; i < N; ++i)
+    if (m[i].rm_so == -1)
+      {
+	printf ("m[%d] unused\n", i);
+	result = 1;
+      }
+    else
+      {
+	int len = m[i].rm_eo - m[i].rm_so;
+
+	printf ("m[%d] = \"%.*s\"\n", i, len, str + m[i].rm_so);
+
+	if (strlen (expected[i]) != len
+	    || memcmp (expected[i], str + m[i].rm_so, len) != 0)
+	  result = 1;
+      }
+
+  return result;
+}
+
+#define TIMEOUT 30
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"