Description of problem:
This test case, taken from one in the grep test suite, causes regexec
incorrectly not to return.

Version-Release number of selected component (if applicable):
2.3.2-50

How reproducible:
100%

#include <regex.h>
#include <stdio.h>
 
int main ()
{
  regex_t rbuf;
  const char *p;
  int err;
  p = "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?"
      "\\9\\8\\7\\6\\5\\4\\3\\2\\1$";
  if ((err = regcomp  (&rbuf, p, REG_NOSUB | REG_EXTENDED))) {
    char errstr[300];
    regerror (err, &rbuf, errstr, sizeof (errstr));
    puts (errstr);
    return err;
  }
  return regexec (&rbuf, "civic", 0, NULL, 0);
}