for (;;)
      {
      uint32_t options = 0;                   /* Normally no options */
      PCRE2_SIZE start_offset = ovector[1];   /* Start at end of previous match */

      /* If the previous match was for an empty string, we are finished if we are
      at the end of the subject. Otherwise, arrange to run another match at the
      same point to see if a non-empty match can be found. */

      if (ovector[0] == ovector[1])
        {
        if (ovector[0] == subject_length) break;
        options = PCRE2_NOTEMPTY_ATSTART | PCRE2_ANCHORED;
        }

/* modified: */

    PCRE2_SIZE start_offset = 0;

    for (;;)
      {

      uint32_t options = 0;                         /* Normally no options */
      PCRE2_SIZE old_start_offset = start_offset;   /* Save old start offset for later comparison */
      start_offset = ovector[1];                    /* Start at end of previous match */

      /* If the previous match was for an empty string, we are finished if we are
      at the end of the subject. Otherwise, arrange to run another match at the
      same point to see if a non-empty match can be found. */

      if (old_start_offset == ovector[1])
        {
        if (ovector[1] == subject_length) break;
        options = PCRE2_NOTEMPTY_ATSTART | PCRE2_ANCHORED;
        }