---------------------------------------
cfg_syn_scan.c after my debug modifications
--------------------------------------
case 35:
/* rule 35 can match eol */
YY_RULE_SETUP
#line 246 "cfg_syn_scan.l"
{
    if (yytext[0] == cQuoteOpen || yytext[0] == cQuoteClose) {
        if (cQuoteOpen != cQuoteClose)
            nQuoteOpen += (yytext[0] == cQuoteOpen ? 1 : -1);
        else
            nQuoteOpen = ((nQuoteOpen + 1) % 2);
    }
    if (yytext[0] == cQuoteClose && nQuoteOpen == 0) {
        *cpStr = '\0';
        fprintf(stderr, "Line is ****%s****, len=%d\n", caStr, strlen(caStr));
        fprintf(stderr, "Pointer is = %p\n", yylval);
        yylval->cpString = NULL;
        yylval->cpString = (char *)malloc( strlen(caStr)+1 );
        if (yylval->cpString) strcpy(yylval->cpString,caStr);
        BEGIN(INITIAL);
        return T_STRING;
    }
    else
        *cpStr++ = yytext[0];
}
        YY_BREAK
	case YY_STATE_EOF(SS_FQ):

----------------------------------------
Output from my own debug statements
----------------------------------------
Line is ****
    prefix(
        prefix="[%Y-%m-%d, %H:%M:%S] ",
        timezone=local
    )
     -> my_own_node(
             filename="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
             threshold=500,
             timezone=local,
             prefix="[%Y-%m-%d, %H:%M:%S] "
        )
     -> {
        critical: filter(
               regex="XXXXXXX",
               negate=1,
               nocase=0
       )
        -> buffer(
               size=131072,
               interval=180,
               levelflush=0
       )
       -> smtp(
               progname="XXXXXXXXXXXXXX",
               localhost="XXXXXXXXXXXXXXx",
               localuser="XXXXXX",
               host="XXXXXXXXXXXXXXXXxx",
               rcpt=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXx,
               from=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX,
               subject="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
       );
       file(
            path="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXx",
            trunc=0,
            perm=0644
       )
    }
****, len=1036
Pointer is = (nil)
Segmentation fault (core dumped)
-------------------------------------------------------------------------------