Vulnerability Development: Regex or Progress? Whos fault?

[KF <dotslash () snosoft com>]

I am just poking a some more progress binaries this weekend and I ran 
across this issue. Based on the gdb dumps I thought that something may 
be wrong with regex. Not sure though.  libg++-2.7.2.8-9.src.rpm Said it 
was from redhat 5.2 on rpmfind.net but it is installed on my 7.2 box for 
some reason.
[root () ghetto dotslash]# cat /etc/redhat-release
Red Hat Linux release 7.2 (Enigma)
[root () ghetto dotslash]# rpm -qa | grep libg
libg++-2.7.2.8-9

[root () ghetto bin]# gdb -q ./showcfg
(gdb) r `perl -e 'print "A" x 9000'`
Starting program: /home/dlc/bin/./showcfg `perl -e 'print "A" x 9000'`

Error: Cannot open the configuration file

Program received signal SIGSEGV, Segmentation fault.
__libc_free (mem=0x41414141) at malloc.c:3136
3136    malloc.c: No such file or directory.
       in malloc.c
(gdb) bt
#0  __libc_free (mem=0x41414141) at malloc.c:3136
#1  0x400584ee in Regex::~Regex (this=0x40078b98, __in_chrg=2) at 
Regex.cc:42
#2  0x400587d1 in global destructors keyed to Regex::Regex () at 
Regex.cc:149
#3  0x40057950 in __do_global_dtors_aux () from /usr/lib/libg++.so.2.7.2
#4  0x400770a5 in _fini () from /usr/lib/libg++.so.2.7.2
#5  0x4000de72 in _dl_fini () at eval.c:41
#6  0x400ed42b in exit (status=65535) at exit.c:54
#7  0x08073b78 in main () at eval.c:41
#8  0x400d8507 in __libc_start_main (main=0x80739f0 <main>, argc=2, 
ubp_av=0xbfffd844, init=0x804beb0 <_init>,
   fini=0x808f2ec <_fini>, rtld_fini=0x4000dc14 <_dl_fini>, 
stack_end=0xbfffd83c) at ../sysdeps/generic/libc-start.c:129

heres the snippet from Regex.cc
Regex::~Regex()
{
 if (buf->buffer) free(buf->buffer);
 if (buf->fastmap) free(buf->fastmap);
 if (buf->translate) free (buf->translate);

 if (reg->start)
   free (reg->start);
 if (reg->end)
   free (reg->end);

 delete(buf);
 delete(reg);
}

-KF