char *str_dup(const char *str ) problem

[oioi]

My problem is this...Every time a character quits from my mud, it crashes.

I ran the debugger to find the exact line it was falling out...and it was in
the do_quit function when it calls the str_dup function...here...

 /*
     * After extract_char the ch is no longer valid!
     */
    save_char_obj( ch );
    id = ch->id;
    d = ch->desc;
 d->host = str_dup(ch->pcdata->host);
    extract_char( ch, TRUE );
    if ( d != NULL )
 close_socket( d );


Then, when I stepped into the str_dup function, it craps out with an "Access
violation"...here...


char *str_dup( const char *str )
{
    char *str_new;

    if ( str[0] == '\0' )       /* Right here, on this line, is where it
craps out*/
 return &str_empty[0];

    if ( str >= string_space && str < top_string )
 return (char *) str;

    str_new = alloc_mem( strlen(str) + 1 );
    strcpy( str_new, str );
    return str_new;
}


The mud was running fine, but for a problem with do_outfit that had to do
with the create_object and a null pObjIndex pointer....

but when I fixed that (a temporary fix, by basically commenting out the
outfit command)...this started happening.  When before I could quit out with
no problem...

and now...even when I uncomment the do_outfit.. it is still having this
problem with the access violation.

Honestly, I am stumped.