🚀 go-pugleaf

Steve Johns (johns@adwyer.stx.com) wrote:
> The following simple program compiles and links with gcc 2.6.3 and
> libg++2.6.2, but core dumps at run time.  I'm running on IRIX 5.2.
> On a different machine, with gcc 2.7.0, the program works fine.

Do you happen to know on which line it core dumps on?  Try compile
with "-g" (debugging info), and go into any debugger.  If you have
gdb (GNU debugger), try type 'backtrace' at the prompt.  It will give
you the call stack sequence.

> Can anyone tell me why this might be?  
>MyString::MyString(const MyString& source){   // copy constructor
>        len = source.len;
>        delete str_ptr;
>        str_ptr = new  char[len +1];
>        strcpy(str_ptr, source.str_ptr);
>}

Ok, I'll try.  Everything seems simple enough, except for this one.
This is a *copy* *constructor*.  I.e. it is constructing a NEW object.
So, exactly what are you 'delete'ing?  What does str_ptr point to that
you must delete it?  On some systems, it's not a problem to delete
anything you want.  I've even tried 'delete (void *)0' on a linux machine
and nothing happened.  Maybe the IRIX is not so forgiving?  Just
an observation, mind you.  Can't tell what the problem is until I can
see the log from the debugger.  Hope I gave you some ideas as to where
to start looking.  Good luck...
--jc
--
Jimen Ching (WH6BRR)      jching@aloha.com     wh6brr@uhm.ampr.org