[boost] Subject: Re: [shared_ptr] Where is the bug?

Hi, Well the bug is in the fact the when you allocated: B* b = new X(); You have allocated an int extra, thus when you call: delete b; You are only destructing what was allocated by B, which cause a sizeof(int) bytes memory leak each time you do this. Just use a virtual destructor on virtual ~B() ... and that would take care of it all. With best regards Kasra Nassiri