Re: [Boost-testing] Beginning tests with QNX 6

From: Bronek Kozicki (brok_at_[hidden])
Date: 2005-10-20 02:24:42

Jim Douglas wrote:
> main() {
> 
>     A   *MyPtr;
>     MyPtr = new B;   // this is perfectly legal and very useful
>     ...
>     delete MyPtr;    // only calls the dtor for A
> }
> 
> In the above example the delete would only clean up the base class A and 
> leave bits of the derived class B lying around in memory causing a 

this is actually undefined behaviour, and "pieces of former B object" 
might be corrupting heap state or the whole thing could just blow up

B.