[C++-sig] Memory Leaks In VS.NET 2003 With BOOST_PYTHON_MODULE

Ralf W. Grosse-Kunstleve rwgk at yahoo.com
Thu Oct 13 17:59:14 CEST 2005

--- mjkeyes at sbcglobal.net wrote:

> Hey again, I'm back.

Hi Arnold! :)

> Here is some pseudo-code of what I'm doing:

Could you please turn this into a self-contained reproducer? Please explain
exactly how you compile and link. Note that you have to be very careful to not
mix debug and release builds under Windows.

> class A
> {
> public:
>   void SetString(const std::string &sVal)
>   {
>     m_sString = sVal; <--- Memory leak

I am doing things like this all the time and I am sure it doesn't leak for me.

>   }
>   void DoStuff()
>   {
>     SetString(msc_sString);
>   }
> protected:
>   static const std::string msc_sString;
> }

Probably a side issue: do you really want "static" here?

> class B
> {
> public:
>   object CreateClassA()
>   {
>     return object(new CreateClassA()); <---- memory leak

What is this? Does this even compile?
In any event, of course you get a memory leak if you use new like that.
Ideally, you don't have any "unencapsulated" new in your code. Always use
boost::shared_ptr<T>(new T) or std::auto_ptr<>(new T) or any other smart

> Any suggestions?  I'm not getting any errors from the interpreter.

We need a complete reproducer.


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