[Boost-users] Memory leak in zlib iostreams unit

From: Will Bryant (will_at_[hidden])
Date: 2005-09-24 07:22:07

Hi all/Jonathan,

valgrinding my applications that use zlib reveals that the zlib filter 
classes leak memory on destruction, as the call to 
inflateInit2/deflateInit2 is not matched by a corresponding call to 
inflateEnd/deflateEnd.

I notice that boost/iostreams/filter/zlib.hpp has:

    template<typename Alloc>
    zlib_compressor_impl<Alloc>::~zlib_compressor_impl()
    { /*reset(true, false);*/ }

and:

    template<typename Alloc>
    zlib_decompressor_impl<Alloc>::~zlib_decompressor_impl()
    { /*reset(false, false);*/ }

- which I imagine were added in response George M. Garner's note about 
what I assume was the same problem 
(http://lists.boost.org/Archives/boost/2005/03/83379.php).

Uncommenting those calls to reset fixes the memory leaks.  Are they 
meant to be commented out in the release?

Cheers,
Will

-- 
Will Bryant
http://carcino.gen.nz/
will_at_[hidden]
[phone]