[Bug libstdc++/24196] Using string instances to pass arguments to dlls fails

["johnw at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #21 from johnw at gnu dot org  2009-10-25 05:40 -------
I'm actually getting this same error on Snow Leopard (Mac OS X 10.6.0).  It's
pretty easy to reproduce with Boost (1.40):

#include <string>
#include <sstream>

#include <boost/variant.hpp>

int main()
{
  std::ostringstream buf;
  boost::variant<bool, std::string> data;
  data = buf.str();
  data = false;
  return 0;
}

$ g++ -I/opt/local/include -o bug bug.cc

What happens here is that ostringstream, which is in libstdc++.dylib, returns
an empty string which does not match the notion of empty string compiled into
my executable; thus when Boost tries to deconstruct the string it stored in
order to store the boolean, it crashes trying to deallocate a foreign lib's
empty string.

This doesn't happen with the same Boost using the stock compiler (g++ 4.2).

John


-- 

johnw at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |johnw at gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24196