id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
4846,streaming gregorian::date objects to std::cout leaks memory,robbie@…,az_sw_dude,"there seems to be a problem streaming boost::gregorian::date objects to std::cout, but not to std::ostringstream / whilst noting that this could be a valgrind issue

consider the following code

{{{
// build    : $ g++ -ggdb -Wall -pedantic -Weffc++ test.cc -o test
// run      : $ valgrind ./test
// compiler : g++ (Ubuntu 4.4.3-4ubuntu5) 4.4.3
// library  : Boost 1.44.0

#include <iostream>           // standard io
#include <sstream>            // string-streams
#include <boost/date_time/gregorian/gregorian.hpp>

int
main()
{
  namespace bg = boost::gregorian;                // namespace alias
  const bg::date today(2010, bg::Nov, 12);        // 'const' not significant
  std::ostringstream oss;
  oss << today;
  std::cout << ""today (1) : "" << oss.str() << std::endl;  // okay
  std::cout << ""today (2) : "" << today     << std::endl;  // faulty
}
}}}

valgrind output

{{{
==15924== Memcheck, a memory error detector
==15924== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==15924== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
==15924== Command: ./test
==15924==
today (1) : 2010-Nov-12
today (2) : 2010-Nov-12
==15924==
==15924== HEAP SUMMARY:
==15924==     in use at exit: 1,544 bytes in 26 blocks
==15924==   total heap usage: 64 allocs, 38 frees, 4,609 bytes allocated
==15924==
==15924== LEAK SUMMARY:
==15924==    definitely lost: 0 bytes in 0 blocks
==15924==    indirectly lost: 0 bytes in 0 blocks
==15924==      possibly lost: 568 bytes in 19 blocks
==15924==    still reachable: 976 bytes in 7 blocks
==15924==         suppressed: 0 bytes in 0 blocks
==15924== Rerun with --leak-check=full to see details of leaked memory
==15924==
==15924== For counts of detected and suppressed errors, rerun with: -v
==15924== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 4 from 4)
}}}
",Bugs,new,To Be Determined,date_time,Boost 1.44.0,Problem,,,