[Boost-bugs] [Boost C++ Libraries] #4846: streaming gregorian::date objects to std::cout leaks memory

Subject: [Boost-bugs] [Boost C++ Libraries] #4846: streaming gregorian::date objects to std::cout leaks memory
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-11-12 13:07:30

#4846: streaming gregorian::date objects to std::cout leaks memory
---------------------------------+------------------------------------------
 Reporter:  robbie@…             |       Owner:  az_sw_dude
     Type:  Bugs                 |      Status:  new       
Milestone:  To Be Determined     |   Component:  date_time 
  Version:  Boost 1.44.0         |    Severity:  Problem   
 Keywords:                       |  
---------------------------------+------------------------------------------
 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)
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4846>
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