[Boost-bugs] [Boost C++ Libraries] #10696: boost::container::flat_map copy constructor appears to leak

Subject: [Boost-bugs] [Boost C++ Libraries] #10696: boost::container::flat_map copy constructor appears to leak
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-10-24 16:57:26

#10696: boost::container::flat_map copy constructor appears to leak
---------------------+------------------------------
 Reporter:  dave@…   |       Type:  Bugs
   Status:  new      |  Milestone:  To Be Determined
Component:  None     |    Version:  Boost 1.54.0
 Severity:  Problem  |   Keywords:
---------------------+------------------------------
 The following sandbox.cpp program:
 {{{
 #include <boost/container/flat_map.hpp>

 int main(int argc, char** argv)
 {
     boost::container::flat_map<int, int> myMap;
     boost::container::flat_map<int, int> myCopiedMap(myMap);

     return 0;
 }
 }}}

 causes valgrind 3.9.0 to produce the following:

 {{{
 $ valgrind --tool=memcheck --leak-check=full --show-reachable=no --undef-
 value-errors=no --track-origins=no --child-silent-after-fork=yes --trace-
 children=no ./sandbox
 ==12648== Memcheck, a memory error detector
 ==12648== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
 ==12648== Using Valgrind-3.9.0 and LibVEX; rerun with -h for copyright
 info
 ==12648== Command: ./sandbox
 ==12648==
 ==12648==
 ==12648== HEAP SUMMARY:
 ==12648==     in use at exit: 3,287 bytes in 86 blocks
 ==12648==   total heap usage: 122 allocs, 36 frees, 56,978 bytes allocated
 ==12648==
 ==12648== 0 bytes in 1 blocks are definitely lost in loss record 1 of 86
 ==12648==    at 0x4C27965: operator new(unsigned long) (in
 /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
 ==12648==    by 0x40410F:
 __gnu_cxx::new_allocator<boost::container::container_detail::pair<int,
 int> >::allocate(unsigned long, void const*) (new_allocator.h:104)
 ==12648==    by 0x40400B:
 boost::container::container_detail::allocator_version_traits<std::allocator<boost::container::container_detail::pair<int,
 int> >,
 1u>::allocation_command(std::allocator<boost::container::container_detail::pair<int,
 int> >&, int, unsigned long, unsigned long, unsigned long&,
 boost::container::container_detail::pair<int, int>* const&)
 (allocator_version_traits.hpp:144)
 ==12648==    by 0x403F0D:
 boost::container::container_detail::vector_alloc_holder<std::allocator<boost::container::container_detail::pair<int,
 int> >, boost::container::container_detail::integral_constant<unsigned
 int, 1u> >::allocation_command(int, unsigned long, unsigned long, unsigned
 long&, boost::container::container_detail::pair<int, int>* const&)
 (vector.hpp:395)
 ==12648==    by 0x403D72:
 boost::container::container_detail::vector_alloc_holder<std::allocator<boost::container::container_detail::pair<int,
 int> >, boost::container::container_detail::integral_constant<unsigned
 int, 1u>
 >::vector_alloc_holder<std::allocator<boost::container::container_detail::pair<int,
 int> >
 const&>(std::allocator<boost::container::container_detail::pair<int, int>
 > const&, unsigned long) (vector.hpp:350)
 ==12648==    by 0x403BF2:
 boost::container::vector<boost::container::container_detail::pair<int,
 int>, std::allocator<boost::container::container_detail::pair<int, int> >
 >::vector(boost::container::vector<boost::container::container_detail::pair<int,
 int>, std::allocator<boost::container::container_detail::pair<int, int> >
 > const&) (vector.hpp:732)
 ==12648==    by 0x403B34:
 boost::container::container_detail::flat_tree<int,
 boost::container::container_detail::pair<int, int>,
 boost::container::container_detail::select1st<boost::container::container_detail::pair<int,
 int> >, std::less<int>,
 std::allocator<boost::container::container_detail::pair<int, int> >
 >::Data::Data(boost::container::container_detail::flat_tree<int,
 boost::container::container_detail::pair<int, int>,
 boost::container::container_detail::select1st<boost::container::container_detail::pair<int,
 int> >, std::less<int>,
 std::allocator<boost::container::container_detail::pair<int, int> >
 >::Data const&) (flat_tree.hpp:119)
 ==12648==    by 0x403A42:
 boost::container::container_detail::flat_tree<int,
 boost::container::container_detail::pair<int, int>,
 boost::container::container_detail::select1st<boost::container::container_detail::pair<int,
 int> >, std::less<int>,
 std::allocator<boost::container::container_detail::pair<int, int> >
 >::flat_tree(boost::container::container_detail::flat_tree<int,
 boost::container::container_detail::pair<int, int>,
 boost::container::container_detail::select1st<boost::container::container_detail::pair<int,
 int> >, std::less<int>,
 std::allocator<boost::container::container_detail::pair<int, int> > >
 const&) (flat_tree.hpp:207)
 ==12648==    by 0x40399A: boost::container::flat_map<int, int,
 std::less<int>, std::allocator<std::pair<int, int> >
 >::flat_map(boost::container::flat_map<int, int, std::less<int>,
 std::allocator<std::pair<int, int> > > const&) (flat_map.hpp:209)
 ==12648==    by 0x4037BE: main (sandbox.cpp:6)
 ==12648==
 ==12648== LEAK SUMMARY:
 ==12648==    definitely lost: 0 bytes in 1 blocks
 ==12648==    indirectly lost: 0 bytes in 0 blocks
 ==12648==      possibly lost: 0 bytes in 0 blocks
 ==12648==    still reachable: 3,287 bytes in 85 blocks
 ==12648==         suppressed: 0 bytes in 0 blocks
 ==12648== Reachable blocks (those to which a pointer was found) are not
 shown.
 ==12648== To see them, rerun with: --leak-check=full --show-leak-kinds=all
 ==12648==
 ==12648== For counts of detected and suppressed errors, rerun with: -v
 ==12648== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10696>
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