BGL leaky?

30 Apr 2003

      Dear Boost users,

is the BGL leaky? For example the code added below produces memory leaks 
(as seen from also added valgrind output).
When I comment out the line marked by /* THIS LINE DOES IT */, there are 
no leaks. I am running BGL 1.29 and gcc 3.2.

Any ideas for a work-around?

cheers
 Martin

#include <iostream>                  // for std::cout
#include <utility>                   // for std::pair
#include <algorithm>                 // for std::for_each
#include <boost/graph/graph_traits.hpp>
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/dijkstra_shortest_paths.hpp>

  using namespace boost;

  int main(int,char*[])
  {
    // create a typedef for the Graph type
    typedef adjacency_list<vecS, vecS, bidirectionalS> Graph;

    // Make convenient labels for the vertices
    enum { A, B, C, D, E, N };
    const int num_vertices = N;

    // writing out the edges in the graph
    typedef std::pair<int, int> Edge;
    Edge edge_array[] =
    { Edge(A,B), Edge(A,D), Edge(C,A), Edge(D,C),
      Edge(C,E), Edge(B,D), Edge(D,E), };
    int num_edges = sizeof(edge_array)/sizeof(edge_array[0]);

    // declare a graph object
    Graph* g = new Graph(num_vertices);

    // add the edges to the graph object
    for (int i = 0; i < num_edges; ++i)
      add_edge(edge_array[i].first, edge_array[i].second, *g);  /* THIS 
LINE DOES IT */

    delete g;

    return 0;
  }

okrslar@liebrich:~/molgen/domclust/src/test> valgrind --leak-check=yes 
--show-reachable=yes ./domclust
==23473== valgrind-1.0.4, a memory error detector for x86 GNU/Linux.
==23473== Copyright (C) 2000-2002, and GNU GPL'd, by Julian Seward.
==23473== Estimated CPU clock rate is 2412 MHz
==23473== For more details, rerun with: -v
==23473==
==23473==
==23473== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==23473== malloc/free: in use at exit: 384 bytes in 1 blocks.
==23473== malloc/free: 3 allocs, 2 frees, 544 bytes allocated.
==23473== For counts of detected errors, rerun with: -v
==23473== searching for pointers to 1 not-freed blocks.
==23473== checked 6470036 bytes.
==23473==
==23473== definitely lost: 0 bytes in 0 blocks.
==23473== possibly lost:   0 bytes in 0 blocks.
==23473== still reachable: 384 bytes in 1 blocks.
==23473==
==23473== 384 bytes in 1 blocks are still reachable in loss record 1 of 1
==23473==    at 0x4004A3A8: __builtin_new (vg_clientfuncs.c:125)
==23473==    by 0x4004A3F6: operator new(unsigned) (vg_clientfuncs.c:138)
==23473==    by 0x4035E4F1: ??? (bits/stl_alloc.h:482)
==23473==    by 0x4035E40D: ??? (bits/stl_alloc.h:532)
==23473==
==23473== LEAK SUMMARY:
==23473==    definitely lost: 0 bytes in 0 blocks.
==23473==    possibly lost:   0 bytes in 0 blocks.
==23473==    still reachable: 384 bytes in 1 blocks.
==23473==

-- 
-----------------------------------------------------------------------------
Martin Okrslar
MPI for Molecular Genetics          phone: ++ 49 + 30 / 8413-1166
Computational Molecular Biology     Fax:   ++ 49 + 30 / 8413-1152
Ihnestrasse 73                      email: okrslar@molgen.mpg.de
D-14195 Berlin                      URL:   http://cmb.molgen.mpg.de
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