I am getting following error in boost multi-index library. I am using following code to add and remove procedures by id

in multi index container. Can somebody please let me know what might be wrong here? Really appreciate your quick

#include <boost/multi_index_container.hpp>
#include <boost/multi_index/member.hpp>
#include <boost/multi_index/ordered_index.hpp>
#include <boost/multi_index/hashed_index.hpp>
#include <boost/config.hpp>
#include <boost/utility.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/multi_index/key_extractors.hpp>
#include "Procedure.h"
using boost::multi_index_container;
using namespace boost::multi_index;

/**
* Defines tag used for procedure id.
*/
struct procedure_id_tag {
};

class Procedure_Pool: boost::noncopyable {

private:
/**
* Type definition for multi index container.
*/
typedef multi_index_container<
Procedure*,
indexed_by<
hashed_unique<
tag<procedure_id_tag>, const_mem_fun<Procedure, int, &Procedure::id> >
>
> Procedure_Hashed_Pool;

/**
* Type definition for indexing based on procedure id tag.
*/
typedef Procedure_Hashed_Pool::index<procedure_id_tag>::type Procedure_By_Id;

public:
/**
* Constructor.
*/
Procedure_Pool(): pool_(), procedure_by_id_(pool_.get<procedure_id_tag>()) {
}
/**
* Adds specified procedure in this pool.
* It will intenally used procedures id() method to index procedure.
* @param _procedure Procedure to be added in this pool
* @return Success (0) or Failure (-1) based on addition happened or not
*/
int add_by_id(Procedure * _procedure);
/**
* Removes procedure from this pool.
* @param _procedure procedure that needs to be removed
* @return Success (0) or Failure (1) based on removal happend or not
*/
int remove_by_id(Procedure * _procedure);
/**
* Retrieves procedure based on specified id.
* @param _id Identifier
* @return Procedure Pointer to procedure. Returns 0 if procedure not found
*/
Procedure * find_by_id(int _id);

private:
/**
* Returns true if procedure is present otherwise returns false.
* @param _procedure procedure that needs to found
* @return true if found or false if not found
*/
bool find_by_id(Procedure * _procedure);
/**
* boost multiindex object that is associated with this pool.
*/
Procedure_Hashed_Pool pool_;
/**
* Refernece of pool that is indexed by procedure id tag.
*/
Procedure_By_Id &procedure_by_id_;
};

#include "../include/Procedure_Pool.h"

int Procedure_Pool::add_by_id(Procedure * _procedure)
{
LD_TRACE("Procedure_Pool::add_by_id");
ACE_ASSERT(_procedure != 0);
if (!find_by_id(_procedure)) {
  // procedure not found
  procedure_by_id_.insert(_procedure);
  // debug info
  ACE_DEBUG((LM_DEBUG, "Added procedure : %d \n", _procedure->id()));
  // return success
  return 0;
} else {
  // error
  ACE_ERROR((LD_ERROR "%N:%l Error in adding procedure : %d \n", _procedure->id()));
  // return failure
  return -1;
}
}

int Procedure_Pool::remove_by_id(Procedure * _procedure)
{
LD_TRACE("Procedure_Pool::remove_by_id");
ACE_ASSERT(_procedure != 0);
if (find_by_id(_procedure)) {
  // procedure found
  procedure_by_id_.erase(_procedure->id());
  ACE_DEBUG((LM_DEBUG, "Removed procedure : %d \n", _procedure->id()));
  return 0;
} else {
  ACE_ERROR((LD_ERROR "%N:%l Error in removing procedure : %d \n", _procedure->id()));
  return -1;
}
}

Procedure * Procedure_Pool::find_by_id(int _id)
{
LD_TRACE("Procedure_Pool::find_by_id");
Procedure_By_Id::iterator it = procedure_by_id_.find(_id);
if (it != procedure_by_id_.end()) {
ACE_DEBUG((LM_DEBUG, "%N:%l Found procedure for id: %d \n", _id));
return *it;
}
ACE_ERROR((LD_ERROR "%N:%l Not able to found procedure for id: %d \n", _id));
// return null
return 0;
}

bool Procedure_Pool::find_by_id(Procedure * _procedure)
{
LD_TRACE("Procedure_Pool::find_by_id");
ACE_ASSERT(_procedure != 0);
Procedure_By_Id::iterator it = procedure_by_id_.find(_procedure->id());
return (it != procedure_by_id_.end());
}

(gdb) where
#0 0x00000000 in ?? ()
#1 0x000d0008 in _ZNK5boost11multi_index13const_mem_funI9ProcedureiXadsrS2_NKS2_2idEvEEclERKS2_ ()
#2 0x000cffa4 in _ZNK5boost11multi_index13const_mem_funI9ProcedureiXadsrS2_NKS2_2idEvEEclIPS2_EEiRKT_ ()
#3 0x000cf4dc in _ZN5boost11multi_index6detail12hashed_indexINS0_13const_mem_funI9ProcedureiXadsrS4_NKS4_2idEvEEENS_4hashIiEESt8equal_toIiENS1_9nth_layerILi1EPS4_NS0_10indexed_byINS0_13hashed_uniqueINS0_3tagI16procedure_id_tagN4mpl_2naESH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_EES5_SH_SH_EESH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_SH_EESaISB_EEENS_3mpl6v_itemISF_NSN_7vector0ISH_EELi0EEENS1_17hashed_unique_tagEE5eraseEi ()
#4 0x00066774 in Procedure_Pool::remove_by_id ()
#5 0x0007a4ac in AP_TCP_Connection::unsubscribe ()
#6 0x0006bd5c in Access_Point::unsubscribe ()
#7 0x00082988 in Sample_Procedure::handle ()
#8 0x0007a89c in AP_TCP_Connection::handle ()
#9 0x0005f380 in Tcp_Handler::handle_output ()
#10 0xff257ca8 in ACE_Select_Reactor_Notify::dispatch_notify ()
at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#11 0xff26f424 in ACE_TP_Reactor::handle_notify_events () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#12 0xff26f188 in ACE_TP_Reactor::dispatch_i () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#13 0xff26eff8 in ACE_TP_Reactor::handle_events () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#14 0xff254e0c in ACE_Reactor::run_reactor_event_loop () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#15 0x000f3848 in ACE_Reactor::run_event_loop ()
#16 0x000f37d8 in Global_Reactor::svc ()
#17 0xff2668dc in ACE_Task_Base::svc_run () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#18 0xff266cb0 in ACE_Thread_Adapter::invoke_i () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#19 0xff266c1c in ACE_Thread_Adapter::invoke () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#20 0xff216d50 in ace_thread_adapter () at /mot/proj/ivtools/ppatel1/ACE_wrappers/ace/String_Base.inl:32
#21 0xfe8db730 in _thread_start () from /usr/lib/libthread.so.1
#22 0xfe8db730 in _thread_start () from /usr/lib/libthread.so.1