I am using a STL list of boost shared pointer in my code and and it randomly dumps core. Below is the code snippet and the core stack.

class A () 

{ 

    virtual ~A(); 

    string getsomestring(); 

} 

class B: public A 

{ 

} 

typedef shared_ptr<A> A_ptr; 

class C // singelton class 

{ 

public: 

getList(list <A_ptr>& temp_list) 

{ 

    list<A_ptr>::iterator itr = _inv.begin();                 

    for( ; itr != _inv.end(); itr++ ) { 

        temp_list.push_back( (*itr) ); 

} 

getListContent ( list<string>& str_list) 

{ 

    list<A_ptr>::iterator itr = _inv.begin();

    for( ; itr != _inv.end(); itr++ ) {

        str_list.push_back( (*itr)->getsomestring() ); 

    } 

} 

private: 

list <A_ptr> _inv; 

} 

main() 

{ 

C *c= new C; // create an instance ( its a singleton class) 

// On creating an instance of C, the private member variable inventory is populated. 

// inventory.push_back(A_ptr(new FRU ( fvar ))) 

thread 1 { 

list<A_ptr> var1; 

c->getList(var1); 

list <string> var2; 

c->getListContent(var2); 

}  // End of thread 

delete c; 

}  // end of main

Now this code works fine for some iterations and then dumps core with the following stack

###################### 

Thread 1 (Thread 0x55567f7af0 (LWP 23773)): 

#0  0x0000000120038ecc in boost::detail::atomic_decrement (pw=0xa) 

   sysroot/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp:66

#1  0x0000000120038f44 in boost::detail::sp_counted_base::release (this=0x2)

#2  0x00000001200390ac in boost::detail::shared_count::~shared_count (this=0x1200b08d8, __in_chrg=<value optimized out>)

#3  0x000000012003eaf4 in boost::shared_ptr<A>::~shared_ptr (this=0x1200b08d0, __in_chrg=<value optimized out>) 

#4  0x000000012003eb4c in __gnu_cxx::new_allocator<boost::shared_ptr<A> >::destroy (this=0xffffeaf640, __p=0x1200b08d0) 

#5  0x000000012003c9e0 in std::_List_base<boost::shared_ptr<A>, std::allocator<boost::shared_ptr<A> > >::_M_clear (this=0x1200a8ee8)     

#6  0x000000012003b4ac in std::_List_base<boost::shared_ptr<A>, std::allocator<boost::shared_ptr<A> > >::~_List_base (this=0x1200a8ee8, __in_chrg=<value optimized out>) 

#7  0x000000012003a0e8 in std::list<boost::shared_ptr<A>, std::allocator<boost::shared_ptr<A> > >::~list (this=0x1200a8ee8, __in_chrg=<value optimized out>) 

#8  0x0000000120068b64 in C::~C (this=0x1200a8e70, __in_chrg=<value optimized out>)  

###################################################### 

This code is cross compiled for MIPS64 arch on linux x86_64 machine and is running on a 64 bit MIPS machine. I am not sure why it is dumping core. It dumps core giving a SIGBUS error. Do i have to specifically handle the delete operation of the List ? I am using the default destructor for "C" class and there is no pointers in the class A and Class A also doesnt have anything in its destructor, no memory allocations are done in Class A. Any suggestions regarding this problem would be highly helpful.