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C ++ Map Giving Bus Error while trying to set value

I have the following function as a constructor for a class:

template<typename T>
void Pointer<T>::Pointer(T* inPtr)
{
  mPtr = inPtr;
  if (sRefCountMap.find(mPtr) == sRefCountMap.end()) {  
    sRefCountMap[mPtr] = 1;
  } else {
    sRefCountMap[mPtr]++;
  }
}

Here is the definition to display:

static std::map<T*, int> sRefCountMap;

Sometimes I get a bus error when running this code:

#0  0x95110fc0 in std::_Rb_tree_decrement ()
#1  0x00017ccc in std::_Rb_tree_iterator<std::pair<Language::Value* const, int> >::operator-- (this=0xbfffe014) at stl_tree.h:196
#2  0x0001b16c in std::_Rb_tree<Language::Value*, std::pair<Language::Value* const, int>, std::_Select1st<std::pair<Language::Value* const, int> >, std::less<Language::Value*>, std::allocator<std::pair<Language::Value* const, int> > >::insert_unique (this=0x2a404, __v=@0xbfffe14c) at stl_tree.h:885
#3  0x0001b39c in std::_Rb_tree<Language::Value*, std::pair<Language::Value* const, int>, std::_Select1st<std::pair<Language::Value* const, int> >, std::less<Language::Value*>, std::allocator<std::pair<Language::Value* const, int> > >::insert_unique (this=0x2a404, __position={_M_node = 0x2a408}, __v=@0xbfffe14c) at stl_tree.h:905
#4  0x0001b5a0 in __gnu_norm::map<Language::Value*, int, std::less<Language::Value*>, std::allocator<std::pair<Language::Value* const, int> > >::insert (this=0x2a404, position={_M_node = 0x2a408}, __x=@0xbfffe14c) at stl_map.h:384
#5  0x0001b6e0 in __gnu_norm::map<Language::Value*, int, std::less<Language::Value*>, std::allocator<std::pair<Language::Value* const, int> > >::operator[] (this=0x2a404, __k=@0x2e110) at stl_map.h:339

Thank.

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2 answers

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typedef std::map<T*, int> RefCountMap;

static RefCountMap& GetRefCountMap()
{
    static RefCountMap map;
    return map;
}

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