[Dev-C++] STL Map question

[Shane B. <ast...@te...>]

Hello,

    I recently ran into an issue that I can't seem to pinpoint the cause =
of.  99% of the time, it seems to work, so it seems to be a small =
situational bug.  Subject, is a UserList class, which internally =
implements an STL map.  I am not sure why, but it seems to crash =
occasionally when I attempt to call the map::find function, with a valid =
null terminated char array.  The map template implements a simple case =
insensative comparison.  As I said, it works more often than not, but =
for some reason when attempting to delete from the list sometimes, it =
causes a SEGFAULT.  Here is what GDB has to say:

Program received signal SIGSEGV, Segmentation fault.
0x80bb142 in _Rb_tree<char const *, pair<char const *const, User *>, =
_Select1st<pair<char const *const, User *> >, UserList::ltstr, =
allocator<User *> >::find (
    this=3D0xbf14b30, __k=3D@0xbfbff7bc) at =
/usr/include/g++/stl_tree.h:1118
1118      _Link_type __x =3D _M_root();      // Current node.=20
(gdb) up
#1  0x80bb529 in map<char const *, User *, UserList::ltstr, =
allocator<User *> >::find (this=3D0xbf14b30, __x=3D@0xbfbff7bc) at =
/usr/include/g++/stl_map.h:187
187       iterator find(const key_type& __x) { return _M_t.find(__x); }
(gdb) up
#2  0x80ba8e9 in UserList::DeleteUser (this=3D0xbf14b30,=20
    pNick=3D0xbf12300 "_=C7=E1=DF=D1=D2_") at UserList.cpp:26
26              UserMap::iterator it =3D m_mapUsers.find(pNick);
(gdb) print pNick
$1 =3D 0xbf12300 "_=C7=E1=DF=D1=D2_"


And here is the code in question.

bool UserList::DeleteUser(const char *pNick)
{
    bool bRet =3D false;
=20
    if(m_mapUsers.size() > 0)
    {
        UserMap::iterator it =3D m_mapUsers.find(pNick);
        if(it !=3D m_mapUsers.end())
        {
            m_mapUsers.erase(it);
            bRet =3D true;
        }
    }

    return bRet;
}


My first thought was that the MAP container had issues when attempting =
to "find" with 0 elements, but that didn't seem to affect anything.  Any =
thoughts?

    -Shane