ZNC crashes when user which is fixed to partyline channel is deleted. about znc HOT 1 CLOSED

virtual EModRet OnDeleteUser(CUser& User) {
    // Loop through each chan
    for (set<CPartylineChannel*>::iterator it = m_ssChannels.begin(); it != m_ssChannels.end(); ++it) {
        RemoveUser(&User, *it, "KICK", "User deleted", true);
    }

    return CONTINUE;
}


void RemoveUser(CUser* pUser, CPartylineChannel* pChannel, const CString& sCommand,
        const CString& sMessage = "", bool bNickAsTarget = false) {

            ...

    if (ssNicks.empty()) {
        delete pChannel;
        m_ssChannels.erase(pChannel);
    }
}

(gdb) bt full
#0  0x00007ffff6b45965 in raise () from /lib/libc.so.6
No symbol table info available.
#1  0x00007ffff6b46ddb in abort () from /lib/libc.so.6
No symbol table info available.
#2  0x00007ffff7118ddd in __gnu_debug::_Error_formatter::_M_error() const ()
   from /usr/lib/libstdc++.so.6
No symbol table info available.
#3  0x00007ffff52ff92c in __gnu_debug::_Safe_iterator<std::_Rb_tree_const_iterator<CPartylineChannel*>, std::__debug::set<CPartylineChannel*, std::
less<CPartylineChannel*>, std::allocator<CPartylineChannel*> > >::operator++ (
    this=0x7fffffffe210)
    at /usr/lib/gcc/x86_64-unknown-linux-gnu/4.6.2/../../../../include/c++/4.6.2/debug/safe_iterator.h:220
No locals.
#4  0x00007ffff52f49bf in CPartylineMod::OnDeleteUser (this=0x953bf0, User=...)
    at partyline.cpp:126
        it = {<__gnu_debug::_Safe_iterator_base> = {_M_sequence = 0x953de8, 
            _M_version = 0, _M_prior = 0x0, _M_next = 0x0}, _M_current = {
            _M_node = 0x952890}}
#5  0x000000000061b068 in CModules::OnDeleteUser (this=0x946c90, User=...)
    at src/Modules.cpp:747
        pMod = 0x953bf0
---Type <return> to continue, or q <return> to quit---
        e = CModule::CONTINUE
        pOldClient = 0x0
        pOldUser = 0x0
        pNetwork = 0x0
        a = 2
        bHaltCore = false
#6  0x000000000057e893 in CZNC::HandleUserDeletion (this=0x92e040)
    at src/znc.cpp:118
        pUser = 0x94eae0
        it = {<__gnu_debug::_Safe_iterator_base> = {_M_sequence = 0x92e100, 
            _M_version = 1, _M_prior = 0x0, _M_next = 0x7fffffffe360}, 
          _M_current = {_M_node = 0x94bef0}}
        end = {<__gnu_debug::_Safe_iterator_base> = {_M_sequence = 0x92e100, 
            _M_version = 1, _M_prior = 0x7fffffffe330, _M_next = 0x0}, 
          _M_current = {_M_node = 0x92e0d8}}
#7  0x000000000057ebcf in CZNC::Loop (this=0x92e040) at src/znc.cpp:161
        sError = {<std::basic_string<char, std::char_traits<char>, std::allocator<char> >> = {static npos = <optimized out>, 
            _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
              _M_p = 0x92cf38 ""}}, <No data fields>}
#8  0x000000000054a8f7 in main (argc=2, argv=0x7fffffffe958)
---Type <return> to continue, or q <return> to quit---
    at src/main.cpp:320
        sConfig = {<std::basic_string<char, std::char_traits<char>, std::allocator<char> >> = {static npos = <optimized out>, 
            _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
              _M_p = 0x92cf38 ""}}, <No data fields>}
        iOptIndex = -1
        bForeground = true
        bMakePass = false
        bAllowRoot = false
        pZNC = 0x92e040
        sa = {__sigaction_handler = {sa_handler = 0x549a50 <die(int)>, 
            sa_sigaction = 0x549a50 <die(int)>}, sa_mask = {__val = {
              0 <repeats 16 times>}}, sa_flags = -2147483648, 
          sa_restorer = 0x1}
        iRet = 0
        sDataDir = {<std::basic_string<char, std::char_traits<char>, std::allocator<char> >> = {static npos = <optimized out>, 
            _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
              _M_p = 0x92cf38 ""}}, <No data fields>}
        iArg = -1
---Type <return> to continue, or q <return> to quit---
        bMakeConf = false
        bMakePem = false
(gdb)