Maybe it can be useful, I found it in logfile:
Assertion failed: BaseClient.cpp:ProcessPublicKeyPacket:2143: Assertion 'Assert failure' failed.
Backtrace follows:
[3] wxOnAssert(char const*, int, char const*, char const*, char const*) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f569e4a]
[4] CUpDownClient::ProcessPublicKeyPacket(unsigned char const*, unsigned int) in BaseClient.cpp:2143
[5] CClientTCPSocket::ProcessExtPacket(unsigned char const*, unsigned int, unsigned char) in ClientTCPSocket.cpp:1325
[6] CClientTCPSocket::PacketReceived(CPacket*) in ClientTCPSocket.cpp:1987
[7] CEMSocket::OnReceive(int) in EMSocket.cpp:275
[8] CClientTCPSocket::OnReceive(int) in ClientTCPSocket.cpp:1897
[9] MuleNotify::LibSocketReceive(CLibSocket*, int) in LibSocketAsio.cpp:1464
[10] MuleNotify::CMuleNotifier2<CLibSocket*, int>::Notify() const in GuiEvents.h:295
[11] MuleNotify::CMuleGUIEvent::Notify() const in GuiEvents.h:368
[12] CamuleApp::OnNotifyEvent(MuleNotify::CMuleGUIEvent&) in amule.cpp:1363
[13] wxAppConsoleBase::CallEventHandler(wxEvtHandler*, wxEventFunctor&, wxEvent&) const in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f56870e]
[14] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6ee967]
[15] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eea5b]
[16] wxEvtHandler::TryHereOnly(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eee18]
[17] wxEvtHandler::ProcessEventLocally(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eeea3]
[18] wxEvtHandler::ProcessEvent(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eef05]
[19] wxEvtHandler::ProcessPendingEvents() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6ef98a]
[20] wxAppConsoleBase::ProcessPendingEvents() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f56a827]
[21] wxEventLoopManual::ProcessEvents() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5aa88c]
[22] wxEventLoopManual::DoRun() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5aa968]
[23] wxEventLoopBase::Run() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5aa6e3]
[24] wxAppConsoleBase::MainLoop() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f56fb76]
[25] CamuleDaemonApp::OnRun() in amuled.cpp:640
[26] wxEntry(int&, wchar_t**) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5fc2b0]
[27] main in amuled.cpp:122
[28] __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6[0x7ff23e8e2b45]
[29] _start in :0
Assertion failed: BaseClient.cpp:ProcessSignaturePacket:2169: Assertion 'Assert failure' failed.
Backtrace follows:
[3] wxOnAssert(char const*, int, char const*, char const*, char const*) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f569e4a]
[4] CUpDownClient::ProcessSignaturePacket(unsigned char const*, unsigned int) in BaseClient.cpp:2169
[5] CClientTCPSocket::ProcessExtPacket(unsigned char const*, unsigned int, unsigned char) in ClientTCPSocket.cpp:1337
[6] CClientTCPSocket::PacketReceived(CPacket*) in ClientTCPSocket.cpp:1987
[7] CEMSocket::OnReceive(int) in EMSocket.cpp:275
[8] CClientTCPSocket::OnReceive(int) in ClientTCPSocket.cpp:1897
[9] MuleNotify::LibSocketReceive(CLibSocket*, int) in LibSocketAsio.cpp:1464
[10] MuleNotify::CMuleNotifier2<CLibSocket*, int>::Notify() const in GuiEvents.h:295
[11] MuleNotify::CMuleGUIEvent::Notify() const in GuiEvents.h:368
[12] CamuleApp::OnNotifyEvent(MuleNotify::CMuleGUIEvent&) in amule.cpp:1363
[13] wxAppConsoleBase::CallEventHandler(wxEvtHandler*, wxEventFunctor&, wxEvent&) const in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f56870e]
[14] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6ee967]
[15] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eea5b]
[16] wxEvtHandler::TryHereOnly(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eee18]
[17] wxEvtHandler::ProcessEventLocally(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eeea3]
[18] wxEvtHandler::ProcessEvent(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6eef05]
[19] wxEvtHandler::ProcessPendingEvents() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f6ef98a]
[20] wxAppConsoleBase::ProcessPendingEvents() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f56a827]
[21] wxEventLoopManual::ProcessEvents() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5aa88c]
[22] wxEventLoopManual::DoRun() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5aa968]
[23] wxEventLoopBase::Run() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5aa6e3]
[24] wxAppConsoleBase::MainLoop() in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f56fb76]
[25] CamuleDaemonApp::OnRun() in amuled.cpp:640
[26] wxEntry(int&, wchar_t**) in /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0[0x7ff23f5fc2b0]
[27] main in amuled.cpp:122
[28] __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6[0x7ff23e8e2b45]
[29] _start in :0
!2015-09-22 22:09:22: BaseClient.cpp(455): Client 4882 still linked in 1 places: CUpDownClient::Safe_Delete reflocker, copy ctor of copy ctor of copy ctor of copy ctor of CClientList::AddClient m_hashList.insert,
2015-09-22 22:09:22: BaseClient.cpp(3003): Last reference to client 4882 0x0000000004bbc600 unlinked, delete it.