Amule occasionally crashes (maybe once a month?), almost always during a rescan. There were uploads and downloads active at the time.
Here's amule's self-printed backtrace. I didn't get a proper backtrace with gdb, unfortunately. I'm on Ubuntu 15.04, x86-64, running the aMule GUI.
Current version is: aMule SVN compiled with wxGTK2 v2.8.12 (Snapshot: rev. 10835)
Running on: Linux 3.19.0-31-generic x86_64
[2] wxFatalSignalHandler in /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0[0x7f4a00ba2872]
[3] ?? in /lib/x86_64-linux-gnu/libpthread.so.0[0x7f49ffe55d10]
[4] std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::find(unsigned int const&) in amule[0x60d9cd]
[5] std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::find(unsigned int const&) in amule[0x60da91]
[6] std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::find(unsigned int const&) in amule[0x61a16f]
[7] std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::find(unsigned int const&) in amule[0x61a6e0]
[8] wxCommandEvent::~wxCommandEvent() in amule[0x544800]
[9] wxTimer::IsRunning() const in amule[0x57f73b]
[10] void std::_Destroy_aux<false>::__destroy<std::string*>(std::string*, std::string*) in amule[0x4e02bd]
[11] wxCommandEvent::~wxCommandEvent() in amule[0x544797]
[12] wxEvtHandler::ProcessEventIfMatches(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0[0x7f4a00b9f7dc]
[13] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) in /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0[0x7f4a00b9f893]
[14] wxEvtHandler::ProcessEvent(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0[0x7f4a00b9fc2b]
[15] wxWindowBase::TryParent(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0[0x7f4a0131d989]
[16] wxWindowBase::TryParent(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0[0x7f4a0131d989]
[17] wxWindowBase::TryParent(wxEvent&) in /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0[0x7f4a0131d989]
[18] ?? in /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0[0x7f4a01263b9c]
[19] ?? in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb0f504]
[20] g_signal_emit_valist in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb28fa7]
[21] g_signal_emit in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb298ff]
[22] ?? in /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0[0x7f49ff2b6395]
[23] g_closure_invoke in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb0f2d5]
[24] ?? in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb20913]
[25] g_signal_emit_valist in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb29698]
[26] g_signal_emit in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb298ff]
[27] ?? in /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0[0x7f49ff2b5289]
[28] ?? in /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0[0x7f49ff35bd1f]
[29] g_closure_invoke in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb0f2d5]
[30] ?? in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb20f32]
[31] g_signal_emit_valist in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb291a5]
[32] g_signal_emit in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0[0x7f49feb298ff]
[33] ?? in /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0[0x7f49ff47361c]
[34] gtk_propagate_event in /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0[0x7f49ff35a464]
[35] gtk_main_do_event in /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0[0x7f49ff35a8fb]
