ASSERT INFO:
./src/common/strconv.cpp(1208): assert "Assert failure" failed in FromWChar(): trying to encode undefined Unicode character

BACKTRACE:
[1] wxMBConvStrictUTF8::FromWChar(char*, unsigned long, wchar_t const*, unsigned long) const
[2] wxString::AsChar(wxMBConv const&) const
[3] wxTextCtrl::WriteText(wxString const&)
[4] fz::recursive_remove::confirm() const
[5] fz::recursive_remove::confirm() const
[6] std::__cxx11::_List_base<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_clear()
[7] wxEvtHandler::TryHereOnly(wxEvent&)
[8] wxEvtHandler::ProcessEventLocally(wxEvent&)
[9] wxEvtHandler::ProcessEvent(wxEvent&)
[10] wxEvtHandler::ProcessPendingEvents()
[11] wxAppConsoleBase::ProcessPendingEvents()
[12] wxApp::DoIdle()
[13] g_main_context_dispatch
[14] g_main_loop_run
[15] gtk_main
[16] wxGUIEventLoop::DoRun()
[17] wxEventLoopBase::Run()
[18] wxAppConsoleBase::MainLoop()
[19] wxEntry(int&, wchar_t**)
[20] __libc_start_main