ASSERT INFO:
/usr/src/debug/wxWidgets-3.2.1/src/common/sizer.cpp(2267): assert "CheckSizerFlags(!((flags) & (wxALIGN_RIGHT)))" failed in DoInsert(): wxALIGN_RIGHT will be ignored in this sizer: only vertical alignment flags can be used in horizontal sizers

DO NOT PANIC !!

If you're an end user running a program not developed by you, please ignore this message, it is harmless, and please try reporting the problem to the program developers.

You may also set WXSUPPRESS_SIZER_FLAGS_CHECK environment variable to suppress all such checks when running this program.

If you're the developer, simply remove this flag from your code to avoid getting this message. You can also call wxSizerFlags::DisableConsistencyChecks() to globally disable all such checks, but this is strongly not recommended.

BACKTRACE:
[1] wxBoxSizer::DoInsert(unsigned long, wxSizerItem*)
[2] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)
[3] wxEvtHandler::SearchDynamicEventTable(wxEvent&)
[4] wxEvtHandler::TryHereOnly(wxEvent&)
[5] wxEvtHandler::ProcessEventLocally(wxEvent&)
[6] wxEvtHandler::ProcessEvent(wxEvent&)
[7] wxWindowBase::TryAfter(wxEvent&)
[8] wxEvtHandler::SafelyProcessEvent(wxEvent&)
[9] wxMenuBase::DoProcessEvent(wxMenuBase*, wxEvent&, wxWindow*)
[10] wxMenuBase::SendEvent(int, int)
[11] g_closure_invoke
[12] g_signal_emit_valist
[13] g_signal_emit
[14] gtk_widget_activate
[15] gtk_menu_shell_activate_item
[16] g_signal_emit_valist
[17] g_signal_emit
[18] gtk_main_do_event
[19] g_main_context_dispatch
[20] g_main_loop_run
[21] gtk_main
[22] wxGUIEventLoop::DoRun()
[23] wxEventLoopBase::Run()
[24] wxAppConsoleBase::MainLoop()
[25] wxEntry(int&, wchar_t**)
[26] __libc_start_main