Re: Please help (core dump)

Hi Carlo,

On 25/7/20 15:35, Carlo Wood wrote:
> Hi Aitor,
>
> is this gtkmm3? For example, Gtk::VBox is deprecated,
> I'm using Gtk::Grid.


Yes, it is. Have a look at the "pkg_check_modules" in the configuration 
of CMake. I'm using the deprecated VBox because this
code is taken froma network manager project, which i'd like to be 
compatible with goth gtkmm-2.24 and gtkmm-3.24.


> Currently my application just core dumps:(.
> The backtrace is:
>
> Thread 1 "tstcpp" received signal SIGSEGV, Segmentation fault.
> 0x00007ffff6bc29c6 in g_action_map_add_action () from /usr/lib/libgio-2.0.so.0
> (gdb) bt
> #0  0x00007ffff6bc29c6 in g_action_map_add_action () at /usr/lib/libgio-2.0.so.0
> #1  0x00007ffff78cc541 in Gio::ActionMap::add_action(Glib::ustring const&) () at /usr/lib/libgiomm-2.4.so.1
> #2  0x00007ffff78cc65e in Gio::ActionMap::add_action(Glib::ustring const&, sigc::slot<void, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil> const&) ()
>      at /usr/lib/libgiomm-2.4.so.1
> #3  0x0000555555573871 in LinuxChessboardWidget::LinuxChessboardWidget(Gtk::Window*, Glib::RefPtr<cwchess::Promotion>) (this=
>      0x5555563bd928, drawable=0x5555563bd8a0, promotion=..., __in_chrg=<optimized out>, __vtt_parm=<optimized out>)
>      at /home/carlo/projects/cwchessboard/cwchessboard/LinuxChessboardWidget.cxx:164
> #4  0x000055555557b68b in LinuxChessWindow::LinuxChessWindow() (this=0x5555563bd8a0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>)
>      at /home/carlo/projects/cwchessboard/cwchessboard/LinuxChessWindow.cxx:4
> #5  0x000055555556e473 in LinuxChessApplication::create_window() (this=0x5555555f6230) at /home/carlo/projects/cwchessboard/cwchessboard/LinuxChessApplication.cxx:160
> #6  0x000055555556e3ed in LinuxChessApplication::on_activate() (this=0x5555555f6230) at /home/carlo/projects/cwchessboard/cwchessboard/LinuxChessApplication.cxx:155
> #7  0x00007ffff78bbc2c in Gio::Application_Class::activate_callback(_GApplication*) () at /usr/lib/libgiomm-2.4.so.1
> #8  0x00007ffff694480a in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
> #9  0x00007ffff6944980 in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
> #10 0x00007ffff6bbea89 in  () at /usr/lib/libgio-2.0.so.0
> #11 0x00007ffff78bba8a in Gio::Application::local_command_line_vfunc(char**&, int&) () at /usr/lib/libgiomm-2.4.so.1
> #12 0x00007ffff78bbe51 in Gio::Application_Class::local_command_line_vfunc_callback(_GApplication*, char***, int*) () at /usr/lib/libgiomm-2.4.so.1
> #13 0x00007ffff6bbec0a in g_application_run () at /usr/lib/libgio-2.0.so.0
> #14 0x000055555557a928 in main(int, char**) (argc=1, argv=0x7fffffffd448) at /home/carlo/projects/cwchessboard/cwchessboard/LinuxChess.cxx:14
>
> Frame #3 (the first that is my code) is:
>
> #3  0x0000555555573871 in LinuxChessboardWidget::LinuxChessboardWidget(this=0x5555563bd928, drawable=0x5555563bd8a0, promotion=...,__in_chrg=<optimized out>, __vtt_parm=<optimized out>)
>      at /home/carlo/projects/cwchessboard/cwchessboard/LinuxChessboardWidget.cxx:164
> 164       add_action("ModeShowCandidates", sigc::mem_fun(*this, &LinuxChessboardWidget::on_menu_mode_showcandidates));
>
>
> Why would this core dump??
>
> LinuxChessboardWidget is defined as:
>
> class LinuxChessboardWidget : public cwmm::ChessPositionWidget, public Gio::ActionMap
> {
>    ...
>
> I have to derive from Gio::ActionMap because its constructor is protected.
> The call to `add_action` above is to that class.
>
> Can someone tell me what I'm doing wrong?
>

Mmm..., i don't know, but this issue might be related with some missing 
arguments in your defined signal/slot.

BTW, i uploaded my third examples including an icon factory for the 
customized icons of the second part of the menu bar:

https://www.gnuinos.org/Gtkmm Examples/Example_3/screenshot.png 
<https://www.gnuinos.org/Gtkmm Examples/Example_3/screenshot.png>

Cheers,

Aitor.

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