Thank you for the work, David. I have a question; how do you debug when Guile crashes to terminal printing “Segmentation fault”`?
The long story so far: I want to develop a GTK app with G-Golf. I try to run it with GNU Guix [1] (not Debian like you do, as far as I remember), because now the Guix’ hard-working gnome team have added the needed version of gobject-introspection to Guix. I have cloned the g-golf repository: $ cd ~/src $ git clone 'https://git.savannah.gnu.org/git/g-golf.git' To create the app’s basic structure, I run Guile Hall [2]: $ guix shell guile-hall $ hall init --author "Florian Pelz" myapp --execute This gives me a guix.scm file, where I add g-golf and gtk to the inputs: (use-modules (gnu packages gtk) (gnu packages guile) (gnu packages guile-xyz) (guix transformations)) (package (name "myapp") […] (inputs (list guile-3.0 gtk ((options->transformation '((with-commit . "guile-g-golf=v0.8.0-rc-3"))) guile-g-golf))) […]) Now I run: $ guix shell $ ~/src/g-golf/examples/gtk-4/hello-world.scm It tells me dbus-launch must be running, so I add a d-bus service to my Guix Home configuration. (use-modules (gnu home services desktop)) (home-environment (packages […]) (services (list (service home-dbus-service-type) […]))) I run again the commands $ guix shell $ ~/src/g-golf/examples/gtk-4/hello-world.scm successfully; a window is shown, though not responsive, with plenty of errors. (hello-world.scm:12627): Gtk-WARNING **: 23:59:50.617: Unable to acquire the address of the accessibility bus: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files. If you are attempting to run GTK without a11y support, GTK_A11Y should be set to 'none'. (hello-world.scm:12627): GLib-GObject-CRITICAL **: 23:59:51.067: cannot register existing type 'GdkPixbuf' (hello-world.scm:12627): GLib-GObject-CRITICAL **: 23:59:51.067: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed (hello-world.scm:12627): GLib-GObject-CRITICAL **: 23:59:51.067: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed (hello-world.scm:12627): GLib-CRITICAL **: 23:59:51.068: g_once_init_leave: assertion 'result != 0' failed However, when I now run: $ ~/src/g-golf/examples/gtk-4/drawing-widget.scm it crashes, displaying only “Segmentation fault”. Same with $ ~/src/g-golf/examples/gtk-4/peg-solitaire.scm I run and read $ info "(guile)Catching Exceptions" but the techniques from there that I tried do not catch the segmentation fault. How did you go about debugging such errors? Because I suppose you must have been having such debugging sessions too. Regards, Florian [1] GNU Guix: https://guix.gnu.org/ [2] Guix’ guile-hall package from https://gitlab.com/a-sassmannshausen/guile-hall
