233997 2021-12-08 02:25:19 -0800 Connecting to context menu signal leads to segfault 2021-12-15 06:47:34 -0800 1 1 1 Unclassified WebKit WebKitGTK Other PC Linux RESOLVED DUPLICATE 233785 P2 Normal --- 1 EvilTwin1 webkit-unassigned bugs-noreply EvilTwin1 mcatanzaro webkit-bug-importer oldest_to_newest 1821492 0 EvilTwin1 2021-12-08 02:25:19 -0800 I'm using the rust bindings to the Gtk4 version of webkit2gtk. I used them with both a local build of webkit as well as with the version in the org.gnome.Sdk flatpak runtime. Connecting to the context-menu signal leads to a segmentation fault. > GLib-GObject-WARNING **: 08:53:00.267: value_to_ffi_type: Unsupported fundamental type: GdkEvent Segmentation fault (core dumped) Asking about it in the "Rust <3 Gnome" Matrix channel it was explained to me that this is an issue with webkit itself: > slomo: > value_to_ffi_type() is the libffi signal marshaller thingy from glib, and that can't handle custom fundamental types (i mean, that's what it says there 🙂 ) > the Rust code is probably correct but webkitgtk will have to use a customer marshaller for that signal > it needs to do things like here https://gitlab.gnome.org/GNOME/gtk/-/blob/master/gdk/gdksurface.c#L647-660 > important in that context is also the type annotation here https://gitlab.gnome.org/GNOME/gtk/-/blob/master/gdk/gdksurface.c#L641 > Emmanuele Bassi: > Correct. Events are instance types, and there’s no marshaller for those because GType is stupid > You need to provide a marshaller yourself > Though I’d recommend not passing around event instances to begin with I don't feel confident to prepare a patch to webkit myself. But I hope this report provides enough information. 1824339 1 mcatanzaro 2021-12-15 06:47:34 -0800 *** This bug has been marked as a duplicate of bug 233785 ***