Compiling this file crashes the compiler
❯ valac crash.vala
crash.vala:33.15-33.19: error: invocation not supported in this context
33 | print("%d", h.x());
| ^~~~~
(valac:53302): GLib-GObject-WARNING **: 03:02:53.428: invalid cast from 'ValaInterface' to 'ValaClass'
[1] 53302 segmentation fault valac crash.vala
❯ valac --version
Vala 0.56.2