`intern` returned as `GObject::ParamSpec`s `object.type_init`

[BlobCodes]

The following code:

class Test < GObject::ParamSpec
end

Causes a linker error:

/usr/bin/ld: T-est.o: in function `g_type':
/var/mnt/media/Projects/Other/mangaba/lib/gtk4/lib/gi-crystal/src/auto/g_object-2.0/param_spec.cr:73: undefined reference to `intern'
collect2: error: ld returned 1 exit status
Error: execution of command failed with code: 1: `cc "${@}" -o /var/home/blobcodes/.cache/crystal/crystal-run-test2.tmp  -rdynamic -L/usr/lib64/crystal -lgtk-4 -lgio-2.0 -lgobject-2.0 -lglib-2.0  -lgobject-2.0 -lglib-2.0  -lglib-2.0  -lgobject-2.0 -lglib-2.0  -lpcre -lm -lgc -lpthread -levent  -lrt -lpthread -ldl`

This is because object.type_init returns the string "internal" for GObject::ParamSpec, leading to this code:

    # Returns the type id (GType) registered in GLib type system.
    def self.g_type : UInt64
      LibGObject.intern
    end

AFAICT this seems to be a special value, in which case there should just be a compiler error.
I have no real use-case where this matters but this issue could show errors in the cooperation with gobject-introspection.

[hugopl]

the problem is that gobject introspection returns a lot of bad information for ParamSpec, so I think the easier way to fix that is adding a include file for ParamSpec that disallow inheritance.