I'm using Vala 0.9.7.

I'm creating a generic class that has a signal.  That signal's sole parameter is of type 'G', the abstract type:

public class Generic<G> {
    public signal void sig(G item);
    
    public virtual void fire(G item) {
        sig(item);
    }
}

When I include in the code the line to connect to the signal, the compiler crashes with this assertion:

ERROR:valasemanticanalyzer.c:2953:vala_semantic_analyzer_get_actual_type: assertion failed: (instance_type != NULL)

I've attached a test case.