Visual D DClosure mixin error?

[Bart]

I'm getting DClosure mixin not found when trying to go to a 
delegate on the stack.

DClosure.DClosure.d_closure_marshal!(bool 
delegate(gdk.Event.Event, 
gtk.Widget.Widget)).d_closure_marshal(gobject.c.types.GClosure * 
closure, gobject.c.types.GValue * return_value, unsigned int 
n_param_values, gobject.c.types.GValue * param_values, void * 
invocation_hint, void * marshal_data) Line 123	D

This is a file in GtkD.

It says it's like 123 but it's actually line 121.

Dclosure.d
	extern(C) static void d_closure_marshal(T)(GClosure* closure, 
GValue* return_value, uint n_param_values, /*const*/ GValue* 
param_values, void* invocation_hint, void* marshal_data)
	{
		DGClosure!(T)* cl = cast(DGClosure!(T)*)closure;

		if ( Parameters!(T).length > n_param_values )
			assert(false, "DClosure doesn't have enough parameters.");

		if ( closure.derivativeFlag )
		{
			GValue[] swapped = new GValue[n_param_values];
			swapped[0..n_param_values-1] = param_values[1..n_param_values];
			swapped[n_param_values-1] = param_values[0];
			param_values = swapped.ptr;
		}

		mixin(getCallbackCall!T()); // line 121 but stack trace says 
it's 123.
	}


Seems it can't find the line nor the mixin in file correctly.

The main mixin does not seem to have this code in it either but 
it has other code related to other mixins from gtkD so it

Do you have gtk installed or are you willing to install it? The 
closure is generated for most event handling in gtkD it seems 
such as simple button click handling. Probably any gtkD example 
will produce such a stack.