4016 – const initializer cannot forward reference other const initializer

comipiling
----
const PM_QS_INPUT = QS_INPUT;
const QS_INPUT = 2;
----
produces:
test.d(1): Error: forward reference of variable QS_INPUT
Here's a patch:
Index: expression.c
===================================================================
--- expression.c	(revision 421)
+++ expression.c	(working copy)
@@ -2395,7 +2395,9 @@
 {
 	//printf("Identifier '%s' is a variable, type '%s'\n", toChars(), v->type->toChars());
 	if (!type)
-	{ type = v->type;
+	{ if (!v->type && v->scope)
+		v->semantic(v->scope);
+	 type = v->type;
 	 if (!v->type)
 	 {	error("forward reference of %s %s", v->kind(), v->toChars());
 		type = Type::terror;

changeset 481

Fixed DMD2.046.