Fix tuple declarations in aggregates.

dmd/declaration.c

@@ -767,13 +767,16 @@ void VarDeclaration::semantic(Scope *sc)
 	    VarDeclaration *v = new VarDeclaration(loc, arg->type, id, ti);
 	    //printf("declaring field %s of type %s\n", v->toChars(), v->type->toChars());
 	    v->semantic(sc);
-
+            
+/*
+// removed for LDC since TupleDeclaration::toObj already creates the fields;
+// adding them to the scope again leads to duplicates
 	    if (sc->scopesym)
 	    {	//printf("adding %s to %s\n", v->toChars(), sc->scopesym->toChars());
 		if (sc->scopesym->members)
 		    sc->scopesym->members->push(v);
 	    }
-
+*/
 	    Expression *e = new DsymbolExp(loc, v);
 	    exps->data[i] = e;
 	}

tests/mini/tuplestruct.d

@@ -0,0 +1,15 @@
+struct V(T...) {
+    T v;
+}
+
+alias V!(Object, int) MyV;
+
+void main()
+{
+    assert(MyV.sizeof == Object.sizeof + int.sizeof);
+    auto o = new Object;
+    auto v = MyV(o, 3);
+    assert(v.v[0] is o);
+    assert(v.v[1] == 3);
+}
+