New failing test case involving do/end blocks and upvalues.

src/test/res/upvalues3.lua

@@ -0,0 +1,14 @@
+local f
+
+do
+	local x = 10
+	function g()
+		print(x, f())
+	end
+end
+
+function f()
+	return 20
+end
+
+g()