Memory management design and implementation. (#148)

backend.native/tests/runtime/collections/array_list1.kt

@@ -10,12 +10,12 @@ fun assertFalse(cond: Boolean) {
 
 fun assertEquals(value1: Any?, value2: Any?) {
     if (value1 != value2)
-        println("FAIL")
+        throw Error("FAIL " + value1 + " " + value2)
 }
 
 fun assertEquals(value1: Int, value2: Int) {
     if (value1 != value2)
-        println("FAIL")
+        throw Error("FAIL " + value1 + " " + value2)
 }
 
 fun testBasic() {

backend.native/tests/runtime/memory/basic0.kt

@@ -0,0 +1,10 @@
+class A {
+    var field: B? = null
+}
+
+class B(var field: Int)
+
+fun main(args : Array<String>) {
+    val a = A()
+    a.field = B(2)
+}