Ignore load request on same level in state

go/engine/engine.go

@@ -38,17 +38,6 @@ func(en *Engine) Init(sym string, ctx context.Context) error {
 	if err != nil {
 		return err
 	}
-//	location := en.st.Where()
-//	code, err := en.rs.GetCode(location)
-//	if err != nil {
-//		return err
-//	}
-//	if len(code) == 0 {
-//		return fmt.Errorf("no code found at resource %s", en.rs)
-//	}
-//
-//	code, err = vm.Run(code, en.st, en.rs, ctx)
-//
 	en.st.SetCode(b)
 	return nil
 }

go/state/state.go

@@ -238,6 +238,10 @@ func(st *State) Add(key string, value string, sizeLimit uint16) error {
 	}
 	checkFrame := st.frameOf(key)
 	if checkFrame > -1 {
+		if checkFrame == len(st.execPath) - 1 {
+			log.Printf("Ignoring load request on frame that has symbol already loaded")
+			return nil
+		}
 		return fmt.Errorf("key %v already defined in frame %v", key, checkFrame)
 	}
 	sz := st.checkCapacity(value)

go/state/state_test.go

@@ -227,6 +227,11 @@ func TestStateLoadDup(t *testing.T) {
 	if err == nil {
 		t.Errorf("expected fail on duplicate load")
 	}
+	st.Up()
+	err = st.Add("foo", "xyzzy", 0)
+	if err != nil {
+		t.Error(err)
+	}
 }
 
 func TestStateCurrentSize(t *testing.T) {