fix panic on map[string]interface{} encode (#53)

Author: Exitialis

encoder.go

@@ -181,7 +181,7 @@ func (e *encoder) setFieldByType(current reflect.Value, namespace []byte, idx in
 			namespace = append(namespace, s...)
 			namespace = append(namespace, ']')
 
-			e.setFieldByType(current.MapIndex(key), namespace, -2, false)
+			e.setFieldByType(v.MapIndex(key), namespace, -2, false)
 		}
 
 	case reflect.Struct:

encoder_test.go

@@ -1018,6 +1018,23 @@ func TestEncoderStruct(t *testing.T) {
 	Equal(t, val[0], tm.Format(time.RFC3339))
 }
 
+func TestEncoderMap(t *testing.T) {
+	inner := map[string]interface{}{
+		"inner": "1",
+	}
+
+	outer := map[string]interface{}{
+		"outer": inner,
+	}
+
+	enc := NewEncoder()
+	values, _ := enc.Encode(outer)
+
+	val, ok := values["[outer][inner]"]
+	Equal(t, ok, true)
+	Equal(t, val[0], "1")
+}
+
 func TestDecodeAllNonStructTypes(t *testing.T) {
 
 	encoder := NewEncoder()