From ef3038593b202edbad40e0a5400eb33915e63f52 Mon Sep 17 00:00:00 2001
From: Tao Wen <taowen@gmail.com>
Date: Sat, 17 Feb 2018 22:33:09 +0800
Subject: [PATCH] check nil for interface{}

---
 feature_reflect_native.go |  4 ++--
 type_tests/struct_test.go |  4 ++--
 type_tests/type_test.go   | 11 +++++++++++
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/feature_reflect_native.go b/feature_reflect_native.go
index 57c388c..9a6150a 100644
--- a/feature_reflect_native.go
+++ b/feature_reflect_native.go
@@ -599,7 +599,7 @@ type marshalerEncoder struct {
 
 func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	obj := encoder.valType.UnsafeIndirect(ptr)
-	if obj == nil {
+	if reflect2.IsNil(obj) {
 		stream.WriteNil()
 		return
 	}
@@ -623,7 +623,7 @@ type textMarshalerEncoder struct {
 
 func (encoder *textMarshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	obj := encoder.valType.UnsafeIndirect(ptr)
-	if obj == nil {
+	if reflect2.IsNil(obj) {
 		stream.WriteNil()
 		return
 	}
diff --git a/type_tests/struct_test.go b/type_tests/struct_test.go
index b25fc7b..25162fe 100644
--- a/type_tests/struct_test.go
+++ b/type_tests/struct_test.go
@@ -251,8 +251,8 @@ func init() {
 		})(nil),
 		(*struct {
 			TF1 struct {
-				F1 withTime
-				F2 *withTime
+				F2 int
+				F1 *withTime
 			}
 		})(nil),
 		(*DeeplyNested)(nil),
diff --git a/type_tests/type_test.go b/type_tests/type_test.go
index f615e19..c4fb435 100644
--- a/type_tests/type_test.go
+++ b/type_tests/type_test.go
@@ -15,7 +15,18 @@ import (
 var testCases []interface{}
 var asymmetricTestCases [][2]interface{}
 
+type selectedSymmetricCase struct {
+	testCase interface{}
+}
+
 func Test_symmetric(t *testing.T) {
+	for _, testCase := range testCases {
+		selectedSymmetricCase, found := testCase.(selectedSymmetricCase)
+		if found {
+			testCases = []interface{}{selectedSymmetricCase.testCase}
+			break
+		}
+	}
 	for _, testCase := range testCases {
 		valType := reflect.TypeOf(testCase).Elem()
 		t.Run(valType.String(), func(t *testing.T) {