check nil for interface{}

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),

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) {