Fix for issue 464

decode_test.go

@@ -4050,3 +4050,28 @@ func TestIssue429(t *testing.T) {
 		}
 	}
 }
+
+func TestIssue464(t *testing.T) {
+	type testStruct struct {
+		Name        string
+		Value       int
+		Description string
+	}
+
+	jsonValue := []byte("{\"Name\":\"Test Name\",\"Value\":\"incorrect\",\"Description\":\"Test Description\"}")
+
+	jsonData := testStruct{}
+	err := stdjson.Unmarshal(jsonValue, &jsonData)
+	assertIsType(t, "Incorrect error type stdjson", &stdjson.UnmarshalTypeError{}, err)
+
+	gojsonData := testStruct{}
+	err = json.Unmarshal(jsonValue, &gojsonData)
+	assertIsType(t, "Incorrect error type go-json", &json.UnmarshalTypeError{}, err)
+
+	assertEq(t, "Incorrect name stdjson", "Test Name", jsonData.Name)
+	assertEq(t, "Incorrect name go-json", "Test Name", gojsonData.Name)
+	assertEq(t, "Incorrect value stdjson", 0, jsonData.Value)
+	assertEq(t, "Incorrect value go-json", 0, gojsonData.Value)
+	assertEq(t, "Incorrect description stdjson", "Test Description", jsonData.Description)
+	assertEq(t, "Incorrect description go-json", "Test Description", gojsonData.Description)
+}

helper_test.go

@@ -1,6 +1,9 @@
 package json_test
 
-import "testing"
+import (
+	"reflect"
+	"testing"
+)
 
 func assertErr(t *testing.T, err error) {
 	t.Helper()
@@ -22,3 +25,12 @@ func assertNeq(t *testing.T, msg string, exp interface{}, act interface{}) {
 		t.Fatalf("failed to test for %s. expected value is not [%v] but got same value", msg, act)
 	}
 }
+
+func assertIsType(t *testing.T, msg string, exp interface{}, act interface{}) {
+	t.Helper()
+	expType := reflect.TypeOf(exp)
+	actType := reflect.TypeOf(act)
+	if expType != actType {
+		t.Fatalf("failed to test for %s. exp[%v] bug act=[%v]", msg, expType, actType)
+	}
+}

internal/decoder/struct.go

@@ -778,6 +778,7 @@ func (d *structDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsaf
 	if firstWin {
 		seenFields = make(map[int]struct{}, d.fieldUniqueNameNum)
 	}
+	var lastTypeMismatchError error
 	for {
 		c, field, err := d.keyDecoder(d, buf, cursor)
 		if err != nil {
@@ -805,7 +806,15 @@ func (d *structDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsaf
 				} else {
 					c, err := field.dec.Decode(ctx, cursor, depth, unsafe.Pointer(uintptr(p)+field.offset))
 					if err != nil {
-						return 0, err
+						if _, ok := err.(*errors.UnmarshalTypeError); ok {
+							lastTypeMismatchError = err
+							c, err = skipValue(buf, cursor, depth)
+							if err != nil {
+								return 0, err
+							}
+						} else {
+							return 0, err
+						}
 					}
 					cursor = c
 					seenFieldNum++
@@ -817,7 +826,15 @@ func (d *structDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsaf
 			} else {
 				c, err := field.dec.Decode(ctx, cursor, depth, unsafe.Pointer(uintptr(p)+field.offset))
 				if err != nil {
-					return 0, err
+					if _, ok := err.(*errors.UnmarshalTypeError); ok {
+						lastTypeMismatchError = err
+						c, err = skipValue(buf, cursor, depth)
+						if err != nil {
+							return 0, err
+						}
+					} else {
+						return 0, err
+					}
 				}
 				cursor = c
 			}
@@ -831,6 +848,9 @@ func (d *structDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsaf
 		cursor = skipWhiteSpace(buf, cursor)
 		if char(b, cursor) == '}' {
 			cursor++
+			if lastTypeMismatchError != nil {
+				return 0, lastTypeMismatchError
+			}
 			return cursor, nil
 		}
 		if char(b, cursor) != ',' {