fix: Judge invalid value

Change-Id: Ib8fd49c14b04f49df893bc6fe56545434ddf5859

Author: andeya

tagexpr.go

@@ -146,6 +146,9 @@ func (vm *VM) RunAny(v interface{}, fn func(*TagExpr, error) error) error {
 
 func (vm *VM) subRunAll(omitNil bool, tePath string, value reflect.Value, fn func(*TagExpr, error) error) error {
 	rv := goutil.DereferenceIfaceValue(value)
+	if !rv.IsValid() {
+		return nil
+	}
 	rt := goutil.DereferenceType(rv.Type())
 	rv = goutil.DereferenceValue(rv)
 	switch rt.Kind() {

validator/validator_test.go

@@ -26,7 +26,7 @@ func TestAll(t *testing.T) {
 	assert.EqualError(t, vd.Validate(new(T), true), "invalid parameter: a\tinvalid parameter: f.g")
 }
 
-func TestIssue(t *testing.T) {
+func TestIssue1(t *testing.T) {
 	type MailBox struct {
 		Address *string `vd:"email($)"`
 		Name    *string
@@ -67,3 +67,17 @@ func TestIssue(t *testing.T) {
 	}
 	assert.EqualError(t, vd.Validate(req, true), "invalid parameter: Msg.Recipients[0].Address")
 }
+
+func TestIssue2(t *testing.T) {
+	type a struct {
+		m map[string]interface{}
+	}
+	A := &a{
+		m: map[string]interface{}{
+			"1": 1,
+			"2": nil,
+		},
+	}
+	v := vd.New("vd")
+	assert.NoError(t, v.Validate(A))
+}