From 607a4887d0c5c6d92b402ae385cc4c6e21067cf8 Mon Sep 17 00:00:00 2001
From: aozhiwei <aozhiwei@kingsome.cn>
Date: Thu, 12 Aug 2021 15:43:51 +0800
Subject: [PATCH] 1

---
 xobject.go | 3 ++-
 xvalue.go  | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/xobject.go b/xobject.go
index 875fb7e..5090ecd 100644
--- a/xobject.go
+++ b/xobject.go
@@ -1,6 +1,7 @@
 package q5
 
 import (
+	"reflect"
 	"net/url"
 	"encoding/json"
 )
@@ -223,7 +224,7 @@ func (this *XObject) fromInterface(iVal interface{}) *XObject {
 		this._type = XOT_SIMPLE
 		this._val = NewXUndefined()
 		if !this.AsXValue().TryFromInterface(iVal) {
-			panic("XObject.fromInterface type error2")
+			panic("XObject.fromInterface type error2 type" + reflect.TypeOf(iVal).String())
 		}
 	}
 	return this
diff --git a/xvalue.go b/xvalue.go
index 74e9584..60b7cf3 100644
--- a/xvalue.go
+++ b/xvalue.go
@@ -271,6 +271,11 @@ func (this *XValue) ToJsonInterface() interface{} {
 }
 
 func (this *XValue) TryFromInterface(val interface{}) bool {
+	if val == nil {
+		this._type = XVT_UNDEFINED
+		this._val = nil
+		return true
+	}
 	switch val.(type) {
 	case int8:
 		this.SetInt8(val.(int8))