diff --git a/engine/load.go b/engine/load.go
index d7f14132..9255118d 100644
--- a/engine/load.go
+++ b/engine/load.go
@@ -36,6 +36,7 @@ import (
 func Load(cfg config.Config) (err error) {
 
 	defer func() { err = exception.Catch(recover()) }()
+	exception.Mode = cfg.Mode
 
 	// SET XGEN_BASE
 	adminRoot := "yao"
diff --git a/widgets/hook/hook.go b/widgets/hook/hook.go
index 08952eab..baeff617 100644
--- a/widgets/hook/hook.go
+++ b/widgets/hook/hook.go
@@ -8,14 +8,14 @@ import (
 
 // CopyBefore copy a before hook
 func CopyBefore(hook *Before, new *Before) {
-	if hook != nil {
+	if hook != nil && new != nil {
 		*hook = *new
 	}
 }
 
 // CopyAfter copy a after hook
 func CopyAfter(hook *After, new *After) {
-	if hook != nil {
+	if hook != nil && new != nil {
 		*hook = *new
 	}
 }