fix: goroutine内引用err, 可能引起panic
fix: goroutine内引用err, 可能引起panic

open-falcon/falcon-plus,taomaree/falcon-plus,open-falcon/falcon-plus,taomaree/falcon-plus,open-falcon/falcon-plus,open-falcon/falcon-plus,taomaree/falcon-plus,taomaree/falcon-plus,taomaree/falcon-plus,taomaree/falcon-plus,open-falcon/falcon-plus