fix: prevent memory leak due to circular reference in vnodes

yyx990803 · yyx990803 · commit 405d8e9f4c32 · 2017-10-09T11:48:19.000-04:00
fix #6759
diff --git a/src/core/instance/lifecycle.js b/src/core/instance/lifecycle.js
@@ -133,6 +133,10 @@ export function lifecycleMixin (Vue: Class<Component>) {
     if (vm.$el) {
       vm.$el.__vue__ = null
     }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null
+    }
   }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -133,6 +133,10 @@ export function lifecycleMixin (Vue: Class<Component>) {`
`133`	`133`	`if (vm.$el) {`
`134`	`134`	`vm.$el.__vue__ = null`
`135`	`135`	`}`
	`136`	`+ // release circular reference (#6759)`
	`137`	`+ if (vm.$vnode) {`
	`138`	`+ vm.$vnode.parent = null`
	`139`	`+ }`
`136`	`140`	`}`
`137`	`141`	`}`
`138`	`142`