From: Evan You <yyx990803@gmail.com>
Date: Thu, 27 Sep 2018 14:23:31 +0000 (-0400)
Subject: fix: clone vnode before mutating flags
X-Git-Tag: v3.0.0-alpha.0~1175
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=01a0fcb876c247235610ce549313cd829ee9e65b;p=thirdparty%2Fvuejs%2Fcore.git

fix: clone vnode before mutating flags
---

diff --git a/packages/core/src/optional/keepAlive.ts b/packages/core/src/optional/keepAlive.ts
index bd5e33557e..c36fc52c10 100644
--- a/packages/core/src/optional/keepAlive.ts
+++ b/packages/core/src/optional/keepAlive.ts
@@ -1,5 +1,5 @@
 import { Component, ComponentClass, MountedComponent } from '../component'
-import { VNode, Slots } from '../vdom'
+import { VNode, Slots, cloneVNode } from '../vdom'
 import { VNodeFlags } from '../flags'
 
 type MatchPattern = string | RegExp | string[] | RegExp[]
@@ -81,6 +81,11 @@ export class KeepAlive extends Component<{}, KeepAliveProps> {
     const { cache, keys } = this
     const key = vnode.key == null ? comp : vnode.key
     const cached = cache.get(key)
+
+    // clone vnode if it's reused because we are going to mutate its flags
+    if (vnode.el) {
+      vnode = cloneVNode(vnode)
+    }
     cache.set(key, vnode)
 
     if (cached) {