From f1e37f6002712465e7d67a7e9f84b2c9900b896c Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 29 Sep 2016 12:52:05 -0400
Subject: [PATCH] do not add list key to text nodes (fix #3810)

---
 src/core/vdom/helpers.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/vdom/helpers.js b/src/core/vdom/helpers.js
index e5d930ab9..d3a280b07 100644
--- a/src/core/vdom/helpers.js
+++ b/src/core/vdom/helpers.js
@@ -35,7 +35,7 @@ export function normalizeChildren (
             applyNS(c, ns)
           }
           // default key for nested array children (likely generated by v-for)
-          if (c.key == null && nestedIndex != null) {
+          if (c.tag && c.key == null && nestedIndex != null) {
             c.key = `__vlist_${nestedIndex}_${i}__`
           }
           res.push(c)