From 464e39b5e4808d6f3f1d0cbf8cad0cbbf453f258 Mon Sep 17 00:00:00 2001
From: Hiroki Osame <hiroki@weebly.com>
Date: Thu, 9 Aug 2018 19:38:58 +0100
Subject: [PATCH 1/3] test(component-slot): new child vnode gets destroyed
 instead of old one

fix #8337
---
 .../features/component/component-slot.spec.js | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/test/unit/features/component/component-slot.spec.js b/test/unit/features/component/component-slot.spec.js
index e667a46ef89..ed8215fdf1b 100644
--- a/test/unit/features/component/component-slot.spec.js
+++ b/test/unit/features/component/component-slot.spec.js
@@ -886,4 +886,47 @@ describe('Component slot', () => {
       expect(vm.$el.textContent).toBe('foo')
     }).then(done)
   })
+
+  // #8337
+  it('should not destroy the new child vm', done => {
+    const Parent = {
+      render (h) {
+        return h(this.API.tag, this.$slots.default)
+      },
+      data () {
+        return { API: { tag: 'p' }}
+      },
+      provide () {
+        return { key: this.API }
+      }
+    }
+
+    const Child = {
+      template: '<div></div>',
+      inject: { wrapper: 'key' },
+      created () {
+        this.wrapper.tag = 'div'
+      }
+    }
+
+    const vm = new Vue({
+      components: {
+        Child,
+        Parent
+      },
+      template: `
+        <parent>
+          <div>
+            <child ref="child" />
+          </div>
+        </parent>
+      `
+    }).$mount()
+
+    expect(vm.$refs.child).toBeDefined()
+
+    waitForUpdate(() => {
+      expect(vm.$refs.child).toBeDefined()
+    }).then(done)
+  })
 })

From 14133787d42991426a05dd7479b7c8e36df1c806 Mon Sep 17 00:00:00 2001
From: Hiroki Osame <hiroki@weebly.com>
Date: Thu, 9 Aug 2018 19:53:25 +0100
Subject: [PATCH 2/3] fix(patch): Deep clone vnode when used in previous render

fix #8337
---
 src/core/vdom/patch.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/vdom/patch.js b/src/core/vdom/patch.js
index fb28d8cd341..eb790d9a906 100644
--- a/src/core/vdom/patch.js
+++ b/src/core/vdom/patch.js
@@ -138,6 +138,9 @@ export function createPatchFunction (backend) {
       // reference node. Instead, we clone the node on-demand before creating
       // associated DOM element for it.
       vnode = ownerArray[index] = cloneVNode(vnode)
+      if (vnode.children) {
+        vnode.children = vnode.children.map(cloneVNode)
+      }
     }
 
     vnode.isRootInsert = !nested // for transition enter check

From 9114bca874990fba73f7156a08199bca53e9c9ed Mon Sep 17 00:00:00 2001
From: Hiroki Osame <hiroki@weebly.com>
Date: Thu, 9 Aug 2018 20:05:21 +0100
Subject: [PATCH 3/3] retrigger test