From 3867bb4c14131ef94098a62bffba97a5b7d1fe66 Mon Sep 17 00:00:00 2001
From: Bas van Meurs <bvanmeurs1985@gmail.com>
Date: Sat, 5 Dec 2020 00:03:10 +0100
Subject: [PATCH] fix(runtime-core): component mount anchor memory leak (#2459)

fix #2458
---
 packages/runtime-core/src/renderer.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/runtime-core/src/renderer.ts b/packages/runtime-core/src/renderer.ts
index 3baaf2405ea..da86040d0a1 100644
--- a/packages/runtime-core/src/renderer.ts
+++ b/packages/runtime-core/src/renderer.ts
@@ -1395,8 +1395,9 @@ function baseCreateRenderer(
         }
         // onVnodeMounted
         if ((vnodeHook = props && props.onVnodeMounted)) {
+          const scopedInitialVNode = initialVNode
           queuePostRenderEffect(() => {
-            invokeVNodeHook(vnodeHook!, parent, initialVNode)
+            invokeVNodeHook(vnodeHook!, parent, scopedInitialVNode)
           }, parentSuspense)
         }
         // activated hook for keep-alive roots.
@@ -1410,6 +1411,9 @@ function baseCreateRenderer(
           queuePostRenderEffect(a, parentSuspense)
         }
         instance.isMounted = true
+
+        // #2458: deference mount-only object parameters to prevent memleaks
+        initialVNode = container = anchor = null as any
       } else {
         // updateComponent
         // This is triggered by mutation of component's own state (next: null)