From da944cb37987212d1b1a860b79f43a7c85814225 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 25 Mar 2021 18:04:21 -0400
Subject: [PATCH] fix(ssr): fix memory leak when vnode component render throws
 error

fix #3100
---
 packages/runtime-core/src/componentRenderUtils.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/runtime-core/src/componentRenderUtils.ts b/packages/runtime-core/src/componentRenderUtils.ts
index 89cdcf19c9..eee05f18bb 100644
--- a/packages/runtime-core/src/componentRenderUtils.ts
+++ b/packages/runtime-core/src/componentRenderUtils.ts
@@ -10,7 +10,8 @@ import {
   Comment,
   cloneVNode,
   VNodeArrayChildren,
-  isVNode
+  isVNode,
+  blockStack
 } from './vnode'
 import { handleError, ErrorCodes } from './errorHandling'
 import { PatchFlags, ShapeFlags, isOn, isModelListener } from '@vue/shared'
@@ -201,6 +202,7 @@ export function renderComponentRoot(
       result = root
     }
   } catch (err) {
+    blockStack.length = 0
     handleError(err, instance, ErrorCodes.RENDER_FUNCTION)
     result = createVNode(Comment)
   }
-- 
2.47.2