From 45a01f1efa6632d9c6ab3e7b790b64b250a5bbf8 Mon Sep 17 00:00:00 2001
From: Thorsten Luenborg <t.luenborg@googlemail.com>
Date: Thu, 23 Feb 2023 10:47:09 +0100
Subject: [PATCH] fix(compat): ensure proper handling of render fuction from
 SFC using Vue.extend

fix: #7766
---
 packages/runtime-core/src/compat/component.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/runtime-core/src/compat/component.ts b/packages/runtime-core/src/compat/component.ts
index b09d579a59a..7248b0ed700 100644
--- a/packages/runtime-core/src/compat/component.ts
+++ b/packages/runtime-core/src/compat/component.ts
@@ -18,6 +18,15 @@ export function convertLegacyComponent(
 
   // 2.x constructor
   if (isFunction(comp) && comp.cid) {
+    // #7766
+    if (comp.render) {
+      // only necessary when compiled from SFC
+      comp.options.render = comp.render
+    }
+    // copy over internal properties set by the SFC compiler
+    comp.options.__file = comp.__file
+    comp.options.__hmrId = comp.__hmrId
+    comp.options.__scopeId = comp.__scopeId
     comp = comp.options
   }