From c73847f2becc20f03cb9c68748eea92455e688ee Mon Sep 17 00:00:00 2001
From: =?utf8?q?Thorsten=20L=C3=BCnborg?= <t.luenborg@googlemail.com>
Date: Fri, 31 May 2024 17:49:18 +0200
Subject: [PATCH] fix(compat): ensure proper handling of render fuction from
 SFC using Vue.extend (#7781)

close #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 84a76eb73a..da12e60c58 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
   }
 
-- 
2.47.3