Fix: missing reserved prop ref_key, leading to unwanted property leak in SSR code generation. (fix #5563)

Author: paraboul

packages/server-renderer/__tests__/ssrRenderAttrs.spec.ts

@@ -15,6 +15,7 @@ describe('ssr: renderAttrs', () => {
     expect(
       ssrRenderAttrs({
         key: 1,
+        ref_key: 'foo',
         ref: () => {},
         onClick: () => {}
       })

packages/server-renderer/src/helpers/ssrRenderAttrs.ts

@@ -12,7 +12,7 @@ import {
 } from '@vue/shared'
 
 // leading comma for empty string ""
-const shouldIgnoreProp = makeMap(`,key,ref,innerHTML,textContent`)
+const shouldIgnoreProp = makeMap(`,key,ref,innerHTML,textContent,ref_key`)
 
 export function ssrRenderAttrs(
   props: Record<string, unknown>,