Fix as option with optional catch all routes url object syntax

packages/next/shared/lib/router/router.ts

@@ -1505,7 +1505,7 @@ export default class Router implements BaseRouter {
 
       if (!routeMatch || (shouldInterpolate && !interpolatedAs.result)) {
         const missingParams = Object.keys(routeRegex.groups).filter(
-          (param) => !query[param]
+          (param) => !query[param] && !routeRegex.groups[param].optional
         )
 
         if (missingParams.length > 0 && !isMiddlewareMatch) {

test/integration/rewrites-manual-href-as/next.config.js

@@ -5,6 +5,10 @@ module.exports = {
         source: '/rewrite-me',
         destination: '/another',
       },
+      {
+        source: '/blog/:slugs*',
+        destination: '/news/:slugs*',
+      },
     ]
   },
 }

test/integration/rewrites-manual-href-as/pages/news/[[...slugs]].js

@@ -0,0 +1,22 @@
+import Link from 'next/link'
+import { useRouter } from 'next/router'
+
+export default function News() {
+  const { asPath, pathname, query } = useRouter()
+
+  return (
+    <div>
+      <h1 id="news">news page</h1>
+      <p id="asPath">{asPath}</p>
+      <p id="pathname">{pathname}</p>
+      <p id="query">{JSON.stringify(query)}</p>
+      <Link href="/">&larr; Back home</Link>
+    </div>
+  )
+}
+
+export async function getServerSideProps() {
+  return {
+    props: {},
+  }
+}

test/integration/rewrites-manual-href-as/pages/preview/[slug].js

@@ -55,6 +55,15 @@ export default function Page(props) {
         go to /preview/321 as /rewrite-me
       </Link>
       <br />
+
+      <Link
+        href={{ pathname: '/news/[[...slugs]]', query: { slugs: [] } }}
+        as="/blog"
+        id="to-news-as-blog"
+      >
+        go to /news as /blog
+      </Link>
+      <br />
     </>
   )
 }

test/integration/rewrites-manual-href-as/test/index.test.js

@@ -144,6 +144,18 @@ const runTests = () => {
     expect(JSON.parse(await browser.elementByCss('#query').text())).toEqual({
       slug: '321',
     })
+
+    await browser.back().waitForElementByCss('#preview')
+
+    await browser
+      .elementByCss('#to-news-as-blog')
+      .click()
+      .waitForElementByCss('#news')
+
+    expect(await browser.elementByCss('#news').text()).toBe('news page')
+    expect(await browser.elementByCss('#asPath').text()).toBe('/blog')
+    expect(await browser.eval('window.beforeNav')).toBe(1)
+    expect(JSON.parse(await browser.elementByCss('#query').text())).toEqual({})
   })
 }