fix: regression when calculating params and pattern (#9051)

* fix: regression when calculating params and pattern

* changeset

2 files changed, 18 insertions, 3 deletions

diff --git a/packages/integrations/sitemap/test/fixtures/static/astro.config.mjs b/packages/integrations/sitemap/test/fixtures/static/astro.config.mjs
index 1b53c53a8..f0288b6dd 100644
--- a/packages/integrations/sitemap/test/fixtures/static/astro.config.mjs
+++ b/packages/integrations/sitemap/test/fixtures/static/astro.config.mjs
@@ -4,7 +4,7 @@ import sitemap from '@astrojs/sitemap';
 export default defineConfig({
   integrations: [sitemap()],
 	site: 'http://example.com',
-  redirects: {
-    '/redirect': '/'
-  },
+      redirects: {
+        '/redirect': '/'
+      },
 })
diff --git a/packages/integrations/sitemap/test/fixtures/static/src/pages/[lang]/manifest.ts b/packages/integrations/sitemap/test/fixtures/static/src/pages/[lang]/manifest.ts
new file mode 100644
index 000000000..907b94a21
--- /dev/null
+++ b/packages/integrations/sitemap/test/fixtures/static/src/pages/[lang]/manifest.ts
@@ -0,0 +1,15 @@
+export const GET: APIRoute = async ({ params }) => {
+	const { lang } = params;
+
+	return new Response(`I'm a route in the "${lang}" language.`);
+};
+
+export async function getStaticPaths() {
+	return ['it', 'en'].map((language) => {
+		return {
+			params: {
+				lang: language,
+			},
+		};
+	});
+}