prevent unhandled rejections when loading page modules - fixes #3978 (#4732)

Author: Rich-Harris

.changeset/silver-elephants-attack.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+Prevent unhandled rejections when loading page modules

packages/kit/src/runtime/client/client.js

@@ -612,8 +612,10 @@ export function create_client({ target, session, base, trailing_slash }) {
 		/** @type {Error | null} */
 		let error = null;
 
-		// preload modules
-		a.forEach((loader) => loader());
+		// preload modules to avoid waterfall, but handle rejections
+		// so they don't get reported to Sentry et al (we don't need
+		// to act on the failures at this point)
+		a.forEach((loader) => loader().catch(() => {}));
 
 		load: for (let i = 0; i < a.length; i += 1) {
 			/** @type {import('./types').BranchNode | undefined} */