fix: Don't try to process routes with no component

Since routes with no component (like routes just existing to act as
a redirect) would cause a crash, don't try to process them.

src/helpers/routes.js

@@ -24,6 +24,11 @@ exports.makeRoutes = (baseRoutes, {
     const routes = []
     let pageOptions
 
+    // Skip route if it is only a redirect without a component.
+    if (route.redirect && !route.component) {
+      return route
+    }
+
     // Extract i18n options from page
     if (parsePages) {
       pageOptions = extractComponentOptions(route.component)

test/module.test.js

@@ -9,7 +9,15 @@ describe('basic', () => {
   let nuxt
 
   beforeAll(async () => {
-    nuxt = (await setup(loadConfig(__dirname, 'basic'))).nuxt
+    const override = {
+      router: {
+        extendRoutes (routes) {
+          routes.push({ path: '/about', redirect: '/about-us' })
+        }
+      }
+    }
+
+    nuxt = (await setup(loadConfig(__dirname, 'basic', override, { merge: true }))).nuxt
   })
 
   afterAll(async () => {
@@ -126,6 +134,12 @@ describe('basic', () => {
     const newRoute = window.$nuxt.localePath('about')
     expect(newRoute).toBe('/about-us')
   })
+
+  test('redirects to existing route', async () => {
+    const window = await nuxt.renderAndGetWindow(url('/about'))
+    const newRoute = window.$nuxt.switchLocalePath()
+    expect(newRoute).toBe('/about-us')
+  })
 })
 
 describe('lazy loading', () => {