Prevent unecessary Exception with non-existent links

Closes #1386

Author: posva

src/create-matcher.js

@@ -35,6 +35,7 @@ export function createMatcher (
       const record = nameMap[name]
       if (process.env.NODE_ENV !== 'production') {
         warn(record, `Route with name '${name}' does not exist`)
+        return _createRoute(null, location)
       }
       const paramNames = record.regex.keys
         .filter(key => !key.optional)

test/unit/specs/create-matcher.spec.js

@@ -21,9 +21,9 @@ describe('Creating Matcher', function () {
 
   it('in development, has logged a warning if a named route does not exist', function () {
     process.env.NODE_ENV = 'development'
-    expect(() => {
-      match({ name: 'bar' }, routes[0]);
-    }).toThrow(new TypeError('Cannot read property \'regex\' of undefined'));
+    const { name, matched } = match({ name: 'bar' }, routes[0])
+    expect(matched.length).toBe(0)
+    expect(name).toBe('bar')
     expect(console.warn).toHaveBeenCalled()
     expect(console.warn.calls.argsFor(0)[0]).toMatch('Route with name \'bar\' does not exist');
   })