Router: Using UrlMatcher function throws error that path is not defined

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[ ] feature request
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Current behavior

When using the matcher function in Routes, it throws an error that no path has been defined.

Sample Config according to source code:

function matcherFunction(url: UrlSegment[]) {
     if (url.length == 1 && url[0].path.startsWith('sample-url')) {
         return {consumed: url};
     }
     return null;
 }

const routes: Routes = [
    {
        matcher: matcherFunction,
        component: ComponentToUse
    }
];

The issue is in these 3 error messages:

https://github.com/angular/angular/blob/master/modules/@angular/router/src/config.ts#L409

These error messages should be corrected to consider an existing matcher function. When omitting these 3 errors, it works as intended.

Expected behavior

It should execute the matcher function and route to the correct component for the given url

Minimal reproduction of the problem with instructions

Just add the provided matcher function and omit the path property for any given route

plnkr: http://plnkr.co/edit/vtpDnJQ4YGtuRAryknqo?p=preview

What is the motivation / use case for changing the behavior?

My usecase is to have a matcher for a route with an optional id so the routes: /news-articles and /news-articles/:id

are one route so the component does not get initialised again when navigating from /news-articles to /news-articles/:id

Please tell us about your environment: Mac OS Sierra 10.12.1, VScode 1.7.1

• Angular version: 2.2.2 Router version 3.2.2

• Browser: all

• Language: Typescript

• Node (for AoT issues): node --version = 6.9.1

[skreborn]

@bontscho Please add a plunker that reproduces your problem. The team has no capacity to reproduce each and every issue on their own based on instructions.

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