Bug: Missing ionicons.woff in www/build/fonts/

I got the following error in the browser when I ran ionic serve from a freshly made tabs starter app.

Failed to load resource: the server responded with a status of 404 (Not Found)
ionicons.woff is referenced in www/build/css/app.ios.css.

Here’s my ionic info:

$ ionic info
Your system information:

Cordova CLI: 6.3.1
Gulp version: CLI version 3.9.1
Gulp local:
Ionic Framework Version: 2.0.0-rc.0
Ionic CLI Version: 2.1.0
Ionic App Lib Version: 2.1.0-beta.1
Node Version: v6.7.0

error photo