Game crashes when you try to open realms

When you open up Minecraft and you are on the main menu, clicking on Minecraft Realms will crash the game.

What I expected to happen was...:
Text to tell me that Realms cannot be played in snapshots.

What actually happened was...:
The Minecraft Tab closes without leaving the Menu

Steps to Reproduce:
1. Open up Minecraft
2. Click on 'Minecraft Realms'