Audio Button Crashes Game

When hitting my Play/Pause button on both my Mouse and Keyboard crashed Minecraft. It has crashed at the menu and in game.

Steps to reproduce:
1. At Menu (or in game) press Play/Pause button.
2. Game crashes...

This never happened until I upgraded to the snapshot.

EDIT: Tested hitting the "Next" button and that will also reproduce this. It seems any audio related buttons will crash.