When I select the Snapshot 13w16b and click Play, a crash report shows up.
What I expected to happen was...:
Minecraft starts normal with the Snapshot.
What actually happened was...:
Minecraft Dev Launcher opened a new "tab" and showed me the crash, crash file attached.
Steps to Reproduce:
1. Open Dev Launcher
2. Select Snapshot 13w16b
3. Click Play
Environment
OS: Windows 8 (ver 6.2, arch x86)
Java: 1.7.0_21 (by Oracle Corporation)
Launcher: 0.5 (Dev) (bootstrap 1)
Duplicate of MC-4947.