Put the summary of the bug you're having here
What I expected to happen was...:
Describe what you thought should happen here
What actually happened was...:
Describe what happened here
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...
Environment
OS: Windows 8.1 (ver 6.3, arch amd64)
Java: 1.8.0_25 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.6.11 (bootstrap 100)
Minecraft: 1.7.9 (updated Mon Apr 14 15:29:23 CEST 2014)
Looks like you're just running out of memory, aka you should increase "-Xmx1G" to something like 2G or 4G.