[MC-19437] Game ended with bad state (exit code 134) (Nether)

Hi,
I got the 'game ended' after going to nether. A ghast attack me first, it destroy portal (no flint and steel with me) I died. I'll go back across portal when i come Ghast always here and game stop :

27 juin 2013 18:17:30 net.minecraft.launcher.process.ProcessMonitorThread run
GRAVE: null
java.io.IOException: Stream closed
	at java.io.BufferedReader.ensureOpen(BufferedReader.java:114)
	at java.io.BufferedReader.readLine(BufferedReader.java:309)
	at java.io.BufferedReader.readLine(BufferedReader.java:379)
	at net.minecraft.launcher.process.ProcessMonitorThread.run(ProcessMonitorThread.java:26)
27 juin 2013 18:17:30 net.minecraft.launcher.process.ProcessMonitorThread run
GRAVE: null
java.io.IOException: Stream closed
	at java.io.BufferedReader.ensureOpen(BufferedReader.java:114)
	at java.io.BufferedReader.readLine(BufferedReader.java:309)
	at java.io.BufferedReader.readLine(BufferedReader.java:379)
	at net.minecraft.launcher.process.ProcessMonitorThread.run(ProcessMonitorThread.java:26)
27 juin 2013 18:17:30 net.minecraft.launcher.process.ProcessMonitorThread run
GRAVE: null
java.io.IOException: Stream closed
	at java.io.BufferedReader.ensureOpen(BufferedReader.java:114)
	at java.io.BufferedReader.readLine(BufferedReader.java:309)
	at java.io.BufferedReader.readLine(BufferedReader.java:379)
	at net.minecraft.launcher.process.ProcessMonitorThread.run(ProcessMonitorThread.java:26)
27 juin 2013 18:17:30 net.minecraft.launcher.process.ProcessMonitorThread run
GRAVE: null
java.io.IOException: Stream closed
	at java.io.BufferedReader.ensureOpen(BufferedReader.java:114)
	at java.io.BufferedReader.readLine(BufferedReader.java:309)
	at java.io.BufferedReader.readLine(BufferedReader.java:379)
	at net.minecraft.launcher.process.ProcessMonitorThread.run(ProcessMonitorThread.java:26)
27 juin 2013 18:17:30 net.minecraft.launcher.process.ProcessMonitorThread run
GRAVE: null
java.io.IOException: Stream closed
	at java.io.BufferedReader.ensureOpen(BufferedReader.java:114)
	at java.io.BufferedReader.readLine(BufferedReader.java:309)
	at java.io.BufferedReader.readLine(BufferedReader.java:379)
	at net.minecraft.launcher.process.ProcessMonitorThread.run(ProcessMonitorThread.java:26)
27 juin 2013 18:17:30 net.minecraft.launcher.process.ProcessMonitorThread run
GRAVE: null
java.io.IOException: Stream closed
	at java.io.BufferedReader.ensureOpen(BufferedReader.java:114)
	at java.io.BufferedReader.readLine(BufferedReader.java:309)
	at java.io.BufferedReader.readLine(BufferedReader.java:379)
	at net.minecraft.launcher.process.ProcessMonitorThread.run(ProcessMonitorThread.java:26)
Game ended with bad state (exit code 134)
Deleting /home/[...]/.minecraft/versions/1.6/1.6-natives-311172190886564

I'm running under debian wheezy (Debian 3.2.46-1 x86_64 GNU/Linux).