Game ended with bad state (exit code -1)

When I press "play demo" in the launcher, the launcher close and after some seconds the launcher comes up again. When I look at the development console it says:
[19:46:02 ERROR]: Game ended with bad state (exit code -1)

[19:46:02 INFO]: Ignoring visibility rule and showing launcher due to a game crash

[19:46:02 INFO]: Deleting C:\Users\Jan\AppData\Roaming\.minecraft\versions\1.7.9\1.7.9-natives-38100228320638