@Kumasasa If the game requires 1.7 to run then the Launcher should enforce it. If it does not then the crash is a bug and upgrading to the latest version of Java is a work around.
I had this issue as well. I found a work around by editing my profile in the new launcher to use Java 7 instead of Java 6.
@Kumasasa If the game requires 1.7 to run then the Launcher should enforce it. If it does not then the crash is a bug and upgrading to the latest version of Java is a work around.