IOCCC Judge here: If you are using an xterm, you might try using "xterm -hold". It seems that the termios structure is getting (re)set with some invalid value

IOCCC Judge here: If you are using an xterm, you might try using "xterm -hold". It seems that the termios structure is getting (re)set with some invalid values and some systems (one report from NetBSD) cause the terminal / shell to abort. We are figuring out how to do an update to fix this issue.