I know it's nonsensical, but (set! display #f) in a fresh interpreter causes an infinite loop.
Interrupting with Ctrl+C exits guile. scheme@(guile-user)> (set! display #f) While reading expression: Wrong type to apply: Error while printing exception. While reading expression: Wrong type to apply: Error while printing exception. While reading expression: Wrong type to apply: Error while printing exception. While reading expression: Wrong type to apply: Error while printing exception. [...] -- bryce
