\____/\/ /_/\____/|_| Type :? for help.
Loading package std ... linking ... done.
-*** WARNING: . is writable by someone else, IGNORING!
-*** WARNING: ./.ghci is writable by someone else, IGNORING!
Prelude> :unset +s +t
Prelude> :set -fglasgow-exts
Prelude> -- test for contexts on existential types crashing the interpreter