until -package:numeric-prelude -package:language-bash -package:clash-prelude -package:mixed-types-num -package:netwire -package:elerea -package:linear-base -package:free -package:scalpel -package:scalpel-core package:dunai
Similar to Yampa's delayed switching. Loses a b in case of an
exception.
Run the first
msf until the second one produces
True
from the output of the first.