GHCI :unset -XLanguageExtension returns "don't know how to reverse -XLanguageExtension"
|Reported by:||jfeltz||Owned by:||leroux|
|Type of failure:||None/Unknown||Test Case:||ghci/scripts/T9293|
|Related Tickets:||Differential Rev(s):||Phab:D516|
Any language extension tried appears to not work with :unset. To make matters worse, :unset expands to a number of options, misleading the user into thinking that it should (if that is the case). I eventually had to ask someone on IRC #haskell, leading to the :set -XNoLanguageExtension trick to do what I needed. A fix to :unset is suggested, or removing the misleading/non-working command.