Error found:
in module Main
at tests/purs/failing/ProgrammableTypeErrorsTypeString.purs:24:9 - 24:24 (line 24, column 9 - line 24, column 24)

  A custom type error occurred while solving type class constraints:

    Don't want to show MyType Int because.


while solving type class constraint
                             
  Data.Show.Show (MyType Int)
                             
while applying a function show
  of type Show t0 => t0 -> String
  to argument MyType 2
while checking that expression show (MyType 2)
  has type String
in value declaration main

where t0 is an unknown type

See https://github.com/purescript/documentation/blob/master/errors/NoInstanceFound.md for more information,
or to contribute content related to this error.