Error found:
at tests/purs/failing/Superclasses2.purs:6:1 - 6:23 (line 6, column 1 - line 6, column 23)

  A cycle appears in a set of type class definitions:

    {Bar, Foo}

  Cycles are disallowed because they can lead to loops in the type checker.


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