Error found: in module Main at tests/purs/failing/DeclConflictSynonymClass.purs:8:1 - 8:17 (line 8, column 1 - line 8, column 17) Declaration for type Fail conflicts with an existing type class of the same name. See https://github.com/purescript/documentation/blob/master/errors/DeclConflict.md for more information, or to contribute content related to this error.