Error found:
in module Main
at tests/purs/failing/OverlappingVars.purs:14:8 - 14:20 (line 14, column 8 - line 14, column 20)

  No type class instance was found for
                                         
    Main.OverlappingVars (Foo String Int)
                                         

while applying a function f
  of type OverlappingVars t0 => t0 -> t0
  to argument (Foo "") 0
while inferring the type of f ((Foo "") 0)
in value declaration test

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.