Warning found:
in module Main
at tests/purs/warning/ShadowedTypeVar.purs:4:1 - 4:44 (line 4, column 1 - line 4, column 44)

  Type variable a was shadowed.

in type declaration for f

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