Error found:
in module Main
at tests/purs/failing/2109-negate.purs:4:5 - 4:7 (line 4, column 5 - line 4, column 7)

  Unknown value negate. You're probably using numeric negation (the unary - operator), which the compiler replaces with calls to the negate function. Please import negate from module Prelude


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