* Building project in /home/travis/build/purescript/purescript-invariant

[1/1 TypesDoNotUnify] src/Data/Functor/Invariant.purs:51:41

  51    imap f _ (Alternate x) = Alternate (f x)

                                              ^

  

  Could not match type

  

    f3 a0

  

  with type

  

    a0

  

  while checking that type t1 t2

    is at least as general as type a0

  while checking that expression x

    has type a0

  in value declaration invariantAlternate

  

  where f3 is a rigid type variable

          bound at (line 0, column 0 - line 0, column 0)

        a0 is a rigid type variable

          bound at (line 0, column 0 - line 0, column 0)

        t1 is an unknown type

        t2 is an unknown type

           Src   Lib   All

Warnings   0     0     0  

Errors     1     0     1  

* ERROR: Subcommand terminated with exit code 1

The command "npm run -s build" exited with 1.
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