Commit dc132ed6 authored by Simon Peyton Jones's avatar Simon Peyton Jones
Browse files

Test Trac #5686

parent 76f2fa96
{-# LANGUAGE TypeFamilies, DeriveFunctor #-}
module Main where
data U a = U (G a) deriving Functor
class A a where
type G a
Can't make a derived instance of `Functor U':
Constructor `U' must use the type variable only as the last argument of a data type
In the data type declaration for `U'
......@@ -34,4 +34,5 @@ test('T3834', normal, compile_fail, [''])
test('T4528', normal, compile_fail, [''])
test('T5287', normal, compile_fail, [''])
test('T5478', normal, compile_fail, [''])
test('T5686', normal, compile_fail, [''])
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