Test Trac #8534

testsuite/tests/polykinds/T8534.hs

+{-# LANGUAGE DeriveFunctor, PolyKinds #-}
+module T8534 where
+data A a = A deriving Functor

testsuite/tests/polykinds/all.T

@@ -93,3 +93,4 @@ test('T8132', normal, compile_fail, [''])
 test('T8359', normal, compile, [''])
 test('T8391', normal, compile, [''])
 test('T8449', normal, run_command, ['$MAKE -s --no-print-directory T8449'])
+test('T8534', normal, compile, [''])