test Trac #7800

testsuite/tests/deriving/should_fail/T7800.hs

+{-# LANGUAGE StandaloneDeriving, DeriveDataTypeable #-}
+module T7800 where
+
+import T7800a
+import Data.Typeable
+
+deriving instance Typeable A

testsuite/tests/deriving/should_fail/T7800.stderr

+[1 of 2] Compiling T7800a           ( T7800a.hs, T7800a.o )
+[2 of 2] Compiling T7800            ( T7800.hs, T7800.o )
+
+T7800.hs:7:1:
+    To make a Typeable instance of poly-kinded ‛A’, use XPolyKinds
+    In the stand-alone deriving instance for ‛Typeable A’

testsuite/tests/deriving/should_fail/T7800a.hs

+{-# LANGUAGE PolyKinds #-}
+module T7800a where
+
+data A a
\ No newline at end of file

testsuite/tests/deriving/should_fail/all.T

@@ -46,3 +46,4 @@ test('T1496', normal, compile_fail, [''])
 test('T4846', normal, compile_fail, [''])
 test('T7148', normal, compile_fail, [''])
 test('T7148a', normal, compile_fail, [''])
+test('T7800', normal, multimod_compile_fail, ['T7800',''])