Add another test for #1133

testsuite/tests/deriving/should_fail/Makefile

@@ -6,3 +6,8 @@ drvfail016:
 	$(RM) -f drvfail016.hi-boot drvfail016.o-boot
 	'$(TEST_HC)' $(TEST_HC_OPTS) -XGeneralizedNewtypeDeriving -c drvfail016.hs-boot; echo $$?
 
+.PHONY: T1133A
+T1133A:
+	$(TEST_HC) $(TEST_HC_OPTS) -c T1133A.hs-boot
+	-$(TEST_HC) $(TEST_HC_OPTS) -c T1133A.hs
+

testsuite/tests/deriving/should_fail/T1133A.hs

+
+module T1133A where
+
+import {-# SOURCE #-} T1133A
+
+newtype X = X Int deriving Enum

testsuite/tests/deriving/should_fail/T1133A.hs-boot

+
+module T1133A where
+
+newtype X = X Int

testsuite/tests/deriving/should_fail/T1133A.stderr

+
+T1133A.hs:6:28:
+    Can't make a derived instance of `Enum X':
+      `X' must be an enumeration type
+      (an enumeration consists of one or more nullary, non-GADT constructors)
+      Try -XGeneralizedNewtypeDeriving for GHC's newtype-deriving extension
+    In the newtype declaration for `X'

testsuite/tests/deriving/should_fail/all.T

@@ -36,4 +36,7 @@ test('T5287', normal, compile_fail, [''])
 test('T5478', normal, compile_fail, [''])
 test('T5686', normal, compile_fail, [''])
 test('T5922', normal, compile_fail, [''])
-
+test('T1133A',
+     extra_clean(['T1133A.o-boot', 'T1133A.hi-boot']),
+     run_command,
+     ['$MAKE --no-print-directory -s T1133A'])