1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/indexed-types/should_compile/GADT7.hs b/testsuite/tests/indexed-types/should_compile/GADT7.hs
new file mode 100644
index 0000000000..00912605b4
--- /dev/null
+++ b/testsuite/tests/indexed-types/should_compile/GADT7.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE TypeFamilies, GADTs #-}
+
+module GADT7 where
+
+data Pair p  where
+  Pair :: p~(a,b) => a -> b -> Pair p
+  -- this works:
+--  Pair :: a -> b -> Pair (a,b)
+
+foo :: a
+foo = case Pair () () of
+   -- this works:
+--   case Pair () () :: Pair ((), ()) of
+        Pair x y -> undefined
+