1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/unboxedsums/unboxedsums11.hs b/testsuite/tests/unboxedsums/unboxedsums11.hs
new file mode 100644
index 0000000000..2cac84767e
--- /dev/null
+++ b/testsuite/tests/unboxedsums/unboxedsums11.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE UnboxedSums, MagicHash #-}
+
+module Main where
+
+type Ty = (# () | () #)
+
+{-# NOINLINE showTy #-}
+showTy :: Ty -> String
+showTy (# _ | #)  = "(# _ | #)"
+showTy (# | () #) = "(# | () #)"
+
+main :: IO ()
+main = do
+  print (showTy (# undefined | #))
+  print (showTy (# | () #))