1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/gadt/gadt23.hs b/testsuite/tests/gadt/gadt23.hs
new file mode 100644
index 0000000000..95e2710292
--- /dev/null
+++ b/testsuite/tests/gadt/gadt23.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE GADTs #-}
+
+module Main where
+
+import Gadt23_AST
+
+data Foo = Foo { bar :: Int }
+
+convert :: AST a tag -> AST a Foo
+convert t = case t of
+  Var v     -> Tag (Foo 42) $ Var v
+  Tag t e   -> Tag (Foo 42) $ convert e
+
+main = return ()
+