Test Trac #7205

2 files changed, 17 insertions, 1 deletions

diff --git a/testsuite/tests/gadt/T7205.hs b/testsuite/tests/gadt/T7205.hs
new file mode 100644
index 0000000000..e8c555972f
--- /dev/null
+++ b/testsuite/tests/gadt/T7205.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE GADTs, MultiParamTypeClasses, FlexibleInstances, FlexibleContexts #-}
+module T7205 where
+
+data Abs env g v where
+  Abs :: g (a, env) h v -> Abs env (g (a, env) h v) (a -> v)
+
+class Eval g env h v where
+  eval :: env -> g env h v -> v
+
+evalAbs :: Eval g2 (a2, env) h2 v2 
+   	=> env 
+   	-> Abs env (g2 (a2, env) h2 v2) (a2->v2) 
+   	-> (a2->v2)
+evalAbs env (Abs e) x 
+  = eval (x, env) e    -- e :: g (a,env) h v
diff --git a/testsuite/tests/gadt/all.T b/testsuite/tests/gadt/all.T
index 2d1f00f5a0..ac560219a5 100644
--- a/testsuite/tests/gadt/all.T
+++ b/testsuite/tests/gadt/all.T
@@ -112,4 +112,5 @@ test('T5424',
      multimod_compile,
      ['T5424', '-v0 -O0'])
 
-test('FloatEq', normal, compile, [''])
\ No newline at end of file
+test('FloatEq', normal, compile, [''])
+test('T7205', normal, compile, [''])