1 files changed, 21 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/GivenOverlapping.hs b/testsuite/tests/typecheck/should_compile/GivenOverlapping.hs
new file mode 100644
index 0000000000..35f4b07962
--- /dev/null
+++ b/testsuite/tests/typecheck/should_compile/GivenOverlapping.hs
@@ -0,0 +1,21 @@
+{-# LANGUAGE FunctionalDependencies, FlexibleContexts #-}
+
+class C a where 
+
+class D a where 
+ dop :: a -> a    
+
+instance C a => D [a] where 
+ dop = undefined
+
+class J a b | a -> b 
+ where j :: a -> b -> () 
+
+instance J Bool Int where 
+ j = undefined
+   
+foo :: D [Int] => ()
+foo = j True (head (dop [undefined]))
+
+main = return ()
+