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-rw-r--r--html-test/src/Instances.hs4
1 files changed, 4 insertions, 0 deletions
diff --git a/html-test/src/Instances.hs b/html-test/src/Instances.hs
index 8e237fe7..85c21754 100644
--- a/html-test/src/Instances.hs
+++ b/html-test/src/Instances.hs
@@ -26,9 +26,13 @@ class Foo f => Bar f a where
bar :: f a -> f Bool -> a
bar' :: f (f a) -> f (f (f b))
+ bar0, bar1 :: (f a, f a) -> (f b, f c)
bar = undefined
bar' = undefined
+ bar0 = undefined
+ bar1 = undefined
+
instance Bar Maybe Bool
instance Bar Maybe [a]