1 files changed, 16 insertions, 0 deletions
diff --git a/testsuite/tests/safeHaskell/safeLanguage/SafeLang10_A.hs b/testsuite/tests/safeHaskell/safeLanguage/SafeLang10_A.hs
new file mode 100644
index 0000000000..7be17b5ec0
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+++ b/testsuite/tests/safeHaskell/safeLanguage/SafeLang10_A.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE Trustworthy #-}
+
+-- | Trusted library that unsafe plugins can use
+module SafeLang10_A where
+
+class Pos a where
+    res :: a -> Bool
+
+-- Any call to res with a list in out TCB
+-- should use this method and never a more
+-- specific one provided by an untrusted module
+instance Pos [a] where
+    res _ = True
+
+