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diff --git a/testsuite/tests/rename/should_compile/T3943.hs b/testsuite/tests/rename/should_compile/T3943.hs
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+{-# OPTIONS_GHC -Wall #-}
+{-# LANGUAGE ViewPatterns #-}
+
+module T3943 where
+
+-- Note that 'r' is used, in the view pattern
+-- The bug was that 'r' was reported unused
+
+test :: ([a], [a]) -> [a]
+test x = let (r,(r++) -> rs) = x in rs