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-- This one triggers the bug reported in Trac #1092
-- The problem is that the rule
-- forall w. f (\v->w) = w
-- erroneously matches the call
-- f id
--
-- Lint catches the error
module Foo where
f :: (Int -> Int) -> Int
{-# NOINLINE f #-}
f g = g 4
{-# RULES
"f" forall w. f (\v->w) = w
#-}
h = f id
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