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-- This one elicited a bug in the simplifier
-- that produces a Lint out-of-scope error
module T4345 where
isNull :: IO Bool
isNull = error "urk"
wrapMatchAll :: IO (Maybe ())
wrapMatchAll = do
nsub <- undefined
let loop True = do atEnd <- isNull
return Nothing
loop False = loop False
result <- undefined
loop undefined
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