Memory leak caused by nested monadic loops

See this stackoverflow post: http://stackoverflow.com/a/41521876/110081

Basically, the following program leaks memory on ghc 7.10.3 and ghc 8.0.1.

import Control.Monad (forever)

main :: IO ()
main = worker

{-# NOINLINE worker #-}
worker :: (Monad m) => m ()
worker = forever $ poll ()

poll :: (Monad m) => () -> m a
poll action = do
    return ()
    poll action

Could ghc do better there?

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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