GHC 7.2.2 RC 1

[Nathan Howell]

We're hitting something that looks similar with a Chan on 7.2.1, though
they might be related..

On Fri, Nov 11, 2011 at 4:52 AM, Simon Marlow <marlowsd at gmail.com> wrote:

> Sorry, no.  That one has a workaround: define your own fixIO:
>
> fixIO :: (a -> IO a) -> IO a
> fixIO k = do
>    m <- newEmptyMVar
>    ans <- unsafeInterleaveIO (takeMVar m)
>    result <- k ans
>    putMVar m result
>    return result
>
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