GHC 7.2.2 RC 1

[Leon Smith]

Chans are basically linked lists with the next pointer wrapped in an
MVar.   The source is actually very readable.   So yes,  it probably
is the same thing.

Best,
Leon

On Fri, Nov 11, 2011 at 11:37 AM, Nathan Howell
<nathan.d.howell at gmail.com> wrote:
> 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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