Resurrecting yarr

[Dominic Steinitz]

I tried the example given here https://ghc.haskell.org/trac/ghc/ticket/9254 which seems related but this is fixed in 7.8.3 so clearly the problem I am tripping over is different.

Dominic Steinitz
dominic at steinitz.org
http://idontgetoutmuch.wordpress.com

On 27 Dec 2014, at 10:16, Dominic Steinitz <dominic at steinitz.org> wrote:

> This seems to be related to
> 
>> https://ghc.haskell.org/trac/ghc/ticket/8425
>> https://ghc.haskell.org/trac/ghc/ticket/7737
>> https://ghc.haskell.org/trac/ghc/ticket/9128
> 
> but these are marked as closed for 7.8.3
> 
> Dominic Steinitz
> dominic at steinitz.org
> http://idontgetoutmuch.wordpress.com
> 
> On 27 Dec 2014, at 09:24, Dominic Steinitz <dominic at steinitz.org> wrote:
> 
>> I am trying to resurrect the yarr package (https://hackage.haskell.org/package/yarr). Thanks to all the very helpful folk in the Haskell community it now compiles under 7.8.3 and the tests run apart from
>> 
>>> ~/Dropbox/Private/yarr/tests $ ./canny 1 50 100 tree.png 
>>> luminosity        8.41 ms,  5.33 tics per index
>>> canny: Oops!  Entered absent arg $dVector1{v a6vi} [lid] Vector{tc rrL}
>>>                          (VecList{tc rrR} (S{tc ruZ} Z{tc ruI}))
>>>                          (VecList{tc rrR}
>>>                             (S{tc ruZ}
>>>                                (S{tc ruZ} (S{tc ruZ} (S{tc ruZ} (S{tc ruZ} Z{tc ruI})))))
>>>                             (Word{(w) tc 32R}
>>>                              -> Word{(w) tc 32R} -> IO{tc 32I} Word{(w) tc 32R}))
>>> canny: thread blocked indefinitely in an MVar operation
>> 
>> Now according to the notes left by the original developer, this used to work under ghc 7.6.1.
>> 
>> What is this message telling me?
>> 
>> Let me know if I should provide more information.
>> 
>> Many thanks
>> 
>> Dominic Steinitz
>> dominic at steinitz.org
>> http://idontgetoutmuch.wordpress.com
>> 
> 

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