[Haskell-cafe] chp-plus doesn't install

[Neil Brown]

Neil Brown wrote:
> Colin Paul Adams wrote:
>> I'm getting these errors (ghc 6.10.4 on Linux x86_64):
>>
>> Building chp-plus-1.1.0...
>> [1 of 9] Compiling Control.Concurrent.CHP.Test ( 
>> Control/Concurrent/CHP/Test.hs, 
>> dist/build/Control/Concurrent/CHP/Test.o )
>> [2 of 9] Compiling Control.Concurrent.CHP.Console ( 
>> Control/Concurrent/CHP/Console.hs, 
>> dist/build/Control/Concurrent/CHP/Console.o )
>> [3 of 9] Compiling Control.Concurrent.CHP.Connect ( 
>> Control/Concurrent/CHP/Connect.hs, 
>> dist/build/Control/Concurrent/CHP/Connect.o )
>>
>> Control/Concurrent/CHP/Connect.hs:146:67:
>>     Couldn't match expected type `ChanOpts a'
>>            against inferred type `ConnectableParam (Chanout a)'
>>     In the first argument of `oneToOneChannel'', namely `o'
>>     In the second argument of `(<$>)', namely `oneToOneChannel' o'
>>     In the first argument of `(>>=)', namely
>>         `((writer &&& reader) <$> oneToOneChannel' o)'
>
> There's no conflict between the two instances, though.  I wonder if 
> making ConnectableParam depend on "l" and "r" would fix it.  I'll look 
> further into this when I get onto a 6.10.4 machine.
That did indeed turn out to be the fix.  That will teach me to release a 
package without remembering to test it on GHC 6.10 first.  I've uploaded 
chp-plus 1.2.0 to Hackage, which should fix this issue (among other 
changes).  So:

cabal update && cabal install chp-plus

Should work now.  Let me know if you have any other troubles.

Thanks,

Neil.