[Haskell-cafe] Help! Haskell Platform install broke System.Random.TF

[Jeremy Gibbons]

I've just installed GHC 8.0.1, and it seems that my QuickCheck is now broken. I'm presuming that these two facts are connected.

I have a trivially small QuickCheck example:

> import Test.QuickCheck
> prop_PlusAssociative :: Integer -> Integer -> Integer -> Bool
> prop_PlusAssociative x y z = (x+y)+z == x+(y+z)

This loads fine, but when I try to test the property I get a mysterious error:

jg$ ghci quickcheck.lhs
GHCi, version 7.10.2: http://www.haskell.org/ghc/  :? for help
[1 of 1] Compiling Main             ( quickcheck.lhs, interpreted )
Ok, modules loaded: Main.
*Main> quickCheck prop_PlusAssociative 
can't load .so/.DLL for: /Library/Haskell/ghc-7.10.2-x86_64/lib/tf-random-0.5/libHStf-random-0.5-926BwEbiHzi7pBkp4dTxOe-ghc7.10.2.dylib (dlopen(/Library/Haskell/ghc-7.10.2-x86_64/lib/tf-random-0.5/libHStf-random-0.5-926BwEbiHzi7pBkp4dTxOe-ghc7.10.2.dylib, 5): Library not loaded: @rpath/libHSrandom-1.1-1z8Ujelqc6aKgvPnbRUKkP-ghc7.10.2.dylib
  Referenced from: /Library/Haskell/ghc-7.10.2-x86_64/lib/tf-random-0.5/libHStf-random-0.5-926BwEbiHzi7pBkp4dTxOe-ghc7.10.2.dylib
  Reason: image not found)

I don't think it's anything to do with QuickCheck itself; I get the same error just trying to use the System.Random.TF library directly:

jg$ ghci
GHCi, version 7.10.2: http://www.haskell.org/ghc/  :? for help
Prelude> import System.Random.TF.Gen
Prelude System.Random.TF.Gen> seedTFGen (1,1,1,1)
can't load .so/.DLL for: /Library/Haskell/ghc-7.10.2-x86_64/lib/tf-random-0.5/libHStf-random-0.5-926BwEbiHzi7pBkp4dTxOe-ghc7.10.2.dylib (dlopen(/Library/Haskell/ghc-7.10.2-x86_64/lib/tf-random-0.5/libHStf-random-0.5-926BwEbiHzi7pBkp4dTxOe-ghc7.10.2.dylib, 5): Library not loaded: @rpath/libHSrandom-1.1-1z8Ujelqc6aKgvPnbRUKkP-ghc7.10.2.dylib
  Referenced from: /Library/Haskell/ghc-7.10.2-x86_64/lib/tf-random-0.5/libHStf-random-0.5-926BwEbiHzi7pBkp4dTxOe-ghc7.10.2.dylib
  Reason: image not found)

The "7.10.2" is because I deactivated 8.0.1, then installed 7.10.3, then uninstalled both, then uninstalled all GHCs and deleted /Library/Haskell and reinstalled GHC 7.10.2 (my last working version) from what I hoped would be a clean slate. All to no avail. However, I do appear still to have a ghc-7.4.2, overlooked by uninstall-hs; and that does work fine - apparently not using the same System.Random.TF library.

Can anyone suggest what I'm doing wrong, and more importantly, how to fix it?

Jeremy

Jeremy.Gibbons at cs.ox.ac.uk
Oxford University Department of Computer Science,
Wolfson Building, Parks Road, Oxford OX1 3QD, UK.
+44 1865 283521
http://www.cs.ox.ac.uk/people/jeremy.gibbons/



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