31 Mar
2013
31 Mar
'13
7:13 a.m.
That was it. Thanks! On 03/31/2013 12:30 PM, Brent Yorgey wrote:
On Sun, Mar 31, 2013 at 12:21:48PM +0200, Nathan Hüsken wrote:
No instance for (QuickCheck-2.4.2:Test.QuickCheck.Arbitrary.Arbitrary ValidPos)
The fact that it actually lists the package and version number in the error message strongly suggests that the problem is conflicting versions of the QuickCheck package. Do 'ghc-pkg list QuickCheck' to see if you have multiple versions installed, and unregister all but one of them.
-Brent
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