On 7 April 2010 00:23, Louis Wasserman wrote:
> biggest sources of angst!) Looking at ghc-core, my code appears to
> always give the exception "Oops! Entered absent arg ww_s9eC{v} [lid]
> main:Data.Algebra.Ring.Ring{tc r2tU} c{tv a8Os} [tv]"
> Is this typical? Where should I send this?
This is
I've attached the simplest example of my code that used to compile in
GHC 6.10 now gives the error in GHC 6.12.1:
baddata.hs:33:14:
No instances for (Data Const, Data Var)
arising from the 'deriving' clause of a data type declaration
at baddata.hs:33:14-17
Possible
