Started getting:
ghc-6.2.1.20040313: panic! (the `impossible' happened, GHC version 6.2.1.20040313):
mkTyVar a1 {- tv a75q -}
Please report it as a compiler bug to [EMAIL PROTECTED],
or http://sourceforge.net/projects/ghc/.
today... definitely a but to do with class inference, as it started appearing
aftyer changing some instance constraints and fundeps on classes.
Can't really be a lot more specific as code is big. Let me know if you want
me to produce a small code extract which triggers it.
Regards,
Keean.
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