Am 08.01.2012 04:39, schrieb Bogdan Opanchuk:
Hello,
Consider the following code:
{-# LANGUAGE MultiParamTypeClasses, FlexibleInstances, OverlappingInstances,
UndecidableInstances, FunctionalDependencies #-}
We have also such (cruel) code using these extension.
t4.hs:17:31:
Context reduction stack overflow; size = 21
Use -fcontext-stack=N to increase stack size to N
Our code compiles with ghc-7-0.4 if we add -fcontext-stack=31 to the ghc
command line.
Does your code compile with an increased (try 100) context-stack?
[..]
So, the question is, could anyone please tell me, is what I am trying
to do actually correct, and what was changed from 7.0.4 to 7.2.2 to
make it work?
I cannot answer this, but our code also compiles with ghc-7.2.2 using a
lower context-stack (of 26).
HTH Christian
Thank you in advance.
Best regards,
Bogdan
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