I can’t reproduce this. With the enclosed module and HEAD, I get the warning; but when I add –fspec-constr-count=5, the warning goes away and I get the specialised rules.
Could Cabal not be passing on the flag or something? Simon module Foo where data T = A | B | C | D | E f :: T -> [Bool] -> T f x ys | and ys = x f A ys = f B ys f B ys = f C ys f C ys = f D ys f D ys = f E ys f E ys = f A ys From: glasgow-haskell-users-boun...@haskell.org [mailto:glasgow-haskell-users-boun...@haskell.org] On Behalf Of Bryan O'Sullivan Sent: 29 August 2010 01:05 To: glasgow-haskell-users@haskell.org Subject: Confusing warnings from GHC HEAD I get a few dozen of these when building the text package, and they weren't present in 6.12 or earlier: SpecConstr Function `$wa1{v X5A2} [lid]' has three call patterns, but the limit is 2 Use -fspec-constr-count=n to set the bound Use -dppr-debug to see specialisations There are a few aspects to this that I find surprising. * I can't do anything with the Core name. * My cabal file contains -fspec-constr-count=5 just to be safe, but it doesn't help. I can't tell whether this is the compiler going a little off into the weeds, or whether I'm doing something wrong, but I appear to be unable to make the message go away. Thanks, Bryan.
_______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
