Or [1]. The tl;dr: add "where rnf x = seq x ()" to the instance to get the old behavior.
Erik [1] https://ghc.haskell.org/trac/ghc/wiki/Migration/7.10#deepseq-1.4.0.0 On Tue, Feb 17, 2015 at 2:39 PM, Roman Cheplyaka <r...@ro-che.info> wrote: > See http://bit.ly/1CDVOIZ > > On 17/02/15 15:19, Jan Stolarek wrote: >> Devs, >> >> I'm not sure if this is the best place to ask this question but I'm almost >> certain someone here >> will have the answer. I want to build upstream master branch of vector >> library using GHC HEAD and >> cabal 1.22. Alas my attempts have failed: >> >> $ git clone g...@github.com:haskell/vector.git >> $ cd vector >> $ cabal sandbox init >> $ cabal install -w /dane/projekty/ghc/build/inplace/bin/ghc-stage2 >> Resolving dependencies... >> cabal: Could not resolve dependencies: >> trying: vector-0.11.0.0 (user goal) >> trying: base-4.8.0.0/installed-inp... (dependency of vector-0.11.0.0) >> next goal: deepseq (dependency of vector-0.11.0.0) >> rejecting: deepseq-1.4.0.0/installed-inp..., 1.4.0.0 (conflict: vector => >> deepseq>=1.1 && <1.4) >> rejecting: deepseq-1.3.0.2 (conflict: base==4.8.0.0/installed-inp..., deepseq >> => base>=4.3 && <4.8) >> trying: deepseq-1.3.0.1 >> next goal: array (dependency of deepseq-1.3.0.1) >> rejecting: array-0.5.0.1/installed-inp..., 0.5.0.0 (conflict: deepseq => >> array>=0.1 && <0.5) >> rejecting: array-0.4.0.1 (conflict: base==4.8.0.0/installed-inp..., array => >> base>=4.2 && <4.7) >> rejecting: array-0.4.0.0 (conflict: base==4.8.0.0/installed-inp..., array => >> base>=4.2 && <4.6) >> rejecting: array-0.3.0.3 (conflict: base==4.8.0.0/installed-inp..., array => >> base>=4.2 && <4.5) >> rejecting: array-0.3.0.2, 0.3.0.1 (conflict: base==4.8.0.0/installed-inp..., >> array => base>=4.2 && <4.4) >> rejecting: array-0.3.0.0 (conflict: base==4.8.0.0/installed-inp..., array => >> base>=3 && <4.4) >> rejecting: array-0.2.0.0, 0.1.0.0 (conflict: base==4.8.0.0/installed-inp..., >> array => base<4.3) >> Dependency tree exhaustively searched. >> >> The problem arises from vector requiring deepseq < 1.4 when intree package >> db contains deepseq >> 1.4. Removing the upper bound on deepseq in vector.cabal allows to resolve >> dependencies but ends >> with a build error: >> >> Data/Vector/Primitive/Mutable.hs:78:10: >> No instance for (GHC.Generics.Generic (MVector s a)) >> arising from a use of ‘Control.DeepSeq.$gdmrnf’ >> In the expression: Control.DeepSeq.$gdmrnf >> In an equation for ‘rnf’: rnf = Control.DeepSeq.$gdmrnf >> In the instance declaration for ‘NFData (MVector s a)’ >> >> Fixing this error (importing GHC.Generics & deriving `Generic` instance for >> `MVector s a`) leads >> to another one: >> >> Data/Vector/Primitive/Mutable.hs:80:10: >> No instance for (Control.DeepSeq.GNFData (Rep (MVector s a))) >> arising from a use of ‘Control.DeepSeq.$gdmrnf’ >> In the expression: Control.DeepSeq.$gdmrnf >> In an equation for ‘rnf’: rnf = Control.DeepSeq.$gdmrnf >> In the instance declaration for ‘NFData (MVector s a)’ >> >> This time I have no idea how to fix it since GNFData is an internal class of >> Control.Deepseq >> module. Help? >> >> Aside: at first I thought vector is one of the boot libraries since it is >> kept in the source tree. >> But then I realized it is not being build during bootstrapping. Why do we >> keep it in the source >> tree then? >> >> Janek >> >> --- >> Politechnika Łódzka >> Lodz University of Technology >> >> Treść tej wiadomości zawiera informacje przeznaczone tylko dla adresata. >> Jeżeli nie jesteście Państwo jej adresatem, bądź otrzymaliście ją przez >> pomyłkę >> prosimy o powiadomienie o tym nadawcy oraz trwałe jej usunięcie. >> >> This email contains information intended solely for the use of the >> individual to whom it is addressed. >> If you are not the intended recipient or if you have received this message >> in error, >> please notify the sender and delete it from your system. >> _______________________________________________ >> ghc-devs mailing list >> ghc-devs@haskell.org >> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >> > > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs