On 25.01.2011, at 18:37, Bjorn Buckwalter wrote: > (I > suspect the type inferencer is looping), but maybe you've figured out > something workable for you already.
I told you I'm exhausted right now, didn't I? :) This is definitely not type inferencer. The bug causes compiled program looping. And I have at least one case when let-trick fixes the behavior in compiled program. Pavel. > > Thanks, > Bjorn > > (Sorry for the re-repost, Pavel, my incompetence is matched only by my > perseverance.) > > > On Tue, Jan 25, 2011 at 22:02, Pavel Perikov <peri...@gmail.com> wrote: >> in ghci: >> Prelude> import Numeric.Units.Dimensional.Prelude as D >> Prelude Numeric.Units.Dimensional.Prelude> D.sqrt $ let s = 9 *~ (meter D.* >> meter) in s >> 3.0 m >> Prelude Numeric.Units.Dimensional.Prelude> D.sqrt $ 9 *~ (meter D.* meter) >> ghci hangs. >> complied and optimized code detects <<loop>> and let-trick from the above >> does not help. >> Here's the complete ghci -v session which contains all package versions >> >> ghci -v >> GHCi, version 7.0.1: http://www.haskell.org/ghc/ :? for help >> Glasgow Haskell Compiler, Version 7.0.1, for Haskell 98, stage 2 booted by >> GHC version 6.12.3 >> Using binary package database: >> /Library/Frameworks/GHC.framework/Versions/7.0.1-i386/usr/lib/ghc-7.0.1/package.conf.d/package.cache >> Using binary package database: >> /Users/pavel/.ghc/i386-darwin-7.0.1/package.conf.d/package.cache >> hiding package containers-0.3.0.0 to avoid conflict with later version >> containers-0.4.0.0 >> hiding package QuickCheck-2.3.0.2 to avoid conflict with later version >> QuickCheck-2.4.0.1 >> wired-in package ghc-prim mapped to >> ghc-prim-0.2.0.0-0713122c5f9038c6f0355a37e294e054 >> wired-in package integer-gmp mapped to >> integer-gmp-0.2.0.2-bfb191b8468e4d812a2bb92622cb246e >> wired-in package base mapped to >> base-4.3.0.0-1ea085b64a078bd9d5eaa9d8d525e35e >> wired-in package rts mapped to builtin_rts >> wired-in package template-haskell mapped to >> template-haskell-2.5.0.0-f262af1f92a427f5cf4133bff041044f >> wired-in package dph-seq not found. >> wired-in package dph-par not found. >> Hsc static flags: -static >> Loading package ghc-prim ... linking ... done. >> Loading package integer-gmp ... linking ... done. >> Loading package base ... linking ... done. >> Loading package ffi-1.0 ... linking ... done. >> Prelude> import Numeric.Units.Dimensional.Prelude as D >> hiding package containers-0.3.0.0 to avoid conflict with later version >> containers-0.4.0.0 >> hiding package QuickCheck-2.3.0.2 to avoid conflict with later version >> QuickCheck-2.4.0.1 >> wired-in package ghc-prim mapped to >> ghc-prim-0.2.0.0-0713122c5f9038c6f0355a37e294e054 >> wired-in package integer-gmp mapped to >> integer-gmp-0.2.0.2-bfb191b8468e4d812a2bb92622cb246e >> wired-in package base mapped to >> base-4.3.0.0-1ea085b64a078bd9d5eaa9d8d525e35e >> wired-in package rts mapped to builtin_rts >> wired-in package template-haskell mapped to >> template-haskell-2.5.0.0-f262af1f92a427f5cf4133bff041044f >> wired-in package dph-seq not found. >> wired-in package dph-par not found. >> *** Parser: >> hiding package containers-0.3.0.0 to avoid conflict with later version >> containers-0.4.0.0 >> hiding package QuickCheck-2.3.0.2 to avoid conflict with later version >> QuickCheck-2.4.0.1 >> wired-in package ghc-prim mapped to >> ghc-prim-0.2.0.0-0713122c5f9038c6f0355a37e294e054 >> wired-in package integer-gmp mapped to >> integer-gmp-0.2.0.2-bfb191b8468e4d812a2bb92622cb246e >> wired-in package base mapped to >> base-4.3.0.0-1ea085b64a078bd9d5eaa9d8d525e35e >> wired-in package rts mapped to builtin_rts >> wired-in package template-haskell mapped to >> template-haskell-2.5.0.0-f262af1f92a427f5cf4133bff041044f >> wired-in package dph-seq not found. >> wired-in package dph-par not found. >> Prelude Numeric.Units.Dimensional.Prelude> D.sqrt $ let s = 9 *~ (meter D.* >> meter) in s >> hiding package containers-0.3.0.0 to avoid conflict with later version >> containers-0.4.0.0 >> hiding package QuickCheck-2.3.0.2 to avoid conflict with later version >> QuickCheck-2.4.0.1 >> wired-in package ghc-prim mapped to >> ghc-prim-0.2.0.0-0713122c5f9038c6f0355a37e294e054 >> wired-in package integer-gmp mapped to >> integer-gmp-0.2.0.2-bfb191b8468e4d812a2bb92622cb246e >> wired-in package base mapped to >> base-4.3.0.0-1ea085b64a078bd9d5eaa9d8d525e35e >> wired-in package rts mapped to builtin_rts >> wired-in package template-haskell mapped to >> template-haskell-2.5.0.0-f262af1f92a427f5cf4133bff041044f >> wired-in package dph-seq not found. >> wired-in package dph-par not found. >> *** Parser: >> *** Desugar: >> *** Simplify: >> *** CorePrep: >> *** ByteCodeGen: >> Loading package old-locale-1.0.0.2 ... linking ... done. >> Loading package time-1.2.0.3 ... linking ... done. >> Loading package numtype-1.0 ... linking ... done. >> Loading package dimensional-0.8.0.1 ... linking ... done. >> 3.0 m >> hiding package containers-0.3.0.0 to avoid conflict with later version >> containers-0.4.0.0 >> hiding package QuickCheck-2.3.0.2 to avoid conflict with later version >> QuickCheck-2.4.0.1 >> wired-in package ghc-prim mapped to >> ghc-prim-0.2.0.0-0713122c5f9038c6f0355a37e294e054 >> wired-in package integer-gmp mapped to >> integer-gmp-0.2.0.2-bfb191b8468e4d812a2bb92622cb246e >> wired-in package base mapped to >> base-4.3.0.0-1ea085b64a078bd9d5eaa9d8d525e35e >> wired-in package rts mapped to builtin_rts >> wired-in package template-haskell mapped to >> template-haskell-2.5.0.0-f262af1f92a427f5cf4133bff041044f >> wired-in package dph-seq not found. >> wired-in package dph-par not found. >> Prelude Numeric.Units.Dimensional.Prelude> D.sqrt $ 9 *~ (meter D.* meter) >> hiding package containers-0.3.0.0 to avoid conflict with later version >> containers-0.4.0.0 >> hiding package QuickCheck-2.3.0.2 to avoid conflict with later version >> QuickCheck-2.4.0.1 >> wired-in package ghc-prim mapped to >> ghc-prim-0.2.0.0-0713122c5f9038c6f0355a37e294e054 >> wired-in package integer-gmp mapped to >> integer-gmp-0.2.0.2-bfb191b8468e4d812a2bb92622cb246e >> wired-in package base mapped to >> base-4.3.0.0-1ea085b64a078bd9d5eaa9d8d525e35e >> wired-in package rts mapped to builtin_rts >> wired-in package template-haskell mapped to >> template-haskell-2.5.0.0-f262af1f92a427f5cf4133bff041044f >> wired-in package dph-seq not found. >> wired-in package dph-par not found. >> *** Parser: >> *** Desugar: >> *** Simplify: >> *** CorePrep: >> *** ByteCodeGen: >> HANG! >> >> _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users