Great, with me compiled with ghc -threaded the bug shows up. However, runnning "main" in ghci doesn't show the bug (it finishes correctly). I have GHC 7.4.1.
Corentin On Tue, Dec 25, 2012 at 3:34 PM, <timothyho...@seznam.cz> wrote: > This seems like a bug in GHC. But it has nothing to do with MVars. I've > narrowed this down and filed a bug report here: > > http://hackage.haskell.org/trac/ghc/ticket/7528 > > Timothy > > ---------- Původní zpráva ---------- > Od: Yuras Shumovich <shumovi...@gmail.com> > > Datum: 24. 12. 2012 > Předmět: Re: [Haskell-cafe] multi-thread and lazy evaluation > > > On Mon, 2012-12-24 at 16:16 +0100, timothyho...@seznam.cz wrote: > > The real question is, does this mean that GHC is stopping the world > every > > time it puts an MVar? > > No, GHC rts only locks the MVar itself. > See here: > http://hackage.haskell.org/trac/ghc/browser/rts/PrimOps.cmm#L1358 > > Yuras > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >
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