Perhaps #10317 is related? https://ghc.haskell.org/trac/ghc/ticket/10317
You might try building with the latest ghc-7.10 branch. On Wed, Jun 3, 2015 at 12:27 AM, Evan Laforge <qdun...@gmail.com> wrote: > On Tue, Jun 2, 2015 at 7:20 PM, Carter Schonwald > <carter.schonw...@gmail.com> wrote: >> could you share a minimal program that reproduces the problem? > > That's the thing, it's a thousand line shakefile that builds a 100k > line program, and it's happening only rarely now. Since it happens so > rarely it seems really difficult to prune away bits to see if it still > happens. I suppose since the building is all just running commands, > the source it's building doesn't matter, but since it's a build, it > runs a different sequence of commands every time. I suppose I could > "stub out" the program by replacing ghc with a shell script that > sleeps and touches the output files, but it feels like I could spend > days on it because there are tons of little details. > > I'm pretty sure it's related to the threaded runtime, because it > doesn't happen without -threaded. I could try with -debug, but that > probably turns off -threaded too, so no more problem. Shake is > heavily threaded and nondeterministic. I haven't seen other shake > users report it though. > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/glasgow-haskell-users > -- Regards, Austin Seipp, Haskell Consultant Well-Typed LLP, http://www.well-typed.com/ _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/glasgow-haskell-users
