ghc 7.10.1 hard lock on exit with shake, OS X 10.10

Evan Laforge qdunkan at
Wed Jun 17 06:19:49 UTC 2015

I've been trying the 7.10.2 testing release for the last few days, and
so far no lock-ups.
Maybe that was it!

On Tue, Jun 2, 2015 at 11:29 PM, Austin Seipp <austin at> wrote:
> Perhaps #10317 is related?
> You might try building with the latest ghc-7.10 branch.
> On Wed, Jun 3, 2015 at 12:27 AM, Evan Laforge <qdunkan at> wrote:
>> On Tue, Jun 2, 2015 at 7:20 PM, Carter Schonwald
>> <carter.schonwald at> 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 at
> --
> Regards,
> Austin Seipp, Haskell Consultant
> Well-Typed LLP,

More information about the Glasgow-haskell-users mailing list