(Periodic) Segmentation faults when using regex-compat-0.92
I am getting periodic (although frequent) segmentation faults when loading the following code into ghci (version 6.13.20100309) and then asking for the value of re_results1:
module Examples.RegExpTest where
import qualified Text.Regex as RE
re = RE.mkRegexWithOpts "^a+" True True re_results1 = RE.matchRegexAll re "aaaab"
Is this a known problem? Are there known work arounds? Kathleen
kathleen.fisher:
I am getting periodic (although frequent) segmentation faults when loading the following code into ghci (version 6.13.20100309) and then asking for the value of re_results1:
module Examples.RegExpTest where
import qualified Text.Regex as RE
re = RE.mkRegexWithOpts "^a+" True True re_results1 = RE.matchRegexAll re "aaaab"
Is this a known problem? Are there known work arounds?
That sounds very scary. There should never be a segfault in code like this. It may point to a compiler bug in the GHC head. I wonder if you can upgrade to regex-compat 0.93.1 ? http://hackage.haskell.org/package/regex-compat Forwarding to the maintainer, Chris Kuklewicz. -- Don
Don's right. If it's reproducible please file a Trac ticket. Simon | -----Original Message----- | From: libraries-bounces@haskell.org [mailto:libraries-bounces@haskell.org] On | Behalf Of Don Stewart | Sent: 13 July 2010 00:36 | To: Kathleen Fisher | Cc: TextRegexLazy@personal.mightyreason.com; libraries@haskell.org | Subject: Re: (Periodic) Segmentation faults when using regex-compat-0.92 | | kathleen.fisher: | > I am getting periodic (although frequent) segmentation faults when loading | the following code into ghci (version 6.13.20100309) and then asking for the | value of re_results1: | > | > > module Examples.RegExpTest where | > > | > > import qualified Text.Regex as RE | > > | > > re = RE.mkRegexWithOpts "^a+" True True | > > re_results1 = RE.matchRegexAll re "aaaab" | > | > Is this a known problem? Are there known work arounds? | | That sounds very scary. There should never be a segfault in code like | this. It may point to a compiler bug in the GHC head. | | I wonder if you can upgrade to regex-compat 0.93.1 ? | | http://hackage.haskell.org/package/regex-compat | | Forwarding to the maintainer, Chris Kuklewicz. | | -- Don | | _______________________________________________ | Libraries mailing list | Libraries@haskell.org | http://www.haskell.org/mailman/listinfo/libraries
I tried this here with regex 0.93.1 and GHC build yesterday, and couldn't reproduce it on either 32 or 64-bit x86. Cheers, Simon On 13/07/2010 08:13, Simon Peyton-Jones wrote:
Don's right. If it's reproducible please file a Trac ticket.
Simon
| -----Original Message----- | From: libraries-bounces@haskell.org [mailto:libraries-bounces@haskell.org] On | Behalf Of Don Stewart | Sent: 13 July 2010 00:36 | To: Kathleen Fisher | Cc: TextRegexLazy@personal.mightyreason.com; libraries@haskell.org | Subject: Re: (Periodic) Segmentation faults when using regex-compat-0.92 | | kathleen.fisher: |> I am getting periodic (although frequent) segmentation faults when loading | the following code into ghci (version 6.13.20100309) and then asking for the | value of re_results1: |> |> > module Examples.RegExpTest where |> > |> > import qualified Text.Regex as RE |> > |> > re = RE.mkRegexWithOpts "^a+" True True |> > re_results1 = RE.matchRegexAll re "aaaab" |> |> Is this a known problem? Are there known work arounds? | | That sounds very scary. There should never be a segfault in code like | this. It may point to a compiler bug in the GHC head. | | I wonder if you can upgrade to regex-compat 0.93.1 ? | | http://hackage.haskell.org/package/regex-compat | | Forwarding to the maintainer, Chris Kuklewicz. | | -- Don | | _______________________________________________ | Libraries mailing list | Libraries@haskell.org | http://www.haskell.org/mailman/listinfo/libraries
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I am able to repeat the bug using regex 0.93.1 and ghci (version 6.13.20100309). I've filed a trac report. In the meantime, any suggestions on what I might do to work around the problem? Is there a way to upgrade to the most recent HEAD version without going through a complete reinstallation (which takes hours)? Kathleen On Jul 13, 2010, at 4:23 AM, Simon Marlow wrote:
I tried this here with regex 0.93.1 and GHC build yesterday, and couldn't reproduce it on either 32 or 64-bit x86.
Cheers, Simon
On 13/07/2010 08:13, Simon Peyton-Jones wrote:
Don's right. If it's reproducible please file a Trac ticket.
Simon
| -----Original Message----- | From: libraries-bounces@haskell.org [mailto:libraries-bounces@haskell.org] On | Behalf Of Don Stewart | Sent: 13 July 2010 00:36 | To: Kathleen Fisher | Cc: TextRegexLazy@personal.mightyreason.com; libraries@haskell.org | Subject: Re: (Periodic) Segmentation faults when using regex-compat-0.92 | | kathleen.fisher: |> I am getting periodic (although frequent) segmentation faults when loading | the following code into ghci (version 6.13.20100309) and then asking for the | value of re_results1: |> |> > module Examples.RegExpTest where |> > |> > import qualified Text.Regex as RE |> > |> > re = RE.mkRegexWithOpts "^a+" True True |> > re_results1 = RE.matchRegexAll re "aaaab" |> |> Is this a known problem? Are there known work arounds? | | That sounds very scary. There should never be a segfault in code like | this. It may point to a compiler bug in the GHC head. | | I wonder if you can upgrade to regex-compat 0.93.1 ? | | http://hackage.haskell.org/package/regex-compat | | Forwarding to the maintainer, Chris Kuklewicz. | | -- Don | | _______________________________________________ | Libraries mailing list | Libraries@haskell.org | http://www.haskell.org/mailman/listinfo/libraries
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It is probably this bug http://hackage.haskell.org/trac/ghc/ticket/4038 which was present for around a couple of months in HEAD, and appeared in GHC 6.12.2 before being fixed in 6.12.3. If you're on Linux or Windows you can download snapshot distributions of GHC from here: http://www.haskell.org/ghc/dist/current/dist/ but I'd recommend 6.12.3 unless you need HEAD for some other reason. Cheers, Simon On 13/07/10 19:27, Kathleen Fisher wrote:
I am able to repeat the bug using regex 0.93.1 and ghci (version 6.13.20100309). I've filed a trac report. In the meantime, any suggestions on what I might do to work around the problem? Is there a way to upgrade to the most recent HEAD version without going through a complete reinstallation (which takes hours)?
Kathleen
On Jul 13, 2010, at 4:23 AM, Simon Marlow wrote:
I tried this here with regex 0.93.1 and GHC build yesterday, and couldn't reproduce it on either 32 or 64-bit x86.
Cheers, Simon
On 13/07/2010 08:13, Simon Peyton-Jones wrote:
Don's right. If it's reproducible please file a Trac ticket.
Simon
| -----Original Message----- | From: libraries-bounces@haskell.org [mailto:libraries-bounces@haskell.org] On | Behalf Of Don Stewart | Sent: 13 July 2010 00:36 | To: Kathleen Fisher | Cc: TextRegexLazy@personal.mightyreason.com; libraries@haskell.org | Subject: Re: (Periodic) Segmentation faults when using regex-compat-0.92 | | kathleen.fisher: |> I am getting periodic (although frequent) segmentation faults when loading | the following code into ghci (version 6.13.20100309) and then asking for the | value of re_results1: |> |> > module Examples.RegExpTest where |> > |> > import qualified Text.Regex as RE |> > |> > re = RE.mkRegexWithOpts "^a+" True True |> > re_results1 = RE.matchRegexAll re "aaaab" |> |> Is this a known problem? Are there known work arounds? | | That sounds very scary. There should never be a segfault in code like | this. It may point to a compiler bug in the GHC head. | | I wonder if you can upgrade to regex-compat 0.93.1 ? | | http://hackage.haskell.org/package/regex-compat | | Forwarding to the maintainer, Chris Kuklewicz. | | -- Don | | _______________________________________________ | Libraries mailing list | Libraries@haskell.org | http://www.haskell.org/mailman/listinfo/libraries
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participants (4)
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Don Stewart -
Kathleen Fisher -
Simon Marlow -
Simon Peyton-Jones