GHC HEAD (Quickest) segfaults during compilation of optparse-applicative

[Csaba Hruska]

OK,
I'll submit an issue on gitlab.

On Tue, Mar 10, 2020 at 1:19 PM Ömer Sinan Ağacan <omeragacan at gmail.com>
wrote:

> Can you file a bug report please with reproduction instructions? I know of
> one
> heap corruption bug (#17785, I'm currently debugging it) but it's
> impossible to
> tell whether this is the same bug or not just by looking at your
> screenshot.
>
> In practice whether they're the same bug or not is quote hard to answer,
> and it
> also does not matter too much, for several reasons:
>
> - Segfaults/heap corruption usually happens as a result of interaction of
> many
>   different features and code so usually it's impossible to tell, just by
>   looking at the reproducer, what is responsible.
>
> - It's usually a good idea to debug different reproducers at the same
> time. If
>   they're caused by the same problem then one of the reproducer may lead
> to the
>   bug faster/easier than others so it's a good idea to explore them in
> parallel.
>
>   If they're caused by different bugs then exploring all in parallel does
> not
>   cause any extra work (unless you're context switching at a high rate,
> which I
>   usually avoid).
>
> - More reproducers = more tests, which are good.
>
> Also, when you ask whether this is a known bug on the mailing list it's
> effectively the same as just submitting a bug report: either way you don't
> search it yourself and ask for other devs to do it.
>
> Thanks,
>
> Ömer
>
> Csaba Hruska <csaba.hruska at gmail.com>, 10 Mar 2020 Sal, 15:08
> tarihinde şunu yazdı:
> >
> > I've created a bug sample project on github:
> https://github.com/csabahruska/ghc-bug-sample
> > Follow the readme to reproduce the bug.
> >
> > Cheers,
> > Csaba
> >
> > On Tue, Mar 10, 2020 at 12:31 PM Csaba Hruska <csaba.hruska at gmail.com>
> wrote:
> >>
> >> Hello,
> >>
> >> GHC HEAD (9668781a36941e7552fcec38f6d4e1d5ec3ef6d1) compiled with the
> Quickest flavour segfaults when compiles optparse-applicative-0.15.1.0.
> >> But it compiles fine with the Quick or the default flavours.
> >>
> >> Everything compiles fine (with vanilla Quickest GHC HEAD) until the
> Options.Applicative.Help.Core module where GHC segfaults. (as I understand
> the error code)
> >>
> >> Is this a known bug?
> >> If not then I'll submit an issue.
> >>
> >> Thanks,
> >> Csaba
> >
> > _______________________________________________
> > ghc-devs mailing list
> > ghc-devs at haskell.org
> > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>
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