Re: PARI/GP 2.17.2 testsuite hangs nondeterministically (macOS)

Bill Allombert on Wed, 01 Jul 2026 00:31:25 +0200

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Re: PARI/GP 2.17.2 testsuite hangs nondeterministically (macOS)

To: pari-users@pari.math.u-bordeaux.fr, Matthias Koeppe <mkoeppe@ucdavis.edu>
Subject: Re: PARI/GP 2.17.2 testsuite hangs nondeterministically (macOS)
From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
Date: Wed, 1 Jul 2026 00:31:21 +0200
References: <CAJ_wo5gerNb2e8uPo9TUseafELpEZz4wgW+9FkoyHdwO5cLgwQ@mail.gmail.com> <aPNXwsHnTyq8_Jwv@seventeen> <CAJ_wo5i1aLVzmFSPi8Pj+PtE2pV4bgecy-U82X5ivHa0U5Gz-A@mail.gmail.com> <CAJ_wo5grW-RTBgB_ewnO-=S2jb+FjLTN94i3GrMnJ-gupiC-Kw@mail.gmail.com> <aTlTjxUTFaZDZj70@seventeen> <aTq5acUHybQwGI_7@seventeen>

On Thu, Dec 11, 2025 at 01:30:35PM +0100, Bill Allombert wrote:
> On Wed, Dec 10, 2025 at 12:03:43PM +0100, Bill Allombert wrote:
> > On Sun, Oct 26, 2025 at 02:21:37PM -0700, Matthias Koeppe wrote:
> > > Unsurprisingly, builds using the clang compilers provided by
> > > conda-forge are also affected.
> > > https://github.com/passagemath/passagemath/actions/runs/18811959899/job/53674549752#step:10:2578
> > 
> > The following stand-alone program that does not use libpari also hangs when run
> > repeatly.
> > 
> > Try for example
> > for i in `seq 1 2000`; do echo $i; ./pthread1; done
> 
> A much smaller test-case.
> So it seems pthread_cancel does not work reliably on MacOS.

I have made a GIT branch bill-e_STOP that try to work around this MacOS bug.

Cheers,
Bill.

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