From: Paul Eggert <eggert@cs.ucla.edu>
To: Pip Cet <pipcet@gmail.com>
Cc: andrewjmoreton@gmail.com, 32463@debbugs.gnu.org
Subject: bug#32463: 27.0.50; (logior -1) => 4611686018427387903
Date: Sun, 19 Aug 2018 03:59:21 -0700 [thread overview]
Message-ID: <c81bb6fc-edff-3f06-e4ba-9fd18465a585@cs.ucla.edu> (raw)
In-Reply-To: <CAOqdjBd0JdtjPnK2Z=gfd_zD3SiYktwBuVcBPR322zy5NZkPWw@mail.gmail.com>
Pip Cet wrote:
> Even if memory isn't exhausted, creating a bignum larger than 16 GB
> (our most-positive-bignum) results in an immediate crash with external
> libgmp (Linux, x86_64), and that appears not to be easy to fix without
> modifying gmp.
Is there a libgmp bug report for this? or is there a reasonable way to
characterize this arbitrary limitation in libgmp, so that Emacs does not go over
the limit and crash? I've already put in one limit, and we can tighten that
limit (or add more checks) if we know what libgmp's limits are.
> That and left shifts are probably the ones to worry about for now.
> Creating a large bignum by repeated multiplication will require at
> least some intermediate bignums, which need to be allocated and copied
> and thus probably alert the user to something going on.
expt does bignums now too, so that's one more point of failure in this area.
next prev parent reply other threads:[~2018-08-19 10:59 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-17 3:29 bug#32463: 27.0.50; (logior -1) => 4611686018427387903 Katsumi Yamaoka
2018-08-17 5:59 ` Pip Cet
2018-08-17 7:40 ` Katsumi Yamaoka
2018-08-17 9:27 ` Andy Moreton
2018-08-17 11:36 ` Pip Cet
2018-08-17 11:53 ` Pip Cet
2018-08-17 13:27 ` Andy Moreton
2018-08-18 22:43 ` Paul Eggert
2018-08-17 13:24 ` Andy Moreton
2018-08-18 18:48 ` Paul Eggert
2018-08-18 18:59 ` Eli Zaretskii
2018-08-18 19:58 ` Pip Cet
2018-08-18 22:27 ` Paul Eggert
2018-08-19 15:03 ` Eli Zaretskii
2018-08-18 19:59 ` Paul Eggert
2018-08-18 19:45 ` Andy Moreton
2018-08-19 10:43 ` Live System User
2018-08-20 3:02 ` Richard Stallman
2018-08-20 3:47 ` Paul Eggert
2018-08-21 3:37 ` Richard Stallman
2018-08-18 22:56 ` Paul Eggert
2018-08-18 23:17 ` Paul Eggert
2018-08-19 10:34 ` Andy Moreton
2018-08-19 10:48 ` Pip Cet
2018-08-19 10:59 ` Paul Eggert [this message]
2018-08-19 11:32 ` Pip Cet
2018-08-21 9:40 ` Paul Eggert
2018-08-21 10:50 ` Andy Moreton
2018-08-21 14:36 ` Eli Zaretskii
2018-08-21 14:52 ` Andy Moreton
2018-08-21 17:24 ` Paul Eggert
2018-08-19 10:52 ` Paul Eggert
2018-08-22 2:29 ` Paul Eggert
2018-08-22 16:56 ` Tom Tromey
2018-08-22 17:52 ` Paul Eggert
2018-08-22 18:25 ` Eli Zaretskii
2018-08-23 0:28 ` Paul Eggert
2018-08-23 2:39 ` Eli Zaretskii
2018-08-19 18:00 ` Andy Moreton
2018-08-22 2:34 ` Paul Eggert
2018-08-22 23:27 ` Andy Moreton
2018-08-23 14:05 ` Eli Zaretskii
2018-08-22 2:56 ` Paul Eggert
2018-08-22 8:20 ` Andy Moreton
2018-08-22 8:39 ` Andy Moreton
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