GNU logs - #79895, boring messages

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Subject: bug#79895: 31.0.50; big-round test fails with 32-bit configuration
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On the current master branch, the big-round test in
src/floatfns-tests.el fails with a 32-bits configuration:

  ./src/emacs -Q -batch -l test/src/floatfns-tests.el \
  -eval '(ert-run-tests-batch-and-exit "big-round")'


--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Disposition: attachment; filename=f.log
Content-Transfer-Encoding: quoted-printable

Running 1 tests (2025-11-24 20:16:02+0100, selector =E2=80=98"big-round"=E2=
=80=99)
Test big-round backtrace:
  signal(ert-test-failed (((should (=3D (floor 1.7976931348623157e+308 5
  ert-fail(((should (=3D (floor 1.7976931348623157e+308 5e-324) (ash (1-
  (if (unwind-protect (setq value-324 (apply fn-322 args-323)) (setq f
  (let (form-description-326) (if (unwind-protect (setq value-324 (app
  (let ((value-324 'ert-form-evaluation-aborted-325)) (let (form-descr
  (let* ((fn-322 #'=3D) (args-323 (condition-case err (list (floor 1.797
  #f(lambda () [t] (let* ((fn-317 #'=3D) (args-318 (condition-case err .
  #f(compiled-function () #<bytecode -0x11a55857>)()
  handler-bind-1(#f(compiled-function () #<bytecode -0x11a55857>) (t)=20
  ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test
  ert-run-test(#s(ert-test :name big-round :documentation nil :body #f
  ert-run-or-rerun-test(#s(ert--stats :selector "big-round" :tests [..
  ert-run-tests("big-round" #f(compiled-function (event-type &rest eve
  ert-run-tests-batch("big-round")
  ert-run-tests-batch-and-exit("big-round")
  eval((ert-run-tests-batch-and-exit "big-round") t)
  command-line-1(("-l" "test/src/floatfns-tests.el" "-eval" "(ert-run-
  command-line()
  normal-top-level()
Test big-round condition:
    (ert-test-failed
     ((should (=3D (floor 1.7976931348623157e+308 5e-324) (ash ... 2045)))
      :form
      (=3D
       36385714125121573300846800698456749842842774431060269030973563199251=
835202763131874220510446199752578146168959525535975504123660741259730559491=
535919078220069839241298744801305292878640835527930863994674357611588999020=
693594474762898847930291552594690170203187215045688094955660773922576137969=
830342611860225019935582199601121469249223149872466121371567155862303084330=
314602566069416432551333006194774477514260351201969859368060220131234488198=
148976536169638305696900504838830719760875514246216508976803882728582677352=
177004129288847854463084006372981390756344519549931097743963603971632334891=
836831978686870043355177324550146752512
       -536870912)
      :value nil))
   FAILED  1/1  big-round (0.000222 sec) at test/src/floatfns-tests.el:185

Ran 1 tests, 0 results as expected, 1 unexpected (2025-11-24 20:16:02+0100,=
 0.118153 sec)

1 unexpected results:
   FAILED  big-round


--=-=-=
Content-Type: text/plain


The seems to caused by this expression in Fash:

  (stdc_leading_zeros ((EMACS_UINT)(v < 0 ? ~v : v)) - c
   >= EMACS_INT_WIDTH - FIXNUM_BITS + 1)

The left side is never negative because the return type of
stdc_leading_zeros is unsigned int.




In GNU Emacs 31.0.50 (build 2, i686-pc-linux-gnu) of 2025-11-24 built on
 thinkpad
Repository revision: 1f2a161f93c4e192d9dee02319227ed319360f07
Repository branch: master
System Description: Debian GNU/Linux 13 (trixie)

Configured using:
 'configure -C --without-all --without-x --host=i686-linux-gnu
 'CFLAGS=-O2 -g --std=gnu99''

Configured features:
PDUMPER SECCOMP XIM

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Helmut Eller <eller.helmut@HIDDEN>
Subject: bug#79895: Acknowledgement (31.0.50; big-round test fails with
 32-bit configuration)
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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#79895: 31.0.50; big-round test fails with 32-bit configuration
Resent-From: Eli Zaretskii <eliz@HIDDEN>
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Date: Wed, 26 Nov 2025 15:12:01 +0200
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From: Eli Zaretskii <eliz@HIDDEN>
In-Reply-To: <871pln43f9.fsf@HIDDEN> (message from Helmut Eller on Mon, 24
 Nov 2025 20:48:58 +0100)
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merge 79895 79876
thanks

> From: Helmut Eller <eller.helmut@HIDDEN>
> Date: Mon, 24 Nov 2025 20:48:58 +0100
> 
> On the current master branch, the big-round test in
> src/floatfns-tests.el fails with a 32-bits configuration:
> 
>   ./src/emacs -Q -batch -l test/src/floatfns-tests.el \
>   -eval '(ert-run-tests-batch-and-exit "big-round")'
> 
> The seems to caused by this expression in Fash:
> 
>   (stdc_leading_zeros ((EMACS_UINT)(v < 0 ? ~v : v)) - c
>    >= EMACS_INT_WIDTH - FIXNUM_BITS + 1)
> 
> The left side is never negative because the return type of
> stdc_leading_zeros is unsigned int.

Thanks.  This seems to be a duplicate of bug#79876, so I'm merging
them.

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Date: Wed, 26 Nov 2025 15:12:01 +0200
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To: Helmut Eller <eller.helmut@HIDDEN>
In-Reply-To: <871pln43f9.fsf@HIDDEN> (message from Helmut Eller on Mon, 24
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Subject: Re: bug#79895: 31.0.50; big-round test fails with 32-bit configuration
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merge 79895 79876
thanks

> From: Helmut Eller <eller.helmut@HIDDEN>
> Date: Mon, 24 Nov 2025 20:48:58 +0100
> 
> On the current master branch, the big-round test in
> src/floatfns-tests.el fails with a 32-bits configuration:
> 
>   ./src/emacs -Q -batch -l test/src/floatfns-tests.el \
>   -eval '(ert-run-tests-batch-and-exit "big-round")'
> 
> The seems to caused by this expression in Fash:
> 
>   (stdc_leading_zeros ((EMACS_UINT)(v < 0 ? ~v : v)) - c
>    >= EMACS_INT_WIDTH - FIXNUM_BITS + 1)
> 
> The left side is never negative because the return type of
> stdc_leading_zeros is unsigned int.

Thanks.  This seems to be a duplicate of bug#79876, so I'm merging
them.

Last modified: Wed, 26 Nov 2025 13:15:01 UTC

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