GNU bug report logs - #31362
stack overflow in GC when creating large nested object

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Mattias Engdegård <mattiase <at> acm.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#31362: closed (stack overflow in GC when creating large
 nested object)
Date: Mon, 04 Apr 2022 17:25:01 +0000

[Message part 1 (text/plain, inline)]

Your message dated Mon, 4 Apr 2022 19:24:06 +0200
with message-id <9CD1BE2B-FBAA-4D3B-9E10-92A0458E0A63 <at> acm.org>
and subject line GC stack overflow fixed
has caused the debbugs.gnu.org bug report #31362,
regarding stack overflow in GC when creating large nested object
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
31362: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31362
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Tino Calancha <tino.calancha <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; Crash after eval a form
Date: Fri, 04 May 2018 16:51:56 +0900

X-Debbugs-CC: Paul Eggert <eggert <at> cs.ucla.edu>, Stefan Monnier <monnier <at> iro.umontreal.ca>

emacs -Q
;; Emacs crash after evaluate the following form:
(let* ((lst (list 'x))
       (form (cons 'die
                   (list 'w '(pop lst)))))
  (while lst
    (setq form
          (cons 'die
                (cons form
                      (list '(pop lst))))))
  form)

;; Same behavior in Emacs 25, 26 and master.
;; The crash seems to happen because of the following assert (lisp.h:1468) fails:
INLINE ptrdiff_t
SCHARS (Lisp_Object string)
{
  ptrdiff_t nchars = XSTRING (string)->u.s.size;
  eassume (0 <= nchars);
  return nchars;
}

In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2017-09-12 on hullmann, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11902000
System Description:	Debian GNU/Linux 9.4 (stretch)

Configured using:
 `configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp
 --without-gnutls --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp
 --without-gnutls --with-x=yes --with-x-toolkit=gtk3
 --with-toolkit-scroll-bars 'CFLAGS=-g -O2
 -fdebug-prefix-map=/build/emacs24-24.5+1=. -fstack-protector-strong
 -Wformat -Werror=format-security -Wall -fno-PIE' 'CPPFLAGS=-Wdate-time
 -D_FORTIFY_SOURCE=2' 'LDFLAGS=-Wl,-z,relro -no-pie''

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util help-fns mail-prsvr mail-utils time-date tooltip electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list newcomment lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
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minibuffer nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
dbusbind gfilenotify dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)

Memory information:
((conses 16 71508 4550)
 (symbols 48 17556 0)
 (miscs 40 38 88)
 (strings 32 9162 4602)
 (string-bytes 1 250704)
 (vectors 16 8910)
 (vector-slots 8 383182 18774)
 (floats 8 63 238)
 (intervals 56 244 4)
 (buffers 960 12))

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From: Mattias Engdegård <mattiase <at> acm.org>
To: 31362-done <at> debbugs.gnu.org, 46900-done <at> debbugs.gnu.org
Cc: Noam Postavsky <npostavs <at> gmail.com>, Pip Cet <pipcet <at> gmail.com>,
 Tino Calancha <tino.calancha <at> gmail.com>
Subject: GC stack overflow fixed
Date: Mon, 4 Apr 2022 19:24:06 +0200

Now that bug#54698 is resolved, we can close bug#31362 and bug#46900 which seem to have been about that, essentially.

If that didn't do it for you, please let us know.

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