Subject: bug#33073: closed (Re: bug#33073: 27.0.50; Fatal error when comparing threads with 'equal')

From: [email-masked] (GNU bug Tracking System)
Date: Fri, 19 Oct 2018 06:38:02 +0000

Your bug report

#33073: 27.0.50; Fatal error when comparing threads with 'equal'

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
33073: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=33073
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#33073: 27.0.50; Fatal error when comparing threads with 'equal'
From: Eli Zaretskii <[email-masked]>
To: Gemini Lasswell <[email-masked]>
Cc: [email-masked]
Date: Fri, 19 Oct 2018 09:37:14 +0300
List-Id: <debbugs-submit.debbugs.gnu.org>

> From: Gemini Lasswell <[email-masked]>
> Cc: [email-masked]
> Date: Thu, 18 Oct 2018 17:23:56 -0700
> 
> Eli Zaretskii <[email-masked]> writes:
> 
> > Thanks, should be fixed now.
> 
> Yes, it's fixed.

Thanks, closing.

Subject: 27.0.50; Fatal error when comparing threads with 'equal'
From: Gemini Lasswell <[email-masked]>
To: [email-masked]
Date: Tue, 16 Oct 2018 21:58:20 -0700
List-Id: <debbugs-submit.debbugs.gnu.org>

When Emacs is configured with assertions, it fails at one when using
'equal' to compare main-thread to another thread.  The configure flags
which I am using are:

   --enable-checking=yes,glyphs --enable-check-lisp-object-type

To reproduce:

>From emacs -Q, enter the following code into *scratch* and
then M-x eval-buffer RET:

(defun my-func () (while t (sleep-for 10)))
(setq my-t (make-thread 'my-func))
(equal main-thread my-t) 

Result:

lisp.h:1548: Emacs fatal error: assertion failed: 0 <= size

Thread 1 "emacs" hit Breakpoint 1, terminate_due_to_signal (sig=sig@entry=6, 
    backtrace_limit=backtrace_limit@entry=2147483647) at emacs.c:369
369	{
(gdb) bt
#0  terminate_due_to_signal (sig=sig@entry=6, 
    backtrace_limit=backtrace_limit@entry=2147483647) at emacs.c:369
#1  0x00000000005a7259 in die (msg=msg@entry=0x678e84 "0 <= size", 
    file=file@entry=0x678da5 "lisp.h", line=line@entry=1548) at alloc.c:7094
#2  0x0000000000536bda in ASIZE (array=...) at lisp.h:1548
#3  0x00000000005dbb18 in internal_equal (o1=XIL(0xd73485), o2=XIL(0x15dfc35), 
    equal_kind=equal_kind@entry=EQUAL_PLAIN, depth=depth@entry=0, ht=..., 
    ht@entry=XIL(0)) at fns.c:2422
#4  0x00000000005dc163 in Fequal (o1=..., o2=...) at fns.c:2314
#5  0x00000000005cd6e6 in eval_sub (form=...) at eval.c:2327
#6  0x00000000005f6d60 in readevalloop_eager_expand_eval (val=..., 
    val@entry=XIL(0x4302393), macroexpand=macroexpand@entry=XIL(0xe3130))
    at lread.c:1903
#7  0x00000000005fd0c5 in readevalloop (
    readcharfun=readcharfun@entry=XIL(0xde3805), infile0=infile0@entry=0x0, 
    sourcename=..., sourcename@entry=XIL(0), printflag=false, unibyte=..., 
    unibyte@entry=XIL(0), readfun=..., readfun@entry=XIL(0), start=XIL(0), 
    end=...) at lread.c:2089
#8  0x00000000005fe749 in Feval_buffer (buffer=..., printflag=XIL(0), 
    filename=XIL(0), unibyte=..., do_allow_print=...) at lread.c:2156
#9  0x00000000005cc5b3 in funcall_subr (subr=0xcd9480 <Seval_buffer>, 
    numargs=numargs@entry=0, args=args@entry=0x7fff2cf3c450) at eval.c:2946
#10 0x00000000005ca771 in Ffuncall (nargs=nargs@entry=1, 
    args=args@entry=0x7fff2cf3c448) at eval.c:2859
#11 0x00000000005c6653 in Ffuncall_interactively (nargs=1, args=0x7fff2cf3c448)
    at callint.c:253
#12 0x00000000005ca771 in Ffuncall (nargs=nargs@entry=2, 
    args=args@entry=0x7fff2cf3c440) at eval.c:2859
#13 0x00000000005c7dd9 in Fcall_interactively (function=..., record_flag=..., 
    keys=...) at callint.c:781
#14 0x00000000005cc5d7 in funcall_subr (subr=0xcd6100 <Scall_interactively>, 
    numargs=numargs@entry=3, args=args@entry=0x7fff2cf3c700) at eval.c:2939
#15 0x00000000005ca771 in Ffuncall (nargs=4, args=args@entry=0x7fff2cf3c6f8)
    at eval.c:2859
#16 0x0000000000611f00 in exec_byte_code (bytestr=..., vector=..., maxdepth=..., 
    args_template=..., nargs=nargs@entry=2, args=<optimized out>, 
    args@entry=0x9c69e8 <pure+820392>) at bytecode.c:632
#17 0x00000000005cde82 in funcall_lambda (fun=XIL(0x7fff2cf3c6f8), 
    nargs=nargs@entry=2, arg_vector=0x9c69e8 <pure+820392>, 
    arg_vector@entry=0x7fff2cf3c9e8) at eval.c:3060
#18 0x00000000005ca65b in Ffuncall (nargs=3, args=args@entry=0x7fff2cf3c9e0)
    at eval.c:2873
#19 0x0000000000611f00 in exec_byte_code (bytestr=..., vector=..., maxdepth=..., 
    args_template=..., nargs=nargs@entry=3, args=<optimized out>, 
    args@entry=0x9c6698 <pure+819544>) at bytecode.c:632
#20 0x00000000005cde82 in funcall_lambda (fun=XIL(0x7fff2cf3c9e0), 
    nargs=nargs@entry=3, arg_vector=0x9c6698 <pure+819544>, 
    arg_vector@entry=0x7fff2cf3cdd0) at eval.c:3060
#21 0x00000000005ca65b in Ffuncall (nargs=nargs@entry=4, 
    args=args@entry=0x7fff2cf3cdc8) at eval.c:2873
#22 0x00000000005c6653 in Ffuncall_interactively (nargs=4, args=0x7fff2cf3cdc8)
    at callint.c:253
#23 0x00000000005ca771 in Ffuncall (nargs=nargs@entry=5, args=0x7fff2cf3cdc0)
    at eval.c:2859
#24 0x00000000005caa3a in Fapply (nargs=nargs@entry=3, 
    args=args@entry=0x7fff2cf3cf70) at eval.c:2479
#25 0x00000000005c6de1 in Fcall_interactively (function=..., record_flag=..., 
    keys=...) at callint.c:340
#26 0x00000000005cc5d7 in funcall_subr (subr=0xcd6100 <Scall_interactively>, 
    numargs=numargs@entry=3, args=args@entry=0x7fff2cf3d100) at eval.c:2939
#27 0x00000000005ca771 in Ffuncall (nargs=4, args=args@entry=0x7fff2cf3d0f8)
    at eval.c:2859
#28 0x0000000000611f00 in exec_byte_code (bytestr=..., vector=..., maxdepth=..., 
    args_template=..., nargs=nargs@entry=1, args=<optimized out>, 
    args@entry=0x9c69e8 <pure+820392>) at bytecode.c:632
#29 0x00000000005cde82 in funcall_lambda (fun=XIL(0x7fff2cf3d0f8), 
    nargs=nargs@entry=1, arg_vector=0x9c69e8 <pure+820392>, 
    arg_vector@entry=0x7fff2cf3d3b8) at eval.c:3060
#30 0x00000000005ca65b in Ffuncall (nargs=nargs@entry=2, 
    args=args@entry=0x7fff2cf3d3b0) at eval.c:2873
#31 0x00000000005ca83a in call1 (fn=..., fn@entry=XIL(0x3ff0), arg1=...)
    at eval.c:2710
#32 0x000000000054f597 in command_loop_1 () at keyboard.c:1451
#33 0x00000000005c975f in internal_condition_case (
    bfun=bfun@entry=0x54f080 <command_loop_1>, handlers=..., 
    handlers@entry=XIL(0x53a0), hfun=hfun@entry=0x541d60 <cmd_error>)
    at eval.c:1373
#34 0x000000000053db88 in command_loop_2 (ignore=..., ignore@entry=XIL(0))
    at keyboard.c:1079
#35 0x00000000005c9683 in internal_catch (tag=..., 
    func=func@entry=0x53db60 <command_loop_2>, arg=..., arg@entry=XIL(0))
    at eval.c:1136
#36 0x000000000053ddeb in command_loop () at keyboard.c:1058
#37 0x0000000000541864 in recursive_edit_1 () at keyboard.c:703
#38 0x0000000000541c23 in Frecursive_edit () at keyboard.c:774
#39 0x000000000041e727 in main (argc=<optimized out>, argv=<optimized out>)
    at emacs.c:1731

Lisp Backtrace:
"equal" (0x2cf3c120)
"eval-buffer" (0x2cf3c450)
"funcall-interactively" (0x2cf3c448)
"call-interactively" (0x2cf3c700)
"command-execute" (0x2cf3c9e8)
"execute-extended-command" (0x2cf3cdd0)
"funcall-interactively" (0x2cf3cdc8)
"call-interactively" (0x2cf3d100)
"command-execute" (0x2cf3d3b8)

(gdb) p main_thread.header
$1 = {
  size = -4611686018091843576
}
(gdb) p all_threads->header
$2 = {
  size = 4611686018763149320
}
(gdb) p/x main_thread.header
$3 = {
  size = 0xc000000014000008
}
(gdb) p/x all_threads->header
$4 = {
  size = 0x4000000014035008
}

In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2018-10-16 built on sockeye
Repository revision: e64065bbbd21b7136a7a4efb4b0f2f39a65905dd
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: NixOS 18.09.git.ad56635 (Jellyfish)

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

Configured using:
 'configure --prefix=/home/gem/src/emacs/master/bin --with-modules
 --with-x-toolkit=gtk3 --with-xft --config-cache
 --enable-checking=yes,glyphs --enable-check-lisp-object-type'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND DBUS GSETTINGS GLIB NOTIFY LIBSELINUX
GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM
MODULES THREADS GMP

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

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-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

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny seq byte-opt gv
bytecomp byte-compile cconv dired dired-loaddefs format-spec rfc822 mml
easymenu mml-sec password-cache epa derived epg epg-config gnus-util
rmail rmail-loaddefs time-date mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs cl-lib sendmail
rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils elec-pair
mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode elisp-mode lisp-mode prog-mode register page menu-bar
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded 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 threads dbusbind
inotify dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 94825 10040)
 (symbols 48 20044 1)
 (strings 32 28460 1827)
 (string-bytes 1 811220)
 (vectors 16 14265)
 (vector-slots 8 504082 12778)
 (floats 8 47 70)
 (intervals 56 213 0)
 (buffers 992 11))