From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Philipp Stephani Newsgroups: gmane.emacs.bugs Subject: bug#33547: 27.0.50; Emacs stuck in infinite loop in garbage collection Date: Thu, 29 Nov 2018 17:53:02 +0100 Message-ID: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1543510337 16833 195.159.176.226 (29 Nov 2018 16:52:17 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 29 Nov 2018 16:52:17 +0000 (UTC) To: 33547@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Nov 29 17:52:13 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gSPXr-00046O-HL for geb-bug-gnu-emacs@m.gmane.org; Thu, 29 Nov 2018 17:52:07 +0100 Original-Received: from localhost ([::1]:55251 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gSPZx-00051b-Pm for geb-bug-gnu-emacs@m.gmane.org; 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X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:152896 Archived-At: I didn't manage to reproduce this issue yet, but it seems that Emacs 26.2 can get stuck in an infinite loop in garbage collection: (gdb) bt #0 0x000000000050992c in mark_kboards () at keyboard.c:12020 #1 0x0000000000555f55 in garbage_collect_1 (end=3D) at allo= c.c:5987 #2 0x0000000000555f55 in Fgarbage_collect () at alloc.c:6159 #3 0x000000000056e5e4 in maybe_gc () at lisp.h:4751 #4 0x000000000056e5e4 in Ffuncall (nargs=3D2, args=3Dargs@entry=3D0x7ffd3b= 9fbbb0) at eval.c:2809 #5 0x00000000005a95b0 in exec_byte_code (bytestr=3D, vector= =3D, maxdepth=3D, args_template=3D, nargs=3Dnargs@entry=3D140725603777472, args=3D,=20 args@entry=3D0x17ffd3b9fbdd0) at bytecode.c:630 #6 0x0000000000571041 in funcall_lambda (fun=3DXIL(0x7ffd3b9fbbb0), nargs= =3D140725603777472, nargs@entry=3D0, arg_vector=3D0x17ffd3b9fbdd0, arg_vect= or@entry=3D0x7ffd3b9fbdd0) at eval.c:3028 #7 0x000000000056e6eb in Ffuncall (nargs=3Dnargs@entry=3D1, args=3Dargs@en= try=3D0x7ffd3b9fbdc8) at eval.c:2841 #8 0x000000000056e808 in call0 (fn=3D, fn@entry=3DXIL(0x7b3= 0)) at eval.c:2670 #9 0x000000000050488b in read_char (commandflag=3Dcommandflag@entry=3D1, m= ap=3Dmap@entry=3DXIL(0xaa1e353), prev_event=3DXIL(0), used_mouse_menu=3Duse= d_mouse_menu@entry=3D0x7ffd3b9fc44b, end_time=3Dend_time@entry=3D0x0) at keyboard.c:2619 #10 0x000000000050554c in read_key_sequence (keybuf=3Dkeybuf@entry=3D0x7ffd3b9fc540, prompt=3Dprompt@entry=3DXIL(0)= , dont_downcase_last=3Ddont_downcase_last@entry=3Dfalse, can_return_switch_= frame=3Dcan_return_switch_frame@entry=3Dtrue, fix_current_buffer=3Dfix_curr= ent_buffer@entry=3Dtrue, prevent_redisplay=3Dprevent_redisplay@entry=3Dfals= e, bufsize=3D30) at keyboard.c:9148 #11 0x0000000000506f84 in command_loop_1 () at keyboard.c:1368 #12 0x000000000056d91e in internal_condition_case (bfun=3Dbfun@entry=3D0x50= 6d60 , handlers=3Dhandlers@entry=3DXIL(0x53d0), hfun=3Dhfun= @entry=3D0x4fdaa0 ) at eval.c:1336 #13 0x00000000004f86b4 in command_loop_2 (ignore=3Dignore@entry=3DXIL(0)) a= t keyboard.c:1110 #14 0x000000000056d88d in internal_catch (tag=3Dtag@entry=3DXIL(0xccc0), fu= nc=3Dfunc@entry=3D0x4f8690 , arg=3Darg@entry=3DXIL(0)) at e= val.c:1101 #15 0x00000000004f864b in command_loop () at keyboard.c:1089 #16 0x00000000004fd6b3 in recursive_edit_1 () at keyboard.c:695 #17 0x00000000004fd9ce in Frecursive_edit () at keyboard.c:766 #18 0x000000000041afc3 in main (argc=3D, argv=3D0x7ffd3b9fc8= e8) at emacs.c:1751 Lisp Backtrace: "Automatic GC" (0x0) "vector" (0x3b9fbbb8) "internal-echo-keystrokes-prefix" (0x3b9fbdd0) In this situation, Emacs never leaves mark_kboards. The variables here are: (gdb) p &kbd_buffer $7 =3D (union buffered_input_event (*)[4096]) 0x9a23e0 (gdb) p ((union buffered_input_event*)kbd_buffer + 4096) $9 =3D (union buffered_input_event *) 0x9da3e0 (gdb) p kbd_fetch_ptr $4 =3D (union buffered_input_event *) 0x9d9340 (gdb) p kbd_store_ptr $5 =3D (union buffered_input_event * volatile) 0x9a23e0 (gdb) p event $6 =3D (union buffered_input_event *) 0x9ad078 The loop starts with for (event =3D kbd_fetch_ptr; event !=3D kbd_store_ptr; event++) { if (event =3D=3D kbd_buffer + KBD_BUFFER_SIZE) event =3D kbd_buffer; This seems suspicious given that kbd_fetch_ptr > kbd_store_ptr. It seems like this loop can never terminate, but I don't know how we got into that situation. (gdb) bt full #0 0x000000000050992c in mark_kboards () at keyboard.c:12020 event =3D 0x9ad078 kb =3D p =3D #1 0x0000000000555f55 in garbage_collect_1 (end=3D) at allo= c.c:5987 nextb =3D i =3D stack_top_variable =3D 0 '\000' message_p =3D false tot_before =3D 0 total =3D {XIL(0), XIL(0x4), XIL(0x7ffd3b9fbd50), XIL(0x5aae61), XI= L(0x73de6d), XIL(0xfffffffffe0a3ba0), XIL(0), XIL(0xb7ed375), XIL(0xc660), = XIL(0)} #2 0x0000000000555f55 in Fgarbage_collect () at alloc.c:6159 #3 0x000000000056e5e4 in maybe_gc () at lisp.h:4751 fun =3D original_fun =3D numargs =3D 1 val =3D count =3D 4 #4 0x000000000056e5e4 in Ffuncall (nargs=3D2, args=3Dargs@entry=3D0x7ffd3b= 9fbbb0) at eval.c:2809 fun =3D original_fun =3D numargs =3D 1 val =3D count =3D 4 #5 0x00000000005a95b0 in exec_byte_code (bytestr=3D, vector= =3D, maxdepth=3D, args_template=3D, nargs=3Dnargs@entry=3D140725603777472, args=3D,=20 args@entry=3D0x17ffd3b9fbdd0) at bytecode.c:630 op =3D type =3D targets =3D=20 {0x5ab9e9 , 0x5a98bd , = 0x5a98b8 , 0x5a98b3 , 0x5a96d8 , 0x5a96d8 , 0x5a987d , 0x5a983d , 0x5aa1e6 , 0= x5aa20c , 0x5aa207 , 0x5aa202 , 0x5a967f , 0x5a9680 , 0x5aa3c0 , 0x5aa1eb , 0x5a= a294 , 0x5aa28f , 0x5aa28a , 0x5aa285 , 0x5a95ca , 0x5a95d0 , 0x5aa261 , 0x5aa26= e , 0x5aa703 , 0x5aa6fe , 0x5aa6f9 , 0x5aa6f4 , 0x5a9638 , 0x5a9640 , 0x5aa228 <= exec_byte_code+3912>, 0x5aa211 , 0x5aa6cb , 0x5aa6c6 , 0x5aa6c1 , = 0x5aa6bc , 0x5a9586 , 0x5a9590 , 0x5aa6e7 , 0x5aa6d0 , 0x5aa693 , 0x5aa68e , 0x5= aa689 , 0x5aa684 , 0x5a9521 , 0x5a9528 , 0x5aa6af , 0x5aa698 , 0x5ab44e , 0x5ab5= d8 , 0x5ab518 , 0x5ab9e9 , 0x5ab9e9 , 0x5ab9e9 , 0x5ab9e9 , 0x5ab9e9 , 0x5ab25= 9 , 0x5ab21a , 0x5ab1d5 , 0x5ab190 , 0x5ab152 , 0x5aa30a , 0x5aa2d1 , 0x5ab125= , 0x5aa34c , 0x5aa299 , 0x5ab0ec , 0x5ab0c3 = , 0x5ab08a , 0x5ab057 , 0x5ab024 = , 0x5aafb9 , 0x5aaf80 , 0x5aaf43 , 0x5aaf1a ,= 0x5aaef1 , 0x5aaeb8 , 0x5aae7f <= exec_byte_code+7071>, 0x5aae46 , 0x5aae09 , 0x5aadd6 , 0x5aada3 , = 0x5aad70 , 0x5aacec , 0x5aacaa , 0x5aac16 , 0x5aabd8 , 0x5aab9a , 0x5aab5c , 0= x5aab1e , 0x5aaaeb , 0x5aaaaa , 0x5aaa77 , 0x5aaa44 , 0x5aaa11 , 0x5aa9de , 0x= 5aa92f , 0x5a9750 , 0x5aa906 , 0x5aa8d8 , 0x5aa853 , 0x5aa810 , 0x5aa7e7 , 0x5= aa7bc , 0x5aa791 , 0x5aa75e , 0x5aa733 , 0x5ab9e9 , 0x5aa708 , 0x5a9f9f , 0x5a= 9f74 , 0x5a9f49 , 0x5a9f1e , 0x5a9ef5 , 0x5a9750 , 0x5ab9e9 , 0x5a9eb6 , 0x5a9= e8d , 0x5a9e64 , 0x5aa003 , 0x5a9fca , 0x5a9b20 , 0x5a9aff , 0x5a9ac6 , 0x5a9a= 8d , 0x5a9a54 , 0x5a9a29 , 0x5a9c9c , 0x5ab9e9 , 0x5aa3fb , 0x5aa632 , 0x5aa38= 4 , 0x5aa5f6 , 0x5aa5c1 , 0x5aa588 , 0x5aa03c , 0x5aa43a , 0x5aa235 , 0x5aa3cd= , 0x5ab4a9 , 0x5ab47b , 0x5ab598 , 0x5ab400 = , 0x5ab3c3 , 0x5ab37d , 0--Type <= RET> for more, q to quit, c to continue without paging--c x5ab30a , 0x5aa660 , 0x5a9c5f , 0x5a9c36 , 0x5a9c0d , 0x5a9be4 , 0x5a9bbb , 0x= 5a9b82 , 0x5a9b49 , 0x5a9d90 , 0x5a9d57 , 0x5a9cfe , 0x5a9cc5 , 0x5a9df2 , 0x5= a9dc9 , 0x5a9e2b , 0x5a99f0 , 0x5a99b8 , 0x5a9980 , 0x5a994d , 0x5aa9ab , 0x5a= a972 , 0x5a9907 , 0x5a98c2 , 0x5ab9e9 , 0x5aa52f , 0x5aa4f8 , 0x5aa4c1 , 0x5aa= 48d , 0x5aa459 , 0x5aafe2 , 0x5aad2e , 0x5aa896 , 0x5a97fc , 0x5a97af , 0x5ab9= e9 , 0x5ab9e9 , 0x5a977e , 0x5aa0cd , 0x5ab9e9 , 0x5ab9e9 , 0x5ab9e9 , 0x5ab9e= 9 , 0x5ab9e9 , 0x5ab9e9 , 0x5ab9e9 , 0x5ab9e9 , 0x5aa09b } const_length =3D bytestr_length =3D vectorp =3D 0x743010 quitcounter =3D 1 '\001' stack_items =3D sa_avail =3D sa_count =3D sa_must_free =3D stack_base =3D stack_lim =3D top =3D 0x7ffd3b9fbbb0 void_stack_lim =3D bytestr_data =3D pc =3D count =3D result =3D #6 0x0000000000571041 in funcall_lambda (fun=3DXIL(0x7ffd3b9fbbb0), nargs= =3D140725603777472, nargs@entry=3D0, arg_vector=3D0x17ffd3b9fbdd0, arg_vect= or@entry=3D0x7ffd3b9fbdd0) at eval.c:3028 val =3D syms_left =3D lexenv =3D i =3D optional =3D rest =3D previous_optional_or_rest =3D #7 0x000000000056e6eb in Ffuncall (nargs=3Dnargs@entry=3D1, args=3Dargs@en= try=3D0x7ffd3b9fbdc8) at eval.c:2841 fun =3D original_fun =3D XIL(0x7b30) numargs =3D 0 val =3D count =3D 3 #8 0x000000000056e808 in call0 (fn=3D, fn@entry=3DXIL(0x7b3= 0)) at eval.c:2670 #9 0x000000000050488b in read_char (commandflag=3Dcommandflag@entry=3D1, m= ap=3Dmap@entry=3DXIL(0xaa1e353), prev_event=3DXIL(0), used_mouse_menu=3Duse= d_mouse_menu@entry=3D0x7ffd3b9fc44b, end_time=3Dend_time@entry=3D0x0) at ke= yboard.c:2619 c =3D jmpcount =3D 3 local_getcjmp =3D {{ __jmpbuf =3D {44149952, 3937684359170571700, 3, 0, 10326792, 0,= 3936423309431456331, -3937681285116542389},=20 __mask_was_saved =3D 0,=20 __saved_mask =3D { __val =3D {93642533, 33264, 59304257, 0, 5655602, 0, 4, 0, 93= 642528, 6, 0, 1, 140725603778848, 59304257, 0, 0} } }} save_jump =3D {{ __jmpbuf =3D {44077824, 0, 65, 140725603770752, -33016736, 5695= 344, -33130304, 65},=20 __mask_was_saved =3D 1000317776,=20 __saved_mask =3D { __val =3D {65, 0, 140725603770782, 140725603770744, 5936560, = 78055685, 4, 48, 96, 1, 210453397508, 0, 0, 472446402651, 0, 0} } }} tem =3D save =3D previous_echo_area_message =3D XIL(0) also_record =3D XIL(0) reread =3D false recorded =3D false polling_stopped_here =3D false orig_kboard =3D 0x3487850 #10 0x000000000050554c in read_key_sequence (keybuf=3Dkeybuf@entry=3D0x7ffd= 3b9fc540, prompt=3Dprompt@entry=3DXIL(0), dont_downcase_last=3Ddont_downcas= e_last@entry=3Dfalse, can_return_switch_frame=3Dcan_return_switch_frame@ent= ry=3Dtrue, fix_current_buffer=3Dfix_current_buffer@entry=3Dtrue, prevent_re= display=3Dprevent_redisplay@entry=3Dfalse, bufsize=3D30) at keyboard.c:9148 interrupted_kboard =3D 0x3487850 interrupted_frame =3D 0x11d6c30 key =3D used_mouse_menu =3D false echo_local_start =3D 0 last_real_key_start =3D 0 keys_local_start =3D 0 new_binding =3D t =3D 0 echo_start =3D 0 keys_start =3D 0 current_binding =3D XIL(0xaa1e353) first_event =3D XIL(0) first_unbound =3D 31 mock_input =3D 0 fkey =3D { parent =3D XIL(0x10d76d3),=20 map =3D XIL(0x10d76d3),=20 start =3D 0,=20 end =3D 0 } keytran =3D { parent =3D XIL(0xa63a93),=20 map =3D XIL(0xa63a93),=20 start =3D 0,=20 end =3D 0 } indec =3D { parent =3D XIL(0x10d7703),=20 map =3D XIL(0x10d7703),=20 start =3D 0,=20 end =3D 0 } shift_translated =3D false delayed_switch_frame =3D XIL(0) original_uppercase =3D XIL(0) original_uppercase_position =3D -1 dummyflag =3D false fake_prefixed_keys =3D XIL(0) #11 0x0000000000506f84 in command_loop_1 () at keyboard.c:1368 cmd =3D keybuf =3D {make_number(80), make_number(52), make_number(98), XIL(= 0x2a09300), XIL(0x3), XIL(0x56e770), XIL(0x1), XIL(0xaa767c3), XIL(0x7ffd3b= 9fc610), XIL(0), XIL(0xaa767c3), XIL(0), XIL(0xffffffffffffffff), XIL(0x571= cf4), XIL(0xfffffffffe063960), XIL(0xaa767c3), XIL(0x678884), XIL(0), XIL(0= ), XIL(0x4a6d53413cc7100), XIL(0x7ffd3b9fc610), XIL(0x4fda7f), XIL(0x7ffd3b= 9fc610), XIL(0), XIL(0), XIL(0x4fdbbf), XIL(0), XIL(0x56e229), XIL(0x5), XI= L(0x7b60)} i =3D prev_modiff =3D 22 prev_buffer =3D 0x386d23a0 #12 0x000000000056d91e in internal_condition_case (bfun=3Dbfun@entry=3D0x50= 6d60 , handlers=3Dhandlers@entry=3DXIL(0x53d0), hfun=3Dhfun= @entry=3D0x4fdaa0 ) at eval.c:1336 val =3D c =3D 0x33412c0 #13 0x00000000004f86b4 in command_loop_2 (ignore=3Dignore@entry=3DXIL(0)) a= t keyboard.c:1110 val =3D XIL(0x99) #14 0x000000000056d88d in internal_catch (tag=3Dtag@entry=3DXIL(0xccc0), fu= nc=3Dfunc@entry=3D0x4f8690 , arg=3Darg@entry=3DXIL(0)) at e= val.c:1101 val =3D c =3D 0x33411a0 #15 0x00000000004f864b in command_loop () at keyboard.c:1089 #16 0x00000000004fd6b3 in recursive_edit_1 () at keyboard.c:695 val =3D #17 0x00000000004fd9ce in Frecursive_edit () at keyboard.c:766 buffer =3D #18 0x000000000041afc3 in main (argc=3D, argv=3D0x7ffd3b9fc8= e8) at emacs.c:1751 stack_bottom_variable =3D 0x7f294f292b4b <__libc_calloc+635> dumping =3D skip_args =3D 0 no_loadup =3D false junk =3D 0x0 dname_arg =3D 0x0 ch_to_dir =3D 0x0 original_pwd =3D disable_aslr =3D rlim =3D { rlim_cur =3D 10022912,=20 rlim_max =3D 18446744073709551615 } sockfd =3D -1 module_assertions =3D Lisp Backtrace: "Automatic GC" (0x0) "vector" (0x3b9fbbb8) "internal-echo-keystrokes-prefix" (0x3b9fbdd0) (gdb) xbacktrace "Automatic GC" (0x0) "vector" (0x3b9fbbb8) "internal-echo-keystrokes-prefix" (0x3b9fbdd0) In GNU Emacs 27.0.50 (build 46, x86_64-pc-linux-gnu, GTK+ Version 3.22.24) of 2018-11-27 Repository revision: e02d375cb6670e2306b9c67d7f6fd2dd1d1b2711 Repository branch: master Windowing system distributor 'The X.Org Foundation', version 11.0.11906000 System Description: Debian GNU/Linux buster/sid Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Source file =E2=80=98/usr/local/google/home/phst/ThirdParty/emacs-master/li= sp/emacs-lisp/bytecomp.el=E2=80=99 newer than byte-compiled file Eager macro-expansion failure: (wrong-number-of-arguments (2 . 2) 4) Configured using: 'configure --without-threads --enable-gcc-warnings=3Dwarn-only --enable-gtk-deprecation-warnings --without-pop --with-mailutils --enable-checking --enable-check-lisp-object-type --with-modules 'CFLAGS=3D-O0 -ggdb3'' Configured features: XPM JPEG TIFF GIF PNG SOUND DBUS GSETTINGS GLIB NOTIFY INOTIFY GNUTLS FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES JSON GMP Important settings: 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 dired dired-loaddefs format-spec rfc822 mml easymenu mml-sec 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 sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils phst pcase ffap thingatpt url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs password-cache json map url-vars subr-x rx gnutls puny seq byte-opt gv bytecomp byte-compile cconv dbus xml cl-loaddefs cl-lib 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 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 108712 8519) (symbols 48 21762 1) (strings 32 32823 2052) (string-bytes 1 893166) (vectors 16 16431) (vector-slots 8 532238 6552) (floats 8 52 65) (intervals 56 221 0) (buffers 992 12)) --=20 Google Germany GmbH Erika-Mann-Stra=C3=9Fe 33 80636 M=C3=BCnchen Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg Gesch=C3=A4ftsf=C3=BChrer: Paul Manicle, Halimah DeLaine Prado If you received this communication by mistake, please don=E2=80=99t forward= it to anyone else (it may contain confidential or privileged information), please erase all copies of it, including all attachments, and please let the sender know it went to the wrong person. Thanks.