id summary reporter owner description type status priority milestone component version resolution keywords cc blockedby blocking branch_state votes 3983 SIGBUS, Bus error in __memcmp_avx2_movbe (or __memcmp_sse2) when comparing two dirs(F9,c,c,T) that contain symlink to 0 byte file howaboutsynergy "''' What version of Midnight Commander is used?''' {{{ $ LC_MESSAGES=C mc -V GNU Midnight Commander 4.8.22-130-ge1d11906b Built with GLib 2.60.1 Using the S-Lang library with terminfo database With builtin Editor With subshell support as default With support for background operations With mouse support on xterm With internationalization support With multiple codepages support Virtual File Systems: cpiofs, tarfs, sfs, extfs, ftpfs, sftpfs, fish Data types: char: 8; int: 32; long: 64; void *: 64; size_t: 64; off_t: 64; }}} {{{ $ LC_MESSAGES=C mc -F Home directory: /home/user Profile root directory: /home/user [System data] Config directory: /etc/mc/ Data directory: /usr/share/mc/ File extension handlers: /usr/lib/mc/ext.d/ VFS plugins and scripts: /usr/lib/mc/ extfs.d: /usr/lib/mc/extfs.d/ fish: /usr/lib/mc/fish/ [User data] Config directory: /home/user/.config/mc/ Data directory: /home/user/.local/share/mc/ skins: /home/user/.local/share/mc/skins/ extfs.d: /home/user/.local/share/mc/extfs.d/ fish: /home/user/.local/share/mc/fish/ mcedit macros: /home/user/.local/share/mc/mc.macros mcedit external macros: /home/user/.local/share/mc/mcedit/macros.d/macro.* Cache directory: /home/user/.cache/mc/ }}} {{{ $ mc --configure-options '--prefix=/usr' '--sysconfdir=/etc' '--libexecdir=/usr/lib' '--enable-background' '--enable-network' '--enable-netcode' '--enable-charset' '--enable-nls' '--with-vfs' '--with-edit' '--with-screen=slang' '--without-x' '--without-samba' '--without-gpm-mouse' '--without-gnome' '--with-debug' '--without-included-gettext' '--disable-dependency-tracking' 'CFLAGS=-pipe -march=native -Wno-trigraphs -fno-schedule-insns2 -fno-delete-null-pointer-checks -mtune=native -fomit-frame-pointer -O2 -D_FORTIFY_SOURCE=2 -O2 -fbuiltin -ggdb3' }}} {{{ $ type mc mc is aliased to `. mc-wrapper.sh --nomouse --subshell --stickchars' $ type mc-wrapper.sh mc-wrapper.sh is /home/user/bin/mc-wrapper.sh $ which mc-wrapper.sh /home/user/bin/mc-wrapper.sh $ cat `which mc-wrapper.sh` MC_USER=`id | sed 's/[^(]*(//;s/).*//'` MC_PWD_FILE=""${TMPDIR-/tmp}/mc-$MC_USER/mc.pwd.$$"" /usr/bin/mc -P ""$MC_PWD_FILE"" ""$@"" if test -r ""$MC_PWD_FILE""; then MC_PWD=""`cat ""$MC_PWD_FILE""`"" if test -n ""$MC_PWD"" && test -d ""$MC_PWD""; then cd ""$MC_PWD"" fi unset MC_PWD fi rm -f ""$MC_PWD_FILE"" unset MC_PWD_FILE unset MC_USER }}} {{{ $ coredumpctl -r|head -2 TIME PID UID GID SIG COREFILE EXE Mon 2019-05-06 13:36:45 CEST 13484 1000 1000 7 present /usr/bin/mc }}} Note: below I've redirected the gdb output into /tmp/a file because I don't have scrollback buffer via ssh (and haven't yet figured out how to get one): {{{ $ coredumpctl gdb >/tmp/a GNU gdb (GDB) 8.2.1 Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type ""show copying"" and ""show warranty"" for details. This GDB was configured as ""x86_64-pc-linux-gnu"". Type ""show configuration"" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type ""help"". Type ""apropos word"" to search for commands related to ""word""... Reading symbols from /usr/bin/mc...done. [New LWP 13484] [Thread debugging using libthread_db enabled] Using host libthread_db library ""/usr/lib/libthread_db.so.1"". Core was generated by `/usr/bin/mc -P /tmp/mc-user/mc.pwd.1908 --nomouse --subshell --stickchars'. Program terminated with signal SIGBUS, Bus error. #0 0x00007fcc3acba480 in __memcmp_avx2_movbe () from /usr/lib/libc.so.6 (gdb) bt #0 0x00007fcc3acba480 in __memcmp_avx2_movbe () from /usr/lib/libc.so.6 #1 0x000055a43a906808 in compare_files (size=29, vpath2=0x55a43ba32700, vpath1=0x55a43ba3f2c0) at cmd.c:238 #2 compare_dir (panel=0x55a43ba2c560, other=0x55a43ba33b70, mode=mode@entry=compare_thourough) at cmd.c:339 #3 0x000055a43a908042 in compare_dirs_cmd () at cmd.c:1165 #4 0x000055a43a8a9d05 in midnight_execute_cmd (sender=0x55a43ba22a00, command=109) at midnight.c:1115 #5 0x000055a43a8d903d in send_message (data=0x0, parm=, msg=MSG_ACTION, sender=0x55a43ba22a00, w=) at ../../lib/widget/widget-common.h:210 #6 menubar_execute (menubar=0x55a43ba22a00) at menu.c:345 #7 0x000055a43a8d9baa in menubar_handle_key (key=, menubar=0x55a43ba22a00) at menu.c:533 #8 menubar_callback (w=0x55a43ba22a00, sender=, msg=, parm=, data=) at menu.c:627 #9 0x000055a43a8925ca in send_message (data=0x0, parm=99, msg=MSG_HOTKEY, sender=0x0, w=0x55a43ba22a00) at ../../lib/widget/widget-common.h:210 #10 dlg_try_hotkey (h=0x55a43ba12210, h=0x55a43ba12210, d_key=99) at dialog.c:422 #11 dlg_key_event (d_key=99, h=0x55a43ba12210) at dialog.c:482 #12 dlg_process_event (h=0x55a43ba12210, key=99, event=) at dialog.c:1164 #13 0x000055a43a8928ab in frontend_dlg_run (h=0x55a43ba12210) at dialog.c:544 #14 dlg_run (h=0x55a43ba12210) at dialog.c:1197 #15 0x000055a43a8ab42c in do_nc () at midnight.c:1783 #16 0x000055a43a886504 in main (argc=, argv=) at main.c:409 (gdb) bt full #0 0x00007fcc3acba480 in __memcmp_avx2_movbe () from /usr/lib/libc.so.6 No symbol table info available. #1 0x000055a43a906808 in compare_files (size=29, vpath2=0x55a43ba32700, vpath1=0x55a43ba3f2c0) at cmd.c:238 data2 = 0x7fcc3b35f000 data1 = 0x7fcc3b389000 file2 = file1 = result = -1 file1 = result = file2 = data1 = data2 = #2 compare_dir (panel=0x55a43ba2c560, other=0x55a43ba33b70, mode=mode@entry=compare_thourough) at cmd.c:339 src_name = 0x55a43ba3f2c0 dst_name = 0x55a43ba32700 target = source = i = 2 j = #3 0x000055a43a908042 in compare_dirs_cmd () at cmd.c:1165 choice = 2 thorough_flag = compare_thourough #4 0x000055a43a8a9d05 in midnight_execute_cmd (sender=0x55a43ba22a00, command=109) at midnight.c:1115 res = MSG_HANDLED #5 0x000055a43a8d903d in send_message (data=0x0, parm=, msg=MSG_ACTION, sender=0x55a43ba22a00, w=) at ../../lib/widget/widget-common.h:210 ret = MSG_NOT_HANDLED ret = #6 menubar_execute (menubar=0x55a43ba22a00) at menu.c:345 w = 0x55a43ba22a00 menu = entry = 0x55a43ba0fe10 #7 0x000055a43a8d9baa in menubar_handle_key (key=, menubar=0x55a43ba22a00) at menu.c:533 entry = menu = 0x55a43ba21170 i = 0x55a43ba0c560 = {0x55a43ba0fe10, 0x55a43ba0feb0, 0x55a43ba0ff50, 0x55a43ba0fff0, 0x0, 0x55a43ba10090, 0x55a43ba10130, 0x55a43ba20e50, 0x55a43ba20ef0, 0x55a43ba20f90, 0x0, 0x55a43ba21030, 0x55a43ba210d0, 0x55a43ba0fa00} #8 menubar_callback (w=0x55a43ba22a00, sender=, msg=, parm=, data=) at menu.c:627 menubar = 0x55a43ba22a00 #9 0x000055a43a8925ca in send_message (data=0x0, parm=99, msg=MSG_HOTKEY, sender=0x0, w=0x55a43ba22a00) at ../../lib/widget/widget-common.h:210 ret = MSG_NOT_HANDLED ret = #10 dlg_try_hotkey (h=0x55a43ba12210, h=0x55a43ba12210, d_key=99) at dialog.c:422 hot_cur = current = 0x55a43ba22a00 handled = MSG_NOT_HANDLED c = 99 hot_cur = current = handled = c = #11 dlg_key_event (d_key=99, h=0x55a43ba12210) at dialog.c:482 handled = handled = #12 dlg_process_event (h=0x55a43ba12210, key=99, event=) at dialog.c:1164 No locals. #13 0x000055a43a8928ab in frontend_dlg_run (h=0x55a43ba12210) at dialog.c:544 d_key = wh = 0x55a43ba12210 event = {buttons = 0, x = -1, y = 982048309, type = (GPM_DOWN | GPM_DOUBLE | GPM_MFLAG | GPM_HARD | unknown: 21504)} wh = event = d_key = #14 dlg_run (h=0x55a43ba12210) at dialog.c:1197 No locals. #15 0x000055a43a8ab42c in do_nc () at midnight.c:1783 ret = #16 0x000055a43a886504 in main (argc=, argv=) at main.c:409 mcerror = 0x0 config_migrated = 0 config_migrate_msg = 0x0 exit_code = 1 (gdb) q PID: 13484 (mc) UID: 1000 (user) GID: 1000 (user) Signal: 7 (BUS) Timestamp: Mon 2019-05-06 13:36:45 CEST (11min ago) Command Line: /usr/bin/mc -P /tmp/mc-user/mc.pwd.1908 --nomouse --subshell --stickchars Executable: /usr/bin/mc Control Group: /system.slice/sshd.service Unit: sshd.service Slice: system.slice Boot ID: 85b887fbf341469ea4a8be2dd78878ac Machine ID: 5767ef25f523419aaa049f3d74481940 Hostname: i87k Storage: /var/lib/systemd/coredump/core.mc.1000.85b887fbf341469ea4a8be2dd78878ac.13484.1557142605000000 Message: Process 13484 (mc) of user 1000 dumped core. Stack trace of thread 13484: #0 0x00007fcc3acba480 __memcmp_avx2_movbe (libc.so.6) #1 0x000055a43a906808 compare_files (mc) #2 0x000055a43a908042 compare_dirs_cmd (mc) #3 0x000055a43a8a9d05 midnight_execute_cmd (mc) #4 0x000055a43a8d903d send_message (mc) #5 0x000055a43a8d9baa menubar_handle_key (mc) #6 0x000055a43a8925ca send_message (mc) #7 0x000055a43a8928ab frontend_dlg_run (mc) #8 0x000055a43a8ab42c do_nc (mc) #9 0x000055a43a886504 main (mc) #10 0x00007fcc3ab83ce3 __libc_start_main (libc.so.6) #11 0x000055a43a88666e _start (mc) }}} ''' What steps will reproduce the problem?''' Attached directory structure and files for reproduction purposes: 1. chdir into ''/home/user/TODO/coredump_mc/leftdir/mc'' on the left panel 2. chdir into ''/home/user/TODO/coredump_mc/rightdir/mc'' on the right panel 3. then do ''F9'', ''c'', ''c'','' T'' to compare the dirs and crash The above stacktrace was on an Intel i8700k CPU desktop PC(has avx and avx2), the below one is on an Ideapad Z575 laptop with AMD A6-3400M APU with Radeon(tm) HD Graphics CPU (it doesn't have avx): {{{ $ coredumpctl gdb PID: 31065 (mc) UID: 1000 (user) GID: 1000 (user) Signal: 7 (BUS) Timestamp: Mon 2019-05-06 14:00:12 CEST (1min 34s ago) Command Line: /usr/bin/mc -P /tmp/mc-user/mc.pwd.25438 --nomouse --subshell --stickchars Executable: /usr/bin/mc Control Group: /user.slice/user-1000.slice/session-c1.scope Unit: session-c1.scope Slice: user-1000.slice Session: c1 Owner UID: 1000 (user) Boot ID: dfe6cd331478451b8c6522386e636e51 Machine ID: ac27e28ecb9e47208f622bcf7f772c6b Hostname: Z575 Storage: /var/lib/systemd/coredump/core.mc.1000.dfe6cd331478451b8c6522386e636e51.31065.1557144012000000 Message: Process 31065 (mc) of user 1000 dumped core. Stack trace of thread 31065: #0 0x00007f93b4764100 __memcmp_sse2 (libc.so.6) #1 0x0000564da47c0527 compare_files (mc) #2 0x0000564da476191d midnight_execute_cmd (mc) #3 0x0000564da479231d send_message (mc) #4 0x0000564da4792eda menubar_handle_key (mc) #5 0x0000564da4749b14 send_message (mc) #6 0x0000564da4749df9 frontend_dlg_run (mc) #7 0x0000564da4762fec do_nc (mc) #8 0x0000564da473d53c main (mc) #9 0x00007f93b46effce __libc_start_main (libc.so.6) #10 0x0000564da473d6be _start (mc) GNU gdb (GDB) 8.2.1 Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type ""show copying"" and ""show warranty"" for details. This GDB was configured as ""x86_64-pc-linux-gnu"". Type ""show configuration"" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type ""help"". Type ""apropos word"" to search for commands related to ""word""... Reading symbols from /usr/bin/mc...done. [New LWP 31065] [Thread debugging using libthread_db enabled] Using host libthread_db library ""/usr/lib/libthread_db.so.1"". Core was generated by `/usr/bin/mc -P /tmp/mc-user/mc.pwd.25438 --nomouse --subshell --stickchars'. Program terminated with signal SIGBUS, Bus error. #0 __memcmp_sse2 () at ../sysdeps/x86_64/memcmp.S:40 40 ../sysdeps/x86_64/memcmp.S: No such file or directory. (gdb) bt #0 __memcmp_sse2 () at ../sysdeps/x86_64/memcmp.S:40 #1 0x0000564da47c0527 in compare_files (size=29, vpath2=0x564da4e0fe70, vpath1=0x564da4e13880) at cmd.c:238 #2 compare_dir (panel=0x564da4e0d500, other=0x564da4e0e8b0, mode=compare_thourough) at cmd.c:339 #3 0x0000564da47c1e18 in compare_dirs_cmd () at cmd.c:1166 #4 0x0000564da476191d in midnight_execute_cmd (sender=0x564da4dff080, command=109) at midnight.c:1115 #5 0x0000564da479231d in send_message (data=0x0, parm=, msg=MSG_ACTION, sender=0x564da4dff080, w=) at ../../lib/widget/widget-common.h:210 #6 menubar_execute (menubar=0x564da4dff080) at menu.c:345 #7 0x0000564da4792eda in menubar_handle_key (key=, menubar=0x564da4dff080) at menu.c:533 #8 menubar_callback (w=0x564da4dff080, sender=, msg=, parm=, data=) at menu.c:627 #9 0x0000564da4749b14 in send_message (data=0x0, parm=99, msg=MSG_HOTKEY, sender=0x0, w=0x564da4dff080) at ../../lib/widget/widget-common.h:210 #10 dlg_try_hotkey (h=0x564da4df2000, h=0x564da4df2000, d_key=99) at dialog.c:422 #11 dlg_key_event (d_key=99, h=0x564da4df2000) at dialog.c:482 #12 dlg_process_event (h=0x564da4df2000, key=99, event=) --Type for more, q to quit, c to continue without paging--c at dialog.c:1164 #13 0x0000564da4749df9 in frontend_dlg_run (h=0x564da4df2000) at dialog.c:544 #14 dlg_run (h=0x564da4df2000) at dialog.c:1197 #15 0x0000564da4762fec in do_nc () at midnight.c:1783 #16 0x0000564da473d53c in main (argc=, argv=) at main.c:409 (gdb) bt full #0 __memcmp_sse2 () at ../sysdeps/x86_64/memcmp.S:40 No locals. #1 0x0000564da47c0527 in compare_files (size=29, vpath2=0x564da4e0fe70, vpath1=0x564da4e13880) at cmd.c:238 data2 = 0x7f93b4f05000 data1 = file2 = file1 = result = -1 file1 = result = file2 = data1 = data2 = #2 compare_dir (panel=0x564da4e0d500, other=0x564da4e0e8b0, mode=compare_thourough) at cmd.c:339 src_name = 0x564da4e13880 dst_name = 0x564da4e0fe70 target = source = i = 2 j = --Type for more, q to quit, c to continue without paging--c #3 0x0000564da47c1e18 in compare_dirs_cmd () at cmd.c:1166 choice = thorough_flag = #4 0x0000564da476191d in midnight_execute_cmd (sender=0x564da4dff080, command=109) at midnight.c:1115 res = MSG_HANDLED #5 0x0000564da479231d in send_message (data=0x0, parm=, msg=MSG_ACTION, sender=0x564da4dff080, w=) at ../../lib/widget/widget-common.h:210 ret = MSG_NOT_HANDLED ret = #6 menubar_execute (menubar=0x564da4dff080) at menu.c:345 w = 0x564da4dff080 menu = entry = 0x564da4dfd8a0 #7 0x0000564da4792eda in menubar_handle_key (key=, menubar=0x564da4dff080) at menu.c:533 entry = menu = 0x564da4df2460 i = 0x564da4ded160 = {0x564da4dfd8a0, 0x564da4dfd940, 0x564da4df4b90, 0x564da4df4c30, 0x0, 0x564da4df4cd0, 0x564da4df4d70, 0x564da4df4e10, 0x564da4df05f0, 0x564da4df0690, 0x0, 0x564da4df0730, 0x564da4df07d0, 0x564da4df0870} #8 menubar_callback (w=0x564da4dff080, sender=, msg=, parm=, data=) at menu.c:627 menubar = 0x564da4dff080 #9 0x0000564da4749b14 in send_message (data=0x0, parm=99, msg=MSG_HOTKEY, sender=0x0, w=0x564da4dff080) at ../../lib/widget/widget-common.h:210 ret = MSG_NOT_HANDLED ret = #10 dlg_try_hotkey (h=0x564da4df2000, h=0x564da4df2000, d_key=99) at dialog.c:422 hot_cur = current = 0x564da4dff080 handled = MSG_NOT_HANDLED c = 99 hot_cur = current = handled = c = #11 dlg_key_event (d_key=99, h=0x564da4df2000) at dialog.c:482 handled = handled = #12 dlg_process_event (h=0x564da4df2000, key=99, event=) at dialog.c:1164 No locals. #13 0x0000564da4749df9 in frontend_dlg_run (h=0x564da4df2000) at dialog.c:544 d_key = wh = 0x564da4df2000 event = {buttons = -1528805856, x = -1, y = -1534984512, type = (GPM_MOVE | GPM_DOWN | GPM_UP | GPM_TRIPLE | unknown: 22016)} wh = event = d_key = #14 dlg_run (h=0x564da4df2000) at dialog.c:1197 No locals. #15 0x0000564da4762fec in do_nc () at midnight.c:1783 ret = #16 0x0000564da473d53c in main (argc=, argv=) at main.c:409 mcerror = 0x0 config_migrated = 0 config_migrate_msg = 0x0 exit_code = 1 (gdb) q }}} " defect closed major mc-core master worksforme howaboutsynergy@… 4542 no branch