Package: zsh
Version: 5.9-4+b5
Severity: normal
File: /bin/zsh

Dear Maintainer,

A zsh process dumped core when the login session was ended (likely due
to a failed network connection). Here are the relevant logs:

-----
May 14 17:56:27 host sshd[1733250]: pam_unix(sshd:session): session closed for user
May 14 17:56:27 host systemd-logind[566]: Session 18 logged out. Waiting for processes to exit.
May 14 17:56:27 host kernel: show_signal_msg: 1 callbacks suppressed
May 14 17:56:27 host kernel: zsh[1733257]: segfault at 0 ip 0000558b81d54b3e sp 00007ffc254531f0 error 6 in zsh[558b81cc8000+9a000] likely on CPU 1 (core 0, socket 1)
May 14 17:56:27 host kernel: Code: b6 13 48 8d 41 01 48 83 c3 01 83 f2 20 88 51 01 48 8d 48 01 48 39 de 74 1c 0f b6 13 f6 44 57 01 10 75 d9 48 89 c8 48 83 c3 01 <88> 11 48 8d 48 01 48 39 de 75 e4 c6 01 00 48 83 c4 18 4c 89 e0 5b
May 14 17:56:27 host systemd-coredump[3885063]: Process 1733257 (zsh) of user 1000 dumped core.
May 14 17:56:27 host systemd-logind[566]: Removed session 18.
-----

Here is the relevant coredump info:

PID: 1733257 (zsh)
Signal: 11 (SEGV)
Timestamp: Wed 2025-05-14 17:56:27 PDT
Command Line: -zsh
Executable: /usr/bin/zsh
Control Group: /user.slice/user-1000.slice/session-18.scope
Unit: session-18.scope
Slice: user-1000.slice
Session: 18
Message: Process 1733257 (zsh) of user 1000 dumped core.

Stack trace of thread 1733257:
#0 0x0000558b81d54b3e wcs_nicechar_sel (zsh + 0xa3b3e)
#1 0x0000558b81d59346 mb_niceformat (zsh + 0xa8346)
#2 0x0000558b81d59a2d n/a (zsh + 0xa8a2d)
#3 0x0000558b81d59b5a zerr (zsh + 0xa8b5a)
#4 0x0000558b81d0bf6d update_job (zsh + 0x5af6d)
#5 0x0000558b81d442f4 wait_for_processes (zsh + 0x932f4)
#6 0x0000558b81d43dd5 zhandler (zsh + 0x92dd5)
#7 0x0000558b81d1bbbe zrealloc (zsh + 0x6abbe)
#8 0x0000558b81d54a86 wcs_nicechar_sel (zsh + 0xa3a86)
#9 0x0000558b81d59346 mb_niceformat (zsh + 0xa8346)
#10 0x0000558b81d59a2d n/a (zsh + 0xa8a2d)
#11 0x0000558b81d5a05a zwarn (zsh + 0xa905a)
#12 0x0000558b81cdf47a zexit (zsh + 0x2e47a)
#13 0x0000558b81d43f89 zhandler (zsh + 0x92f89)
#14 0x00007f0b419f7050 n/a (libc.so.6 + 0x3c050)
#15 0x00007f0b419f72d5 __sigsuspend (libc.so.6 + 0x3c2d5)
#16 0x0000558b81d43367 signal_suspend (zsh + 0x92367)
#17 0x0000558b81d0c464 n/a (zsh + 0x5b464)
#18 0x0000558b81d0cc64 waitjobs (zsh + 0x5bc64)
#19 0x0000558b81cec1e2 n/a (zsh + 0x3b1e2)
#20 0x0000558b81ced133 execlist (zsh + 0x3c133)
#21 0x0000558b81d156c4 execif (zsh + 0x646c4)
#22 0x0000558b81ce9895 n/a (zsh + 0x38895)
#23 0x0000558b81ceb5ce n/a (zsh + 0x3a5ce)
#24 0x0000558b81ceb97b n/a (zsh + 0x3a97b)
#25 0x0000558b81ced133 execlist (zsh + 0x3c133)
#26 0x0000558b81d15dc7 execcase (zsh + 0x64dc7)
#27 0x0000558b81ce9895 n/a (zsh + 0x38895)
#28 0x0000558b81ceb5ce n/a (zsh + 0x3a5ce)
#29 0x0000558b81ceb97b n/a (zsh + 0x3a97b)
#30 0x0000558b81ced133 execlist (zsh + 0x3c133)
#31 0x0000558b81d1579b execif (zsh + 0x6479b)
#32 0x0000558b81ce9895 n/a (zsh + 0x38895)
#33 0x0000558b81ceb5ce n/a (zsh + 0x3a5ce)
#34 0x0000558b81ceb97b n/a (zsh + 0x3a97b)
#35 0x0000558b81ced133 execlist (zsh + 0x3c133)
#36 0x0000558b81d1579b execif (zsh + 0x6479b)
#37 0x0000558b81ce9895 n/a (zsh + 0x38895)
#38 0x0000558b81ceb5ce n/a (zsh + 0x3a5ce)
#39 0x0000558b81ceb97b n/a (zsh + 0x3a97b)
#40 0x0000558b81ced133 execlist (zsh + 0x3c133)
#41 0x0000558b81ceda02 execode (zsh + 0x3ca02)
#42 0x0000558b81d03c4a loop (zsh + 0x52c4a)
#43 0x0000558b81d06569 source (zsh + 0x55569)
#44 0x0000558b81ccfb31 bin_dot (zsh + 0x1eb31)
#45 0x0000558b81cd8ed3 execbuiltin (zsh + 0x27ed3)
#46 0x0000558b81ceaec7 n/a (zsh + 0x39ec7)
#47 0x0000558b81ceb5ce n/a (zsh + 0x3a5ce)
#48 0x0000558b81ceb97b n/a (zsh + 0x3a97b)
#49 0x0000558b81ced61f execlist (zsh + 0x3c61f)
#50 0x0000558b81ceda02 execode (zsh + 0x3ca02)
#51 0x0000558b81d03c4a loop (zsh + 0x52c4a)
#52 0x0000558b81d06569 source (zsh + 0x55569)
#53 0x0000558b81d06c32 run_init_scripts (zsh + 0x55c32)
#54 0x0000558b81d07956 zsh_main (zsh + 0x56956)
#55 0x00007f0b419e224a n/a (libc.so.6 + 0x2724a)
#56 0x00007f0b419e2305 __libc_start_main (libc.so.6 + 0x27305)
#57 0x0000558b81cc8d31 _start (zsh + 0x17d31)
ELF object binary architecture: AMD x86-64

Kind regards.


-- Package-specific info:

Packages which provide vendor completions:

Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description +++-================-==================-============-=======================================================
ii curl 7.88.1-10+deb12u12 amd64 command line tool for transferring data with URL syntax
ii etckeeper 1.18.20-1 all store /etc in git, mercurial, brz or darcs
ii systemd 252.36-1~deb12u1 amd64 system and service manager ii systemd-coredump 252.36-1~deb12u1 amd64 tools for storing and retrieving coredumps
ii systemd-resolved 252.36-1~deb12u1 amd64 systemd DNS resolver
ii udev 252.36-1~deb12u1 amd64 /dev/ and hotplug management daemon

dpkg-query: no path found matching pattern /usr/share/zsh/vendor-functions/


-- System Information:
Debian Release: 12.10
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-34-amd64 (SMP w/2 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages zsh depends on:
ii debianutils 5.7-0.5~deb12u1
ii libc6 2.36-9+deb12u10
ii libcap2 1:2.66-4
ii libtinfo6 6.4-4
ii zsh-common 5.9-4

Versions of packages zsh recommends:
ii libc6 2.36-9+deb12u10
ii libgdbm6 1.23-3
ii libncursesw6 6.4-4
ii libpcre3 2:8.39-15

Versions of packages zsh suggests:
pn zsh-doc <none>

-- no debconf information

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

* Rob Leslie [Thu May 15, 2025 at 12:18:22PM -0700]:

Package: zsh
Version: 5.9-4+b5
Severity: normal
File: /bin/zsh

Dear Maintainer,

A zsh process dumped core when the login session was ended (likely due
to a failed network connection). Here are the relevant logs:

-----
May 14 17:56:27 host sshd[1733250]: pam_unix(sshd:session): session closed for user
May 14 17:56:27 host systemd-logind[566]: Session 18 logged out. Waiting for processes to exit.
May 14 17:56:27 host kernel: show_signal_msg: 1 callbacks suppressed
May 14 17:56:27 host kernel: zsh[1733257]: segfault at 0 ip 0000558b81d54b3e sp 00007ffc254531f0 error 6 in zsh[558b81cc8000+9a000] likely on CPU 1 (core 0, socket 1)
May 14 17:56:27 host kernel: Code: b6 13 48 8d 41 01 48 83 c3 01 83 f2 20 88 51 01 48 8d 48 01 48 39 de 74 1c 0f b6 13 f6 44 57 01 10 75 d9 48 89 c8 48 83 c3 01 <88> 11 48 8d 48 01 48 39 de 75 e4 c6 01 00 48 83 c4 18 4c 89 e0 5b
May 14 17:56:27 host systemd-coredump[3885063]: Process 1733257 (zsh) of user 1000 dumped core.
May 14 17:56:27 host systemd-logind[566]: Removed session 18.
-----

Here is the relevant coredump info:

[...]

Is that reproducible for you somehow?

FTR, there's zsh 5.9-4+b6 with:

| * Binary-only non-maintainer upload for amd64; no source changes.
| * Rebuild for outdated Built-Using (glibc/2.36-9+deb12u5)

And latest Debian point-release 12.11 provides libc6
v2.36-9+deb12u10, wondering whether this would change anything,
assuming that it's even reproducible in some way at all.

regards
-mika-

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--- SoupGate-Win32 v1.05
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