Bug#1020802: libz3-4: Xorg crashes on startup due to illegal instruction (SSE2) in libz3-4

[Russ Dill]

Package: libz3-4
Version: 4.8.12-1+b2
Severity: important
X-Debbugs-Cc: russ.dill at gmail.com

Dear Maintainer,

Running Xorg on my Pentium Pro system crashes with an illegal instruction:

(gdb) run
Starting program: /usr/lib/xorg/Xorg 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

X.Org X Server 1.21.1.4
X Protocol Version 11, Revision 0
Current Operating System: Linux ppro 5.19.0-2-686 #1 SMP PREEMPT_DYNAMIC Debian 5.19.11-1 (2022-09-24) i686
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.19.0-2-686 root=UUID=dbeee09d-4412-49ab-9c61-a0900452f978 ro apic=debug console=tty0 console=ttyS0,115200 earlyprintk=serial,ttyS0,115200 mitigations=off
xorg-server 2:21.1.4-2 (https://www.debian.org/support) 
Current version of pixman: 0.40.0
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Sep 26 15:14:33 2022
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
xf86TokenToOptinfo: table is NULL
xf86TokenToOptinfo: table is NULL

Program received signal SIGILL, Illegal instruction.
0xa95672de in ?? () from /lib/i386-linux-gnu/libz3.so.4

There doesn't seem to be an easy way to build libz3-4 without SSE support.

-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 5.19.0-2-686 (SMP w/2 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
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 libz3-4 depends on:
ii  libc6       2.35-1
ii  libgcc-s1   12.2.0-3
ii  libstdc++6  12.2.0-3

libz3-4 recommends no packages.

libz3-4 suggests no packages.

-- no debconf information