Bug#1121119: libwebkit2gtk-4.0-37: illegal instruction after update (probably SSE2 again)

[Ondrej Zary]

Package: libwebkit2gtk-4.0-37
Version: 2.50.1-1~deb11u1
Severity: important
X-Debbugs-Cc: debian-lts at lists.debian.org

Dear Maintainer,
after upgrading libjavascriptcoregtk-4.0-18 and libwebkit2gtk-4.0-37 from 2.48.5-1~deb11u1
to 2.50.1-1~deb11u1, epiphany crashes with "Illegal instruction"
immediately. dmesg shows:
traps: epiphany[6265] trap invalid opcode ip:b1007366 sp:bff1f0c0 error:0 in libjavascriptcoregtk-4.0.so.18.28.6[b03a6000+d19000]

The code probably contains SSE2 instructions.

-- System Information:
Debian Release: 11.11
  APT prefers oldoldstable-updates
  APT policy: (500, 'oldoldstable-updates'), (500, 'oldoldstable-security'), (500, 'oldoldstable')
Architecture: i386 (i686)

Kernel: Linux 5.10.0-36-686-pae (SMP w/1 CPU thread)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libwebkit2gtk-4.0-37 depends on:
ii  bubblewrap                      0.4.1-3+deb11u1
ii  gstreamer1.0-plugins-base       1.18.4-2+deb11u4
ii  gstreamer1.0-plugins-good       1.18.4-2+deb11u3
ii  libatk1.0-0                     2.36.0-2
ii  libatomic1                      10.2.1-6
ii  libc++1-16                      1:16.0.6-15~deb11u2
ii  libc++abi1-16                   1:16.0.6-15~deb11u2
ii  libc6                           2.31-13+deb11u13
ii  libcairo-gobject2               1.16.0-5
ii  libcairo2                       1.16.0-5
ii  libdrm2                         2.4.104-1
ii  libenchant-2-2                  2.2.15-1
ii  libepoxy0                       1.5.5-1
ii  libflite1                       2.2-2
ii  libfontconfig1                  2.13.1-4.2
ii  libfreetype6                    2.10.4+dfsg-1+deb11u2
ii  libgcc-s1                       10.2.1-6
ii  libgcrypt20                     1.8.7-6
ii  libgdk-pixbuf-2.0-0             2.42.2+dfsg-1+deb11u4
ii  libgles2                        1.3.2-1
ii  libglib2.0-0                    2.66.8-1+deb11u6
ii  libgpg-error0                   1.38-2
ii  libgstreamer-gl1.0-0            1.18.4-2+deb11u4
ii  libgstreamer-plugins-base1.0-0  1.18.4-2+deb11u4
ii  libgstreamer1.0-0               1.18.4-2.1+deb11u1
ii  libgtk-3-0                      3.24.24-4+deb11u4
ii  libharfbuzz-icu0                2.7.4-1
ii  libharfbuzz0b                   2.7.4-1
ii  libhyphen0                      2.8.8-7
ii  libicu67                        67.1-7+deb11u1
ii  libjavascriptcoregtk-4.0-18     2.50.1-1~deb11u1
ii  libjpeg62-turbo                 1:2.0.6-4
ii  liblcms2-2                      2.12~rc1-2
ii  libpango-1.0-0                  1.46.2-3
ii  libpangocairo-1.0-0             1.46.2-3
ii  libpng16-16                     1.6.37-3
ii  libseccomp2                     2.5.1-1+deb11u1
ii  libsecret-1-0                   0.20.4-2
ii  libsoup2.4-1                    2.72.0-2+deb11u2
ii  libsqlite3-0                    3.34.1-3+deb11u1
ii  libsystemd0                     247.3-7+deb11u7
ii  libtasn1-6                      4.16.0-2+deb11u2
ii  libunwind-16                    1:16.0.6-15~deb11u2
ii  libwayland-client0              1.18.0-2~exp1.1
ii  libwayland-egl1                 1.18.0-2~exp1.1
ii  libwayland-server0              1.18.0-2~exp1.1
ii  libwebp6                        0.6.1-2.1+deb11u2
ii  libwebpdemux2                   0.6.1-2.1+deb11u2
ii  libwoff1                        1.0.2-1+b1
ii  libx11-6                        2:1.7.2-1+deb11u2
ii  libxml2                         2.9.10+dfsg-6.7+deb11u9
ii  libxslt1.1                      1.1.34-4+deb11u3
ii  xdg-dbus-proxy                  0.1.2-2
ii  zlib1g                          1:1.2.11.dfsg-2+deb11u2

Versions of packages libwebkit2gtk-4.0-37 recommends:
pn  gstreamer1.0-gl           <none>
pn  gstreamer1.0-libav        <none>
pn  gstreamer1.0-plugins-bad  <none>
ii  libgl1-mesa-dri           20.3.5-1
pn  xdg-desktop-portal-gtk    <none>

Versions of packages libwebkit2gtk-4.0-37 suggests:
pn  gstreamer1.0-alsa  <none>

-- debconf-show failed