Bug#950551: libgcc1: after libgcc1 upgrade, can't unlock luks partition at boot

[William Leung <rbt12412-bugreport@yahoo.com>]

Package: libgcc1
Version: 1:10-20200202-1
Followup-For: Bug #950551

Same here. Did apt dist-upgrade and rebooted, then the libgcc_s.so.1 error
message appeared.

Tried OP method and worked:
1) Boot to an Ubuntu live USB
2) sudo cryptsetup open ...
3) chroot
4) Downgrade libgcc1 from 1:10-20200202-1 to 1:9.2.1-25
5) update-initramfs -u

After system restored, I upgraded libgcc1 again to reconfirm the problem.
This time, instead of downgrading libgcc1 in step 4, I just made symbolic link
to the file /lib/libgcc_s.so.1 under /lib/x86_64-linux-gnu/
This also worked for me.



-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.4.0-3-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_CRAP, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_HK.UTF-8, LC_CTYPE=en_HK.UTF-8 (charmap=UTF-8),
LANGUAGE=en_HK:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libgcc1 depends on:
ii  gcc-10-base  10-20200202-1
ii  libc6        2.29-9
ii  libgcc-s1    10-20200202-1

libgcc1 recommends no packages.

libgcc1 suggests no packages.