I searched for clues why that libgcc_s.so.1 is not added and found the script: /usr/share/initramfs-tools/hooks/cryptroot
it contains the line: LIBC_DIR="$(ldd /sbin/cryptsetup | sed -nr 's#.* => (/lib.*)/libc\.so\.[0-9.-]+ \(0x[[:xdigit:]]+\)$#\1#p')" but on my machine there is no /bin/libc.so.[0-9.-]+ instead it is in /usr/lib/x86_64-linux-gnu. Therefore $LIBC_DIR is empty which leads to the "find: ‘’: No such file or directory" error message in the log (https://paste.debian.net/1099530/) Allowing any number of characters before the /lib fixes the problem: LIBC_DIR="$(ldd /sbin/cryptsetup | sed -nr 's#.* => (.*/lib.*)/libc\.so\.[0-9.-]+ \(0x[[:xdigit:]]+\)$#\1#p')" I changed this and now the 5.2 kernel boots again. I made a merge request: https://salsa.debian.org/cryptsetup-team/cryptsetup/merge_requests/10
