Hi all, I just ran into an issue during upgrading an NFS root FS with Debian Sid not touched for quite a while:
I originally had gcc-7 and gcc-8 installed and `apt upgrade` gave me the following list for "NEW packages" to be installed: ``` cpp-9 gcc-10-base gcc-9 gcc-9-base gfortran-9 libapt-pkg6.0 libcbor0 libcrypt-dev libcrypt1 libctf-nobfd0 libctf0 libdns-export1109 libevent-2.1-7 libffi7 libfido2-1 libgcc-9-dev libgcc-s4 libgfortran-9-dev libhogweed5 libicu63 libip4tc2 libip6tc2 libisc-export1105 libisl22 libjson-c4 libnettle7 libnftables1 libperl5.30 libprocps8 libpython3.8-minimal libpython3.8-stdlib libreadline8 linux-image-5.4.0-4-parisc logsave pci.ids perl-modules-5.30 python3.8 python3.8-minimal ``` ...but during upgrading the packages a problem surfaced: ``` [...] Unpacking libgcc-s4:hppa (10-20200222-1) ... dpkg: error processing archive /var/cache/apt/archives/libgcc-s4_10-20200222-1_hppa.deb (--unpack): trying to overwrite '/lib/hppa-linux-gnu/libgcc_s.so.4', which is also in package libgcc4:hppa 1:8.3.0-3 Errors were encountered while processing: /var/cache/apt/archives/libgcc-s4_10-20200222-1_hppa.deb E: Sub-process /usr/bin/dpkg returned an error code (1) [...] ``` ...which I was unable to solve with `apt`. In the end I could solve it by manually installing libgcc4 from [1] together with libgcc-s4 from [2] with `dpkg -i [...]`. [1]: http://snapshot.debian.org/archive/debian-ports/20200229T090821Z/pool-hppa/main/g/gcc-10/libgcc4_10-20200222-1_hppa.deb [2]: http://snapshot.debian.org/archive/debian-ports/20200229T090821Z/pool-hppa/main/g/gcc-10/libgcc-s4_10-20200222-1_hppa.deb To me it looks like libgcc-s4 is related to gcc-10 and is a dependency of newer libgcc4 versions related to gcc-10 and if dependencies are installed earlier then their dependents - which would make sense - this problem seems to be unsolvable if the originally installed libgcc4 version "shares" files with a dependency of its newer version. Am I correct here? OTOH gcc-10 wasn't installed during this upgrade - I only installed it manually later for a test - so maybe some other package out of: ``` root@c8000:~# apt-cache rdepends --installed libgcc-s4 libgcc-s4 Reverse Depends: libgcc-10-dev zstd libstdc++6 libgcc4 libcc1-0 libapt-pkg6.0 gcc-10 apt apt-utils ``` ...was pulling in libgcc-s4 during the upgrade process (zstd, libstdc++6, libcc1-0, apt and apt-utils were upgraded in this process, libapt-pkg6.0 was newly installed). Not sure if that is actually a bug in the dependencies of one of these packages, as an upgrade seems to not work for a case like mine then. Did anybody else run into this issue? Cheers Frank
