Nixos-rebuild fails because bash is broken (dependency issue in libpthread.so.0, undefined symbol: __nanosleep_nocancel)

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1

If I try to run nixos-rebuild switch I get

/nix/store/j8vysakw78bpgngba32hfwwikqda9yx2-bash-4.4-p23/bin/bash: symbol lookup error: /nix/store/bqbg6hb2jsl3kvf6jgmgfdqy06fpjrrn-glibc-2.30/lib/libpthread.so.0: undefined symbol: __nanosleep_nocancel, version GLIBC_PRIVATE

I get the same when running /nix/store/j8vysakw78bpgngba32hfwwikqda9yx2-bash-4.4-p23/bin/bash. What is weird, that I some version of bash must be working, otherwise I could not log in o.O.

/run/current-system/sw/bin/bash points to a different object in storage, namely /nix/store/x4gd806afbgx0ag1jf8y7blzrrhiyx8q-bash-interactive-4.4-p23/bin/bash

Happened sometime three weeks ago after an update on the unstable channel. What went wrong? Can this be repaired?

2

This seems to be an issue with LD preloading. Temporarily renaming

mv ld-nix.so.preload ld-nix.so.preload.disabled

helped. Can someone explain?

3

Should be only a temporary breakage due to breaking changes in the GNU C library (glibc) version 2.31 (Nixpkgs merge: 5e7d581ffdba220d088ed92f382a41acb37670e1).

I believe that due to impurities it can happen that binaries build with glibc 2.30 do now load glibc 2.31 which causes these issues (as e.g. the __nanosleep_nocancel function was removed). Another such breakage: MESA-LOADER: failed to open $driver · Issue #94315 · NixOS/nixpkgs · GitHub

But I haven’t really looked into the details (e.g. why a newer glibc version is used / where the impurities come from - but I think there is already an old Nix/Nixpkgs issue about this).

4

Trying to fix this there: glibc: fix /etc/ld-nix.so.preload sharing by ju1m · Pull Request #96289 · NixOS/nixpkgs · GitHub