[Bug 2132394] Re: apt full-upgrade aborts on assertion failure

Wed Nov 26 17:25:33 UTC 2025

You're right that this "steam-stable" repository is unsupported on ARM.

I have found that when running `dpkg --add-architecture amd64` and
`i386`, the same problem occurs, if this should make any difference.

Here is the backtrace from gdb.  Seems to be somewhat incomplete and I'm
not sure if that's because of debuginfod not working properly, or just
because of optimizations.

(gdb) bt                   
#0  __pthread_kill_implementation (threadid=281474842413344, signo=signo at entry=6, no_tid=no_tid at entry=0) at ./nptl/pthread_kill.c:44                                    
#1  0x0000fffff787d934 [PAC] in __pthread_kill_internal (threadid=<optimised out>, signo=6) at ./nptl/pthread_kill.c:89                                                 
#2  0x0000fffff7827e3c in __GI_raise (sig=sig at entry=6) at ../sysdeps/posix/raise.c:26                                                                                   
#3  0x0000fffff7811d88 [PAC] in __GI_abort () at ./stdlib/abort.c:77
#4  0x0000fffff78208a0 [PAC] in __assert_fail_base (fmt=<optimised out>, assertion=<optimised out>, file=0xfffff7e85988 "./apt-pkg/solver3.cc", line=65,                
    function=<optimised out>) at ./assert/assert.c:118
#5  0x0000fffff7e4a94c [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0
#6  0x0000fffff7e522dc [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0
#7  0x0000fffff7e52690 [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0
#8  0x0000fffff7e528dc [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0 
#9  0x0000fffff7e592c0 [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0 
#10 0x0000fffff7e1601c [PAC] in EDSP::ResolveExternal(char const*, pkgDepCache&, unsigned int, OpProgress*) () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0            
#11 0x0000fffff7e696d0 [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0
#12 0x0000fffff7f1c030 [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-private.so.0.0                                                                                 
#13 0x0000fffff7f28db4 [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-private.so.0.0                                                                                 
#14 0x0000fffff7f631c0 [PAC] in ?? () from /lib/aarch64-linux-gnu/libapt-private.so.0.0                                                                                 
#15 0x0000fffff7d8acd4 [PAC] in CommandLine::DispatchArg(CommandLine::Dispatch const*, bool) () from /lib/aarch64-linux-gnu/libapt-pkg.so.7.0                           
#16 0x0000fffff7f123ac [PAC] in DispatchCommandLine(CommandLine&, std::vector<CommandLine::Dispatch, std::allocator<CommandLine::Dispatch> > const&) ()                 
   from /lib/aarch64-linux-gnu/libapt-private.so.0.0
#17 0x0000aaaaaaaa21d4 [PAC] in ?? ()                                               
#18 0x0000fffff781259c [PAC] in __libc_start_call_main (main=main at entry=0xaaaaaaaa2100, argc=argc at entry=2, argv=argv at entry=0xfffffffffc58)                              
    at ../sysdeps/nptl/libc_start_call_main.h:58
#19 0x0000fffff781267c [PAC] in __libc_start_main_impl (main=0xaaaaaaaa2100, argc=2, argv=0xfffffffffc58, init=<optimised out>, fini=<optimised out>,                   
    rtld_fini=<optimised out>, stack_end=<optimised out>) at ../csu/libc-start.c:360
#20 0x0000aaaaaaaa2330 [PAC] in ?? ()

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https://bugs.launchpad.net/bugs/2132394

Title:
  apt full-upgrade aborts on assertion failure

Status in apt package in Ubuntu:
  Incomplete

Bug description:
  Running any of the following commands:

      apt full-upgrade
      apt dist-upgrade
      apt-get full-upgrade
      apt-get dist-upgrade

  crashes with the following assertion failure:

      apt-get: ./apt-pkg/solver3.cc:65: bool
  APT::Solver::CompareProviders3::operator()(APT::Solver::Var,
  APT::Solver::Var): Assertion `not va.end() && not vb.end()' failed.

  This is apt 3.1.6ubuntu2 arm64 on Ubuntu 25.10.

  I have the following repositories enabled in sources.list.d:

      fex-emu-ubuntu-fex-questing
      mozillateam-ubuntu-ppa-questing
      nvidia-container-toolkit
      steam-stable
      tomtomtom-ubuntu-yt-dlp-questing
      ubuntu

      Types: deb
      URIs: https://ppa.launchpadcontent.net/fex-emu/fex/ubuntu/
      Suites: questing
      Components: main

      Types: deb
      URIs: https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu/
      Suites: questing
      Components: main

      deb https://nvidia.github.io/libnvidia-
  container/stable/deb/$(ARCH) /

      deb [arch=amd64,i386] https://repo.steampowered.com/steam/ stable steam
      deb-src [arch=amd64,i386] https://repo.steampowered.com/steam/ stable steam

      Types: deb
      URIs: https://ppa.launchpadcontent.net/tomtomtom/yt-dlp/ubuntu/
      Suites: questing
      Components: main

      Types: deb
      URIs: http://ports.ubuntu.com/ubuntu-ports/
      Suites: questing questing-updates questing-backports questing-security
      Components: main restricted universe multiverse

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: apt 3.1.6ubuntu2
  ProcVersionSignature: Ubuntu 6.17.0-6.6-generic 6.17.1
  Uname: Linux 6.17.0-6-generic aarch64
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: arm64
  CasperMD5CheckResult: pass
  CurrentDesktop: sway
  Date: Tue Nov 25 11:13:37 2025
  InstallationDate: Installed on 2025-11-20 (5 days ago)
  InstallationMedia: Ubuntu 25.10 "Questing Quokka" - Release arm64 (20251007)
  ProcEnviron:
   LANG=en_GB.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/zsh
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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