[Bug 1894404] Re: update-manager assert failure: corrupted double-linked list

[Apport retracing service]

** Tags added: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1894404

Title:
  update-manager assert failure: corrupted double-linked list

Status in update-manager package in Ubuntu:
  New

Bug description:
  1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu: 
  Description:	Ubuntu Groovy Gorilla (development branch)
  Release:	20.10
  2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center
  1:20.10.1
  3) What you expected to happen
  I expected to see the window "Your system is up to date"
  4) What happened instead
  It crashed and Ubuntu asked me to send the report.

  ProblemType: Crash
  DistroRelease: Ubuntu 20.10
  Package: update-manager 1:20.10.1
  ProcVersionSignature: Ubuntu 5.8.0-18.19-generic 5.8.4
  Uname: Linux 5.8.0-18-generic x86_64
  ApportVersion: 2.20.11-0ubuntu45
  Architecture: amd64
  AssertionMessage: corrupted double-linked list
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Sep  6 00:55:20 2020
  ExecutablePath: /usr/bin/update-manager
  InstallationDate: Installed on 2020-09-05 (0 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  InterpreterPath: /usr/bin/python3.8
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=es_ES.UTF-8
   SHELL=/bin/bash
  Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: N/A
  Signal: 6
  SourcePackage: update-manager
  StacktraceTop:
   __libc_message (action=action at entry=do_abort, fmt=fmt at entry=0x7f61a86a2285 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
   malloc_printerr (str=str at entry=0x7f61a86a0457 "corrupted double-linked list") at malloc.c:5347
   unlink_chunk (p=p at entry=0x342f050, av=0x7f61a86d3b80 <main_arena>) at malloc.c:1460
   malloc_consolidate (av=av at entry=0x7f61a86d3b80 <main_arena>) at malloc.c:4494
   _int_malloc (av=av at entry=0x7f61a86d3b80 <main_arena>, bytes=bytes at entry=1368) at malloc.c:3699
  Title: update-manager assert failure: corrupted double-linked list
  UpgradeStatus: Upgraded to groovy on 2020-09-05 (0 days ago)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
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