This bug was fixed in the package pulseaudio - 1:15.0+dfsg1-1ubuntu2.1

---------------
pulseaudio (1:15.0+dfsg1-1ubuntu2.1) impish; urgency=medium

  * debian/patches/gitlab_ice_error.patch:
    - cherry pick an upstream candidate fix for a segfault issue in the
      session closing handling (lp: #1942685)

 -- Sebastien Bacher <seb...@ubuntu.com>  Fri, 22 Oct 2021 12:28:32
+0200

** Changed in: pulseaudio (Ubuntu Impish)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1942685

Title:
  pulseaudio crashed with SIGSEGV in _IceTransClose()

Status in PulseAudio:
  Unknown
Status in pulseaudio package in Ubuntu:
  Fix Released
Status in pulseaudio source package in Impish:
  Fix Released

Bug description:
  * Impact

  The pulseaudio service sometime segfaults on session closing which
  trigger a bug report dialog

  * Test plan

  Log out of a desktop session and back in, there should be no error
  prompt

  The issue isn't triggered only randomly it seems so it might be easier to 
check that reports stop on
  https://errors.ubuntu.com/problem/877172e07ed9f86b0674cd458a5aaf24b37fb01e

  * Where problems could occur

  The change is in the X session closing handling so shouldn't impact on
  normal use, if incorrect the fix could lead to increase the chance of
  hitting the segfault when an Xsession is closed

  
  ---

  Installing Xubuntu Impish daily ISO 04092021

  After install I rebooted - applied updates and then rebooted again-

  the errors (pulseaudio crashed with SIGSEGV in _IceTransClose() )
  occurred after logging in.

  ProblemType: Crash
  DistroRelease: Ubuntu 21.10
  Package: pulseaudio 1:15.0+dfsg1-1ubuntu2
  ProcVersionSignature: Ubuntu 5.13.0-14.14-generic 5.13.1
  Uname: Linux 5.13.0-14-generic x86_64
  ApportVersion: 2.20.11-0ubuntu68
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  kx          847 F.... pulseaudio
  CasperMD5CheckResult: pass
  Date: Sat Sep  4 16:43:45 2021
  ExecutablePath: /usr/bin/pulseaudio
  InstallationDate: Installed on 2021-09-04 (0 days ago)
  InstallationMedia: Xubuntu 21.10 "Impish Indri" - Alpha amd64 (20210904)
  ProcCmdline: /usr/bin/pulseaudio --daemonize=no --log-target=journal
  Signal: 11
  SourcePackage: pulseaudio
  StacktraceTop:
   _IceTransClose () from /lib/x86_64-linux-gnu/libICE.so.6
   _IceFreeConnection () from /lib/x86_64-linux-gnu/libICE.so.6
   IceCloseConnection () from /lib/x86_64-linux-gnu/libICE.so.6
   SmcCloseConnection () from /lib/x86_64-linux-gnu/libSM.so.6
   ?? () from /usr/lib/pulse-15.0+dfsg1/modules/module-x11-xsmp.so
  Title: pulseaudio crashed with SIGSEGV in _IceTransClose()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  dmi.bios.date: 12/23/2020
  dmi.bios.release: 1.51
  dmi.bios.vendor: LENOVO
  dmi.bios.version: DKCN51WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: LNVNB161216
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40700 WIN
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo V14-IIL
  dmi.ec.firmware.release: 1.51
  dmi.modalias: 
dmi:bvnLENOVO:bvrDKCN51WW:bd12/23/2020:br1.51:efr1.51:svnLENOVO:pn82C4:pvrLenovoV14-IIL:skuLENOVO_MT_82C4_BU_idea_FM_V14-IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrLenovoV14-IIL:
  dmi.product.family: V14-IIL
  dmi.product.name: 82C4
  dmi.product.sku: LENOVO_MT_82C4_BU_idea_FM_V14-IIL
  dmi.product.version: Lenovo V14-IIL
  dmi.sys.vendor: LENOVO
  separator:

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