[Bug 1755281] Re: plymouthd crashed with SIGSEGV in script_obj_deref_direct()

[Apport retracing service]

*** This bug is a duplicate of bug 1745406 ***
    https://bugs.launchpad.net/bugs/1745406

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #1745406, so is being marked as such.  Please
look at the other bug report to see if there is any missing information
that you can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

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** This bug has been marked a duplicate of bug 1745406
   plymouthd crashed with SIGSEGV in script_obj_deref_direct()

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1755281

Title:
  plymouthd crashed with SIGSEGV in script_obj_deref_direct()

Status in plymouth package in Ubuntu:
  New

Bug description:
  Crash report occurred when switching from GNOME on Wayland to GNOME on
  X

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: plymouth 0.9.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  Date: Mon Mar 12 18:17:03 2018
  DefaultPlymouth: /usr/share/plymouth/themes/ubuntu-gnome-logo/ubuntu-gnome-logo.plymouth
  ExecutablePath: /sbin/plymouthd
  InstallationDate: Installed on 2016-10-25 (502 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
  MachineType: MSI MS-7850
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-10-generic.efi.signed root=UUID=de66cbe2-16ea-4c60-9081-ed9a0306f7af ro quiet splash vt.handoff=1
  ProcCmdline: @sbin/plymouthd --mode=boot --pid-file=/run/plymouth/pid --attach-to-session
  ProcEnviron:
   LANG=en_ZA.UTF-8
   LANGUAGE=en_ZA:en
   PATH=(custom, no user)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-10-generic.efi.signed root=UUID=de66cbe2-16ea-4c60-9081-ed9a0306f7af ro quiet splash vt.handoff=1
  SegvAnalysis:
   Segfault happened at: 0x7fec3c52f480 <script_obj_deref_direct>:	cmpl   $0x1,(%rdi)
   PC (0x7fec3c52f480) ok
   source "$0x1" ok
   destination "(%rdi)" (0x00000000) not located in a known VMA region (needed writable region)!
  SegvReason: writing NULL VMA
  Signal: 11
  SourcePackage: plymouth
  StacktraceTop:
   script_obj_deref_direct () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   script_obj_as_custom () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   script_execute_object () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   script_lib_plymouth_on_display_normal () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   ?? () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
  TextPlymouth: /usr/share/plymouth/themes/ubuntu-gnome-text/ubuntu-gnome-text.plymouth
  Title: plymouthd crashed with SIGSEGV in script_obj_deref_direct()
  UpgradeStatus: Upgraded to bionic on 2018-01-24 (47 days ago)
  UserGroups:
   
  dmi.bios.date: 02/16/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V5.9
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: H97 PC Mate(MS-7850)
  dmi.board.vendor: MSI
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MSI
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV5.9:bd02/16/2016:svnMSI:pnMS-7850:pvr1.0:rvnMSI:rnH97PCMate(MS-7850):rvr1.0:cvnMSI:ct3:cvr1.0:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: MS-7850
  dmi.product.version: 1.0
  dmi.sys.vendor: MSI

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