wrapper-2.0 crashed with SIGSEGV in g_slice_free_chain_with_offset()

[H I Murphy]

I had just opened Settings>Display when the dialog box appeared informing me of a problem and did I wish to report it.

Linux kabiniX 5.0.0-7-generic #8-Ubuntu SMP Mon Mar 4 16:27:25 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Disco Dingo (development branch)
Release: 19.04
Codename: disco
XFCE

apt-cache policy xfce4-panel
xfce4-panel:
  Installed: 4.13.4-1
  Candidate: 4.13.4-1
  Version table:
 *** 4.13.4-1 500
        500 http://us.archive.ubuntu.com/ubuntu disco/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
DistroRelease: Ubuntu 19.04
Package: libxfce4panel-2.0-4 4.13.4-1
ProcVersionSignature: Ubuntu 5.0.0-7.8-generic 5.0.0
Uname: Linux 5.0.0-7-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
CrashCounter: 1
CurrentDesktop: XFCE
Date: Tue Apr 2 19:24:09 2019
ExecutablePath: /usr/lib/x86_64-linux-gnu/xfce4/panel/wrapper-2.0
InstallationDate: Installed on 2019-03-18 (15 days ago)
InstallationMedia: Xubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190317)
JournalErrors:
 -- Logs begin at Mon 2019-03-18 21:47:42 EDT, end at Tue 2019-04-02 19:07:36 EDT. --
 Apr 02 17:55:30 hostname spice-vdagent[1702]: Cannot access vdagent virtio channel /dev/virtio-ports/com.redhat.spice.0
 Apr 02 17:57:42 hostname gnome-keyring-daemon[1471]: asked to register item /org/freedesktop/secrets/collection/login/1, but it's already registered
 Apr 02 17:57:46 hostname gnome-keyring-daemon[1471]: asked to register item /org/freedesktop/secrets/collection/login/1, but it's already registered
ProcCmdline: /usr/lib/x86_64-linux-gnu/xfce4/panel/wrapper-2.0 /usr/lib/x86_64-linux-gnu/xfce4/panel/plugins/libwhiskermenu.so 1 10485767 whiskermenu Whisker\ Menu Show\ a\ menu\ to\ easily\ access\ installed\ applications
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f1752869c50: mov (%rsi),%rax
 PC (0x7f1752869c50) ok
 source "(%rsi)" (0x00000001) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: xfce4-panel
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_slice_free_chain_with_offset () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libgtk-3.so.0
 g_list_foreach () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_list_free_full () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: wrapper-2.0 crashed with SIGSEGV in g_slice_free_chain_with_offset()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
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[Apport retracing service (apport)]

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 #1821457, 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.