mate-panel crashed with SIGSEGV in g_type_check_instance_is_fundamentally_a()

[Josh Ozooda]

krunner. I purged libkf5runner5, mate-desktop. reinstalled mate desktop. could not login via login page. Login page stalled. Cntl,alt,f1- starx for desktop.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: mate-panel 1.12.2-1
Uname: Linux 4.6.0-040600rc2-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: MATE
Date: Wed Apr 13 13:49:08 2016
ExecutablePath: /usr/bin/mate-panel
InstallationDate: Installed on 2016-04-12 (1 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323.1)
ProcCmdline: mate-panel
SegvAnalysis:
 Segfault happened at: 0x7f21dc42d7e5 <g_type_check_instance_is_fundamentally_a+5>: mov (%rdi),%rax
 PC (0x7f21dc42d7e5) ok
 source "(%rdi)" (0x00000006) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: mate-panel
StacktraceTop:
 g_type_check_instance_is_fundamentally_a () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? ()
 g_simple_async_result_complete () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 ?? ()
Title: mate-panel crashed with SIGSEGV in g_type_check_instance_is_fundamentally_a()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[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 #1371069, 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.