[Bug 1831349] Re: apport-gtk crashes with SIGSEGV if invalid DISPLAY given

[Apport retracing service]

*** This bug is a duplicate of bug 1552577 ***
    https://bugs.launchpad.net/bugs/1552577

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 #1552577, 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.

** Attachment removed: "CoreDump.gz"
   https://bugs.launchpad.net/bugs/1831349/+attachment/5268329/+files/CoreDump.gz

** Attachment removed: "Disassembly.txt"
   https://bugs.launchpad.net/bugs/1831349/+attachment/5268331/+files/Disassembly.txt

** Attachment removed: "ProcMaps.txt"
   https://bugs.launchpad.net/bugs/1831349/+attachment/5268335/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   https://bugs.launchpad.net/bugs/1831349/+attachment/5268336/+files/ProcStatus.txt

** Attachment removed: "Registers.txt"
   https://bugs.launchpad.net/bugs/1831349/+attachment/5268337/+files/Registers.txt

** Attachment removed: "Stacktrace.txt"
   https://bugs.launchpad.net/bugs/1831349/+attachment/5268338/+files/Stacktrace.txt

** Attachment removed: "ThreadStacktrace.txt"
   https://bugs.launchpad.net/bugs/1831349/+attachment/5268339/+files/ThreadStacktrace.txt

** This bug has been marked a duplicate of bug 1552577
   apport-gtk crashed with SIGSEGV in _gtk_style_provider_private_get_settings(provider=0x0) [gtkstyleproviderprivate.c:123]

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1831349

Title:
  apport-gtk crashes with SIGSEGV if invalid DISPLAY given

Status in apport package in Ubuntu:
  New

Bug description:
  Running 
    DISPLAY=-1 ubuntu-bug somepackage
  prints
    Unable to init server: Could not connect: Connection refused
    Unable to init server: Could not connect: Connection refused
    Segmentation fault (core dumped)
  and apport stops working.

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: apport-gtk 2.20.9-0ubuntu7.6
  ProcVersionSignature: Ubuntu 5.0.0-15.16~18.04.1-generic 5.0.6
  Uname: Linux 5.0.0-15-generic x86_64
  ApportLog:
   ERROR: apport (pid 5603) Sun Jun  2 01:09:25 2019: called for pid 5601, signal 11, core limit 0, dump mode 1
   ERROR: apport (pid 5603) Sun Jun  2 01:09:25 2019: script: /usr/share/apport/apport-gtk, interpreted by /usr/bin/python3.6 (command line "/usr/bin/python3 /usr/share/apport/apport-gtk firefox")
   ERROR: apport (pid 5603) Sun Jun  2 01:09:25 2019: debug: session gdbus call: (true,)
   
   ERROR: apport (pid 5603) Sun Jun  2 01:09:28 2019: wrote report /var/crash/_usr_share_apport_apport-gtk.1000.crash
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  CrashReports:
   640:1000:120:7086798:2019-06-02 01:09:27.912482976 +0200:2019-06-02 01:09:28.912482976 +0200:/var/crash/_usr_share_apport_apport-gtk.1000.crash
   664:1000:120:0:2019-06-01 08:56:03.472304200 +0200:2019-06-01 08:56:03.472304200 +0200:/var/crash/_usr_lib_chromium-browser_chromium-browser.1000.upload
   640:1000:120:39799435:2019-06-01 08:55:52.336284875 +0200:2019-06-01 08:55:53.336284875 +0200:/var/crash/_usr_lib_chromium-browser_chromium-browser.1000.crash
   600:111:120:0:2019-06-01 08:56:59.784414481 +0200:2019-06-01 08:56:59.784414481 +0200:/var/crash/_usr_lib_chromium-browser_chromium-browser.1000.uploaded
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Jun  2 01:09:25 2019
  ExecutablePath: /usr/share/apport/apport-gtk
  InterpreterPath: /usr/bin/python3.6
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/share/apport/apport-gtk firefox
  Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
  SegvAnalysis:
   Segfault happened at: 0x7fd54c9acff9:	mov    (%rbx),%rdi
   PC (0x7fd54c9acff9) ok
   source "(%rbx)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%rdi" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: apport
  StacktraceTop:
   () at /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
   () at /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
   () at /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
   () at /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
   () at /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
  Title: apport-gtk crashed with SIGSEGV
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip fax libvirt libvirtd lpadmin lxd plugdev sambashare sudo users vboxusers

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