*** This bug is a duplicate of bug 1748450 ***
    https://bugs.launchpad.net/bugs/1748450

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 #1748450, 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/1761910/+attachment/5104881/+files/CoreDump.gz

** Attachment removed: "Disassembly.txt"
   
https://bugs.launchpad.net/bugs/1761910/+attachment/5104883/+files/Disassembly.txt

** Attachment removed: "ProcMaps.txt"
   
https://bugs.launchpad.net/bugs/1761910/+attachment/5104886/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   
https://bugs.launchpad.net/bugs/1761910/+attachment/5104887/+files/ProcStatus.txt

** Attachment removed: "Registers.txt"
   
https://bugs.launchpad.net/bugs/1761910/+attachment/5104888/+files/Registers.txt

** Attachment removed: "Stacktrace.txt"
   
https://bugs.launchpad.net/bugs/1761910/+attachment/5104889/+files/Stacktrace.txt

** Attachment removed: "ThreadStacktrace.txt"
   
https://bugs.launchpad.net/bugs/1761910/+attachment/5104890/+files/ThreadStacktrace.txt

** This bug has been marked a duplicate of bug 1748450
   gnome-shell crashed with SIGTRAP in _g_log_abort() from 
g_log_default_handler() from default_log_handler(message="Connection to 
xwayland lost") from g_logv() from g_log() from <bug 1505409>

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

-- 
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https://bugs.launchpad.net/bugs/1761910

Title:
  gnome-shell crashed with signal 5 in g_log_default_handler()

Status in gnome-shell package in Ubuntu:
  New

Bug description:
  I plugged in my third display.

  ```
  #!/bin/bash
  echo "setting frame buffer" &&
  xrandr --fb 12800x2880 &&
  echo "setting laptop monitor" &&
  xrandr --output eDP-1-1 --mode 3840x2160 --rate 60 --pos 0x0 --primary &&
  echo "setting 27 inch monitor" &&
  xrandr --output DP-0.2 --mode 2560x1440 --scale-from 5120x2880 --panning 
5120x2880+3840+0 --pos 3840x0 &&
  echo "setting the samsung monitor" &&
  xrandr --output DP-0.1 --mode 1920x1080 --scale-from 3840x2160 --panning 
3840x2160+8960+0 --pos 8960x0 &&
  echo "setting global scaling to 2x" &&
  gsettings set org.gnome.desktop.interface scaling-factor 2
  cat <<EOF >~/.config/monitors.xml
  <monitors version="2">
    <configuration>
      <logicalmonitor>
        <x>3840</x>
        <y>0</y>
        <scale>2</scale>
        <monitor>
          <monitorspec>
            <connector>DP-0.2</connector>
            <vendor>ACI</vendor>
            <product>ASUS PB278</product>
            <serial>F1LMTF085150</serial>
          </monitorspec>
          <mode>
            <width>2560</width>
            <height>1440</height>
            <rate>59.950550079345703</rate>
          </mode>
        </monitor>
      </logicalmonitor>
      <logicalmonitor>
        <x>0</x>
        <y>0</y>
        <scale>2</scale>
        <primary>yes</primary>
        <monitor>
          <monitorspec>
            <connector>eDP-1-1</connector>
            <vendor>MEI</vendor>
            <product>0x96a2</product>
            <serial>0x00000000</serial>
          </monitorspec>
          <mode>
            <width>3840</width>
            <height>2160</height>
            <rate>60.000240325927734</rate>
          </mode>
        </monitor>
      </logicalmonitor>
      <logicalmonitor>
        <x>6400</x>
        <y>0</y>
        <scale>2</scale>
        <monitor>
          <monitorspec>
            <connector>DP-0.1</connector>
            <vendor>SAM</vendor>
            <product>SMBX2231</product>
            <serial>0x5a32504e</serial>
          </monitorspec>
          <mode>
            <width>1920</width>
            <height>1080</height>
            <rate>60</rate>
          </mode>
        </monitor>
      </logicalmonitor>
    </configuration>
  </monitors>
  EOF
  ```

  is my display configuration. Three screens. Third is problematic in
  Linux.

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.0-0ubuntu3
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: GNOME-Greeter:GNOME
  Date: Fri Apr  6 18:41:52 2018
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  GsettingsChanges:
   
  InstallationDate: Installed on 2018-03-28 (9 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180325)
  ProcCmdline: /usr/bin/gnome-shell
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/false
  Signal: 5
  SourcePackage: gnome-shell
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_log_default_handler () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? ()
   g_logv () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_log () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  Title: gnome-shell crashed with signal 5 in g_log_default_handler()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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