** Description changed:

  Hi there,
  
  I've had the recurring problem on multiple 64-bit Ubuntu installations
  on multiple Raspberry Pi 4B's [aarch64/arm64] where libreoffice crashes
  on startup -- this seems to be a persistent bug, as it has happened to
  me on 20.04 LTS (arm64) as well as more recently on 20.10 groovy
  (arm64), whether I've used the official APT packages or the LibreOffice
  Launchpad PPA's.
  
  I've tried looking around for the bug and for example, deleted the
  existing user config etc. -- to no avail.
  
  As for the window manager, I'm running on Xubuntu (Xfce/Xfwm4) and with
  the latest available upstream kernel (5.8.0.1020-raspi), although
  LibreOffice crashing on startup has been a persisting problem on my
  RPi4B Ubuntu installations for quite some time now, probably around a
  half a year or so. Every now and then, as the apt packages get updated,
  LibreOffice actually works (!), so that's kind of odd.
  
  Here's the error message I get (same crash applies for all other
  libreoffice executables that I've tried):
  
  $ libreoffice
  terminate called after throwing an instance of 
'com::sun::star::uno::RuntimeException'
  
  Fatal exception: Signal 6
  Stack:
  /usr/lib/libreoffice/program/libuno_sal.so.3(+0x3c850)[0xffffb3f50850]
  /usr/lib/libreoffice/program/libuno_sal.so.3(+0x3c9ec)[0xffffb3f509ec]
  linux-vdso.so.1(__kernel_rt_sigreturn+0x0)[0xffffb85805d8]
  /lib/aarch64-linux-gnu/libc.so.6(gsignal+0xdc)[0xffffb3d7ce9c]
  /lib/aarch64-linux-gnu/libc.so.6(abort+0xf4)[0xffffb3d6950c]
  
/lib/aarch64-linux-gnu/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x1a8)[0xffffb135f888]
  /lib/aarch64-linux-gnu/libstdc++.so.6(+0x9f1dc)[0xffffb135c1dc]
  /lib/aarch64-linux-gnu/libstdc++.so.6(+0x9f240)[0xffffb135c240]
  /lib/aarch64-linux-gnu/libstdc++.so.6(+0x9f534)[0xffffb135c534]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x116b51c)[0xffffb50f251c]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x116bbc4)[0xffffb50f2bc4]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x116c228)[0xffffb50f3228]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x116ccd4)[0xffffb50f3cd4]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x11709fc)[0xffffb50f79fc]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x2c4b6e0)[0xffffb6bd26e0]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x2c4be68)[0xffffb6bd2e68]
  
/usr/lib/libreoffice/program/libmergedlo.so(_ZN3utl10ConfigItemC2ERKN3rtl8OUStringE14ConfigItemMode+0x78)[0xffffb6bca33c]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x2c905c8)[0xffffb6c175c8]
  
/usr/lib/libreoffice/program/libmergedlo.so(_ZN19SvtSysLocaleOptionsC1Ev+0x124)[0xffffb6c18b54]
  /usr/lib/libreoffice/program/libmergedlo.so(+0x30956a4)[0xffffb701c6a4]
  /usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xd8928)[0xffffad5e0928]
  /usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xda1d4)[0xffffad5e21d4]
  /usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xea218)[0xffffad5f2218]
  /usr/lib/libreoffice/program/libmergedlo.so(_Z7InitVCLv+0x4a0)[0xffffb7029d60]
  
/usr/lib/libreoffice/program/libmergedlo.so(_Z10ImplSVMainv+0xf8)[0xffffb702b468]
  /usr/lib/libreoffice/program/libmergedlo.so(soffice_main+0x9c)[0xffffb5f66f3c]
  /usr/lib/libreoffice/program/soffice.bin(+0x8b4)[0xaaaad806e8b4]
  /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe8)[0xffffb3d69878]
  /usr/lib/libreoffice/program/soffice.bin(+0x904)[0xaaaad806e904]
  
  ________
  
  As for troubleshooting, I've been following i.e. these instructions for
  suggestions on how to try fixing the install [from:
  https://forum.openoffice.org/en/forum/viewtopic.php?f=16&t=53761 ]:
  
  1. Made sure I don't have any existing OpenOffice packages installed
  (ran 'dpkg -l | grep openoffice').
  
  2. Deleted the entire configuration directory ("libreoffice/") under
  "~/.config/".
  
  3. I still can't even run 'libreoffice --help' without getting the same
  error message as otherwise (although with 'libreoffice --help' it's much
  shorter):
  
  terminate called after throwing an instance of
  'com::sun::star::uno::RuntimeException'
  
  ________
  
+ As of now, these are the packages for LibreOffice that I have installed
+ ('dpkg -l | grep libreoffice'):
+ 
+ ii  liblibreoffice-java                                         
1:7.0.3-0ubuntu0.20.10.1                      all          LibreOffice UNO 
runtime environment -- Java library
+ ii  libreoffice                                                 
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite (metapackage)
+ rc  libreoffice-avmedia-backend-gstreamer                       
1:7.0.3-0ubuntu0.20.10.1                      arm64        transitional package 
for GStreamer backend for LibreOffice
+ ii  libreoffice-base                                            
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- database
+ ii  libreoffice-base-core                                       
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- shared library
+ ii  libreoffice-base-drivers                                    
1:7.0.3-0ubuntu0.20.10.1                      arm64        Database 
connectivity drivers for LibreOffice
+ ii  libreoffice-calc                                            
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- spreadsheet
+ ii  libreoffice-common                                          
1:7.0.3-0ubuntu0.20.10.1                      all          office productivity 
suite -- arch-independent files
+ ii  libreoffice-core                                            
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- arch-dependent files
+ rc  libreoffice-dev                                             
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- SDK -- architecture-dependent parts
+ rc  libreoffice-dev-common                                      
1:7.0.3-0ubuntu0.20.10.1                      all          office productivity 
suite -- SDK -- architecture-independent parts
+ ii  libreoffice-draw                                            
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- drawing
+ ii  libreoffice-gnome                                           
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- GNOME integration
+ ii  libreoffice-gtk3                                            
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- GTK+ 3 integration
+ ii  libreoffice-impress                                         
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- presentation
+ ii  libreoffice-java-common                                     
1:7.0.3-0ubuntu0.20.10.1                      all          office productivity 
suite -- arch-independent Java support files
+ ii  libreoffice-math                                            
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- equation editor
+ ii  libreoffice-nlpsolver                                       
0.9+LibO7.0.3-0ubuntu0.20.10.1                all          "Solver for 
Nonlinear Programming" extension for LibreOffice
+ rc  libreoffice-qt5                                             
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- Qt 5 integration
+ ii  libreoffice-report-builder                                  
1:7.0.3-0ubuntu0.20.10.1                      all          LibreOffice 
component for building database reports
+ ii  libreoffice-report-builder-bin                              
1:7.0.3-0ubuntu0.20.10.1                      arm64        LibreOffice 
component for building database reports -- libraries
+ ii  libreoffice-script-provider-bsh                             
1:7.0.3-0ubuntu0.20.10.1                      all          BeanShell script 
support provider for LibreOffice scripting framework
+ ii  libreoffice-script-provider-js                              
1:7.0.3-0ubuntu0.20.10.1                      all          JavaScript script 
support provider for LibreOffice scripting framework
+ ii  libreoffice-script-provider-python                          
1:7.0.3-0ubuntu0.20.10.1                      all          Python script 
support provider for LibreOffice scripting framework
+ ii  libreoffice-sdbc-firebird                                   
1:7.0.3-0ubuntu0.20.10.1                      arm64        Firebird SDBC driver 
for LibreOffice
+ ii  libreoffice-sdbc-mysql                                      
1:7.0.3-0ubuntu0.20.10.1                      arm64        MariaDB/MySQL SDBC 
driver for LibreOffice
+ ii  libreoffice-sdbc-postgresql                                 
1:7.0.3-0ubuntu0.20.10.1                      arm64        PostgreSQL SDBC 
driver for LibreOffice
+ ii  libreoffice-style-colibre                                   
1:7.0.3-0ubuntu0.20.10.1                      all          office productivity 
suite -- colibre symbol style
+ ii  libreoffice-style-elementary                                
1:7.0.3-0ubuntu0.20.10.1                      all          office productivity 
suite -- Elementary symbol style
+ rc  libreoffice-style-tango                                     
1:7.0.3-0ubuntu0.20.10.1                      all          transitional package 
for Tango symbol style
+ ii  libreoffice-style-yaru                                      
1:7.0.3-0ubuntu0.20.10.1                      all          office productivity 
suite -- Yaru symbol style
+ ii  libreoffice-wiki-publisher                                  
1.2.0+LibO7.0.3-0ubuntu0.20.10.1              all          LibreOffice 
extension for working with MediaWiki articles
+ ii  libreoffice-writer                                          
1:7.0.3-0ubuntu0.20.10.1                      arm64        office productivity 
suite -- word processor
+ 
+ ________
+ 
  I've found references to this error message online i.e. at:
  
  1. https://bugs.documentfoundation.org/show_bug.cgi?id=84006
  ... where the bug report has been closed due to "insufficient data", after 
lingering around since at least 2014, and affecting i386/amd64 builds as well.
  
  2. Way more in-depth talk on ArchLinux forums on this:
  https://bbs.archlinux.org/viewtopic.php?id=206869 ("This seems to be a
  java related error, but I have nothing java related installed.") <= I've
  tried some of the suggested solutions over there as well, such as
  setting the environment variable "SAL_USE_VCLPLUGIN=gen".
  
  I do have the libgtk2.0 libraries installed, so that doesn't apply as a
  workaround either -- I've also tried removing libreoffice-related apt
  packages altogether ('sudo apt-get remove libreoffice*') and
  reinstalling, that hasn't helped out either.
  
  The runtime exception seems to be related to the UNO API, as described in 
LibreOffice's documentation:
  https://api.libreoffice.org/docs/idl/ref/RuntimeException_8idl.html
  
  All help to resolve this is kindly appreciated!

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https://bugs.launchpad.net/bugs/1922112

Title:
  libreoffice (var. versions under v.7.x) on arm64, terminate called
  after throwing an instance of 'com::sun::star::uno::RuntimeException'
  \ Fatal exception: Signal 6

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