@Brian I tried to debug this by issuing the -g option to apport retrace, which gives me: Calling gdb command: /usr/bin/gdb --ex 'set debug-file-directory /tmp/apport_sandbox_rih8yvfy/usr/lib/debug' --ex 'set solib-absolute-prefix /tmp/apport_sandbox_rih8yvfy' --ex 'add-auto-load-safe-path /tmp/apport_sandbox_rih8yvfy' --ex 'set solib-search-path /tmp/apport_sandbox_rih8yvfy/lib/x86_64-linux-gnu:/tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu' --ex 'file "/tmp/apport_sandbox_rih8yvfy//usr/bin/texstudio"' --ex 'core-file /tmp/apport_core_gmg4gf7g' GNU gdb (Ubuntu 9.1-0ubuntu1) 9.1 Copyright (C) 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word". Reading symbols from /tmp/apport_sandbox_rih8yvfy//usr/bin/texstudio... Reading symbols from /tmp/apport_sandbox_rih8yvfy/usr/lib/debug/.build-id/90/1b4c734e207fe3bfc4d5d7ed4d0baab80b42f2.debug... [New LWP 138768] warning: Could not load shared library symbols for 11 libraries, e.g. /lib/x86_64-linux-gnu/libz.so.1. Use the "info sharedlibrary" command to see the complete listing. Do you need "set solib-search-path" or "set sysroot"? could not find '.gnu_debugaltlink' file for /tmp/apport_sandbox_rih8yvfy/usr/lib/debug/.build-id/60/afa9bc5fc9c30d79801655716b91d871f75d33.debug Core was generated by `texstudio'. Program terminated with signal SIGABRT, Aborted. #0 0x00007fa95a8273eb in ?? () (gdb) Please note the warnings printed here, there is even a bug report from you associated with one of the warnings: https://bugs.launchpad.net/ubuntu/+source/gdb/+bug/1818918 (gdb) info sharedlibrary From To Syms Read Shared Object Library 0x00007fa95c59e0c0 0x00007fa95c6274f6 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libX11.so.6.3.0 0x00007fa95c55f460 0x00007fa95c5799c9 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libquazip5.so.1.0.0 No /lib/x86_64-linux-gnu/libz.so.1 0x00007fa95c4ca4d0 0x00007fa95c508483 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libhunspell-1.7.so.0.0.1 0x00007fa95c46d6d0 0x00007fa95c4a98e7 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libpoppler-qt5.so.1.22.0 0x00007fa95c3efe00 0x00007fa95c423a28 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5PrintSupport.so.5.12.5 0x00007fa95be89700 0x00007fa95c23b029 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.12.5 0x00007fa95b81f030 0x00007fa95bc31576 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5.12.5 0x00007fa95b5c0970 0x00007fa95b6e7a69 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5Network.so.5.12.5 0x00007fa95b54edc0 0x00007fa95b572f7f Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5Xml.so.5.12.5 0x00007fa95b2d3c40 0x00007fa95b4b9d99 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5Script.so.5.12.5 --Type for more, q to quit, c to continue without paging-- 0x00007fa95b28d460 0x00007fa95b28f549 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5Concurrent.so.5.12.5 0x00007fa95adc42c0 0x00007fa95b0a1be2 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libQt5Core.so.5.12.5 No /lib/x86_64-linux-gnu/libpthread.so.0 0x00007fa95abda1a0 0x00007fa95acc17d2 Yes (*) /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.28 No /lib/x86_64-linux-gnu/libm.so.6 No /lib/x86_64-linux-gnu/libgcc_s.so.1 No /lib/x86_64-linux-gnu/libc.so.6 0x00007fa95a7c0620 0x00007fa95a7d3609 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0 No /lib/x86_64-linux-gnu/libdl.so.2 No /lib64/ld-linux-x86-64.so.2 0x00007fa95a564660 0x00007fa95a6c9b42 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libpoppler.so.95.0.0 0x00007fa95a3bb790 0x00007fa95a43a215 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libfreetype.so.6.17.1 --Type for more, q to quit, c to continue without paging-- 0x00007fa95a36a1c0 0x00007fa95a36d01d Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libGL.so.1.7.0 0x00007fa95a2f2510 0x00007fa95a31629d Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libpng16.so.16.37.0 0x00007fa95a1f1c70 0x00007fa95a2b8182 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libharfbuzz.so.0.20600.4 0x00007fa959fd7ae0 0x00007fa95a14efbb Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libicui18n.so.65.1 0x00007fa959d6a920 0x00007fa959e4e717 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libicuuc.so.65.1 0x00007fa959c842c0 0x00007fa959cdae29 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libpcre2-16.so.0.9.0 0x00007fa959c6c1a0 0x00007fa959c77170 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libdouble-conversion.so.3.1 0x00007fa959b5eb40 0x00007fa959be0b42 Yes (*) /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0 0x00007fa959b3c360 0x00007fa959b3d052 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libXau.so.6.0.0 0x00007fa959b351a0 0x00007fa959b36a03 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0 0x00007fa959af4800 0x00007fa959b173da Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libfontconfig.so.1.12.0 0x00007fa959a6a540 0x00007fa959aad469 Yes /tmp/apport_sandbox_rih8yvfy--Type for more, q to quit, c to continue without paging-- /usr/lib/x86_64-linux-gnu/libjpeg.so.8.2.2 0x00007fa959a13530 0x00007fa959a53917 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libopenjp2.so.2.3.1 0x00007fa9599be6c0 0x00007fa9599f4a51 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/liblcms2.so.2.0.8 0x00007fa95993ce60 0x00007fa95997fc65 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libtiff.so.5.5.0 0x00007fa9597fe370 0x00007fa9598eb778 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libnss3.so 0x00007fa9597bf8e0 0x00007fa9597d8792 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libsmime3.so 0x00007fa95977ea80 0x00007fa95979fcf3 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libnspr4.so 0x00007fa9596fb240 0x00007fa9596fd4eb Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libGLdispatch.so.0.0.0 0x00007fa95968a700 0x00007fa9596a448c Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libGLX.so.0.0.0 0x00007fa95965d280 0x00007fa95967e182 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libgraphite2.so.3.2.1 0x00007fa957ba8040 0x00007fa957ba80f9 Yes (*) /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libicudata.so.65.1 No /lib/x86_64-linux-gnu/libpcre.so.3 --Type for more, q to quit, c to continue without paging-- 0x00007fa957b1be40 0x00007fa957b29e69 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libbsd.so.0.10.0 No /lib/x86_64-linux-gnu/libexpat.so.1 No /lib/x86_64-linux-gnu/libuuid.so.1 0x00007fa957879070 0x00007fa9578ca1d4 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libwebp.so.6.0.2 0x00007fa9577d0240 0x00007fa957861d0a Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libzstd.so.1.4.4 No /lib/x86_64-linux-gnu/liblzma.so.5 0x00007fa9575980a0 0x00007fa9575a05b5 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libjbig.so.0 0x00007fa957570a30 0x00007fa95758111c Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libnssutil3.so 0x00007fa95755f300 0x00007fa9575609e2 Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libplc4.so 0x00007fa957559120 0x00007fa957559ddc Yes /tmp/apport_sandbox_rih8yvfy/usr/lib/x86_64-linux-gnu/libplds4.so (*): Shared library is missing debugging information.