Sometimes I'll see this on trying to launch mame:
/| /| /| /| /| _______
/ | / | / | / | / | / /
/ |/ | / | / |/ | / ____/
/ | / | / | / /_
/ |/ | / |/ __/
/ /| /| /| |/ /| /| /____
/ / | / | / | / | / | /
/ _/ |/ / / |___/ |/ /_______/
/ /
/ _/
mame 0.236
Copyright (C) Nicola Salmoria and the MAME team
Lua 5.3
Copyright (C) Lua.org, PUC-Rio
dbus[2234616]: arguments to dbus_message_new_method_call() were incorrect, assertion "path != NULL" failed in file ../../../dbus/dbus-message.c line 1362.
This is normally a bug in some application using the D-Bus library.
D-Bus not built with -rdynamic so unable to print a backtrace
Aborted (core dumped)
coredumpctl debug
Message: Process 2234616 (mame) of user 1000 dumped core.
Stack trace of thread 2234616:
#0 0x00007f9fcc95318b __GI_raise (libc.so.6 + 0x4618b)
#1 0x00007f9fcc932859 __GI_abort (libc.so.6 + 0x25859)
#2 0x00007f9fcbeaeed2 n/a (libdbus-1.so.3 + 0xbed2)
#3 0x00007f9fcbed1570 _dbus_warn_check_failed (libdbus-1.so.3 + 0x2e570)
#4 0x00007f9fcbec0e52 dbus_message_new_method_call (libdbus-1.so.3 + 0x1de52)
#5 0x00007f9fce4a8722 n/a (libSDL2-2.0.so.0 + 0xeb722)
#6 0x00007f9fce4a9259 n/a (libSDL2-2.0.so.0 + 0xec259)
#7 0x00007f9fce4aa076 n/a (libSDL2-2.0.so.0 + 0xed076)
#8 0x00007f9fce4aa1d5 n/a (libSDL2-2.0.so.0 + 0xed1d5)
#9 0x00007f9fce4a9697 n/a (libSDL2-2.0.so.0 + 0xec697)
#10 0x00007f9fce49665f n/a (libSDL2-2.0.so.0 + 0xd965f)
#11 0x00007f9fce49d45b n/a (libSDL2-2.0.so.0 + 0xe045b)
#12 0x00007f9fce46ff6b n/a (libSDL2-2.0.so.0 + 0xb2f6b)
#13 0x00007f9fce3df8e7 n/a (libSDL2-2.0.so.0 + 0x228e7)
#14 0x00005633534052fa _ZN17sdl_osd_interface4initER15running_machine (mame + 0x973c2fa)
#15 0x00005633573faee1 _ZN15running_machine5startEv (mame + 0xd731ee1)
#16 0x00005633573fce4e _ZN15running_machine3runEb (mame + 0xd733e4e)
#17 0x0000563353502339 _ZN20mame_machine_manager7executeEv (mame + 0x9839339)
#18 0x00005633535b3c7e _ZN12cli_frontend15start_executionEP20mame_machine_managerRKSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS8_EE (mame + 0x98eac7e)
#19 0x00005633535b3f12 _ZN12cli_frontend7executeERSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS6_EE (mame + 0x98eaf12)
#20 0x00005633534ffd7a _ZN13emulator_info14start_frontendER11emu_optionsR13osd_interfaceRSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaISA_EE (mame + 0x9836d7a)
#21 0x000056334e7ff07f main (mame + 0x4b3607f)
#22 0x00007f9fcc9340b3 __libc_start_main (libc.so.6 + 0x270b3)
#23 0x000056334e8ec50e _start (mame + 0x4c2350e)
It's not that big of a deal, I just try again and it will launch without issue.
lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
I see that other apps will see this with SDL:
https://bugs.launchpad.net/ubuntu/+source/libsdl2/+bug/1775067