Public bug reported:

There seems to be a bug when running i386 games using SDL on amd64
Ubuntu 18.04.
https://www.gog.com/forum/xenonauts/ubuntu_1804_lts_bionic_beaver_dbus_error_solution
suggests installing the 16.04 version of SDL instead as a workaround.

The error seems to be as follows:

./Xenonauts/start.sh
Running Xenonauts
dbus[9584]: 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

ltrace-ing the executable ends with these lines:

SDL_SetHint(0x8a33717, 0x8a41397, 0xffaedcc8, 0x82590d0) = 1
SDL_GetNumVideoDisplays(0x8a33717, 0x8a41397, 0xffaedcc8, 0x82590d0) = 0
SDL_Init(32, 0x8a41397, 0xffaedcc8, 0x82590d0dbus[10001]: 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
 <no return ...>
--- SIGABRT (Aborted) ---
+++ killed by SIGABRT +++

This happens every time, so I can replicate it and provide more
information if required.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: libsdl2-2.0-0:i386 2.0.8+dfsg1-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
CurrentDesktop: MATE
Date: Mon Jun  4 21:02:40 2018
InstallationDate: Installed on 2014-04-07 (1519 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
PackageArchitecture: i386
SourcePackage: libsdl2
UpgradeStatus: Upgraded to bionic on 2018-04-28 (37 days ago)

** Affects: libsdl2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug bionic i386

** Description changed:

  There seems to be a bug when running i386 games using SDL on amd64
  Ubuntu 18.04.
  
https://www.gog.com/forum/xenonauts/ubuntu_1804_lts_bionic_beaver_dbus_error_solution
  suggests installing the 16.04 version of SDL instead as a workaround.
  
  The error seems to be as follows:
  
- /Xenonauts/start.sh 
+ ./Xenonauts/start.sh
  Running Xenonauts
  dbus[9584]: 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
+   D-Bus not built with -rdynamic so unable to print a backtrace
  
  ltrace-ing the executable ends with these lines:
  
  SDL_SetHint(0x8a33717, 0x8a41397, 0xffaedcc8, 0x82590d0) = 1
  SDL_GetNumVideoDisplays(0x8a33717, 0x8a41397, 0xffaedcc8, 0x82590d0) = 0
  SDL_Init(32, 0x8a41397, 0xffaedcc8, 0x82590d0dbus[10001]: 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
-  <no return ...>
+   D-Bus not built with -rdynamic so unable to print a backtrace
+  <no return ...>
  --- SIGABRT (Aborted) ---
  +++ killed by SIGABRT +++
  
  This happens every time, so I can replicate it and provide more
  information if required.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: libsdl2-2.0-0:i386 2.0.8+dfsg1-1ubuntu1
  ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
  Uname: Linux 4.15.0-22-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.1
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Mon Jun  4 21:02:40 2018
  InstallationDate: Installed on 2014-04-07 (1519 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 
(20131016.1)
  PackageArchitecture: i386
  SourcePackage: libsdl2
  UpgradeStatus: Upgraded to bionic on 2018-04-28 (37 days ago)

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https://bugs.launchpad.net/bugs/1775067

Title:
  D-Bus bug in 18.04 i386 SDL: arguments to
  dbus_message_new_method_call() were incorrect, assertion "path !=
  NULL" failed

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