steam error debugged with gdb

err.txt

[New Thread 0xd1df6b40 (LWP 129143)]
Downloading separate debug info for /home/olivia/.local/share/Steam/ubuntu12_32/libopenvr_api.so
[New Thread 0xd1bf4b40 (LWP 129193)]                                                               
Downloading separate debug info for /home/olivia/.local/share/Steam/ubuntu12_32/libaudio.so
[New Thread 0xd1af3b40 (LWP 129194)]                                                               
[New Thread 0xcd2f2b40 (LWP 129195)]
[New Thread 0xe47ffb40 (LWP 129219)]
[New Thread 0xccdffb40 (LWP 129232)]
Failed to init SteamVR because it isn't installed
[New Thread 0xcccfeb40 (LWP 129233)]
Assertion 'device' failed at src/libsystemd/sd-device/device-private.c:103, function device_get_tags_generation(). Aborting.

Thread 49 "CJobMgr::m_Work" received signal SIGABRT, Aborted.
[Switching to Thread 0xdbffeb40 (LWP 129100)]
0xf7fc6579 in __kernel_vsyscall ()
(gdb) backtrace
#0  0xf7fc6579 in __kernel_vsyscall ()
#1  0xf7a894c7 in __pthread_kill_implementation (threadid=threadid@entry=3690982208, 
    signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:43
#2  0xf7a8954f in __pthread_kill_internal (signo=6, threadid=3690982208) at pthread_kill.c:78
#3  0xf7a36717 in __GI_raise (sig=6) at ../sysdeps/posix/raise.c:26
#4  0xf7a1e121 in __GI_abort () at abort.c:79
#5  0xe631476c in log_assert_failed (text=<optimized out>, file=<optimized out>, 
    line=<optimized out>, func=0xe6337608 <__func__.28.lto_priv.3> "device_get_tags_generation")
    at ../systemd-stable/src/basic/log.c:896
#6  0xe631d269 in device_get_tags_generation (device=<optimized out>)
    at ../systemd-stable/src/libsystemd/sd-device/device-private.c:103
#7  device_get_tags_generation (device=<optimized out>)
    at ../systemd-stable/src/libsystemd/sd-device/device-private.c:102
#8  udev_device_get_current_tags_list_entry (udev_device=0xe4de4a30)
    at ../systemd-stable/src/libudev/libudev-device.c:863
#9  0xe7914fb5 in fetch_current_tags (device=0xe4de4d50) at ../libgudev/gudev/gudevdevice.c:146
#10 _g_udev_device_new (udevice=udevice@entry=0xe4de4a30) at ../libgudev/gudev/gudevdevice.c:163
#11 0xe79154af in g_udev_client_query_by_subsystem_and_name (client=0xe4de46e0, 
    subsystem=0xe79c87c8 "net", name=0xd87f8da0 "wlan0") at ../libgudev/gudev/gudevclient.c:511
#12 0xe7956927 in ?? ()
   from /home/olivia/.local/share/Steam/ubuntu12_32/steam-runtime/usr/lib/i386-linux-gnu/libnm.so.0
#13 0xe7957e40 in nm_device_get_vendor ()
   from /home/olivia/.local/share/Steam/ubuntu12_32/steam-runtime/usr/lib/i386-linux-gnu/libnm.so.0
#14 0xd9e0bd9e in ?? () from /home/olivia/.local/share/Steam/ubuntu12_32/steamclient.so
#15 0xd9e0fd57 in ?? () from /home/olivia/.local/share/Steam/ubuntu12_32/steamclient.so
#16 0xd9e10732 in ?? () from /home/olivia/.local/share/Steam/ubuntu12_32/steamclient.so
#17 0xd9e064aa in ?? () from /home/olivia/.local/share/Steam/ubuntu12_32/steamclient.so
#18 0xdac346e9 in ?? () from /home/olivia/.local/share/Steam/ubuntu12_32/steamclient.so
#19 0xe8d4263e in SteamThreadTools::CThread::ThreadExceptionWrapper(void*) ()
   from /home/olivia/.local/share/Steam/ubuntu12_32/libtier0_s.so
#20 0xe8d3fede in ?? () from /home/olivia/.local/share/Steam/ubuntu12_32/libtier0_s.so
#21 0xe8d407a0 in CatchAndWriteMiniDumpExForVoidPtrFn ()
   from /home/olivia/.local/share/Steam/ubuntu12_32/libtier0_s.so
#22 0xe8d407e8 in CatchAndWriteMiniDumpForVoidPtrFn ()
   from /home/olivia/.local/share/Steam/ubuntu12_32/libtier0_s.so
#23 0xe8d45181 in SteamThreadTools::CThread::ThreadProc(void*) ()
   from /home/olivia/.local/share/Steam/ubuntu12_32/libtier0_s.so
#24 0xf7a8721c in start_thread (arg=<optimized out>) at pthread_create.c:444
#25 0xf7b24a9c in clone3 () at ../sysdeps/unix/sysv/linux/i386/clone3.S:111