(gdb) run
Starting program: /home/user1/dev/lovr/second_touch/build/bin/lovr

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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
lovr: /usr/src/debug/glfw/glfw-3.4/src/window.c:868: glfwGetWindowAttrib: Assertion `window != NULL' failed.

Program received signal SIGABRT, Aborted.
__pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
44       return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;
(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1  0x00007ffff72a5463 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:78
#2  0x00007ffff724c120 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3  0x00007ffff72334c3 in __GI_abort () at abort.c:79
#4  0x00007ffff72333df in __assert_fail_base (fmt=0x7ffff73c3c20 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7ffff7f6b03c "window != NULL",
    file=file@entry=0x7ffff7f6e7c8 "/usr/src/debug/glfw/glfw-3.4/src/window.c", line=line@entry=868, function=function@entry=0x7ffff7f8be50 <__PRETTY_FUNCTION__.15.lto_priv.1> "glfwGetWindowAttrib")
    at assert.c:94
#5  0x00007ffff7244177 in __assert_fail (assertion=assertion@entry=0x7ffff7f6b03c "window != NULL", file=file@entry=0x7ffff7f6e7c8 "/usr/src/debug/glfw/glfw-3.4/src/window.c", line=line@entry=868,
    function=function@entry=0x7ffff7f8be50 <__PRETTY_FUNCTION__.15.lto_priv.1> "glfwGetWindowAttrib") at assert.c:103
#6  0x00007ffff7f52758 in glfwGetWindowAttrib (handle=<optimized out>, attrib=<optimized out>) at /usr/src/debug/glfw/glfw-3.4/src/window.c:868
#7  0x0000555555922aa0 in os_window_is_focused ()
#8  0x00005555558eb5d5 in simulator_init ()
#9  0x00005555558d3a11 in lovrHeadsetInit ()
#10 0x00005555558d81d6 in luaopen_lovr_headset ()
#11 0x00007ffff7f27836 in lj_BC_FUNCC () from libluajit.so
#12 0x00007ffff7e995fe in lua_call () from libluajit.so
#13 0x00007ffff7e8c4c3 in lj_cf_package_require () from libluajit.so
#14 0x00007ffff7f27836 in lj_BC_FUNCC () from libluajit.so
#15 0x00007ffff7e99c7a in lua_resume () from libluajit.so
#16 0x00005555557cbbda in luax_resume ()
#17 0x00005555557ce0cd in main ()