crashes when using threads

[kennyrkun]

threadmanager constructed
Launching with 1 arguments:
0: ./kunlauncher

aman
AppEngine Init
IntialiseState Init
failed to load provided arial, falling back to windows Arial!
Failed to load font "C://Windows//Fonts//Arial.ttf" (failed to create the font face)
failed to load a font!
TASK: You can't see me!
thread launched
[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
kunlauncher: ../../src/xcb_io.c:165: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.