I’m actually not sure if this is LWJGL or not, but I was playing around in LibGDX and XCB put out this error while trying to close the window.
[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.
java: ../../src/xcb_io.c:179: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.
I’m on Linux (hence the Xserver error).
I’ll put this on the LWJGL bug tracker if anyone else has experienced this, or if it’s just me. There was an error in my GLSL code, which made the JVM spit out a stacktrace telling me about it, for the record…