Comment 2 for bug 1320462

StacktraceTop:
 __assert_fail_base (fmt=0x7f563c1a6fea <error: Cannot access memory at address 0x7f563c1a6fea>, assertion=assertion@entry=0x7f5635113628 "!xcb_xlib_too_much_data_requested", file=file@entry=0x7f56351131db "../../src/xcb_io.c", line=line@entry=736, function=function@entry=0x7f5635113650 <__PRETTY_FUNCTION__.14502> "_XRead") at assert.c:92
 __GI___assert_fail (assertion=assertion@entry=0x7f5635113628 "!xcb_xlib_too_much_data_requested", file=file@entry=0x7f56351131db "../../src/xcb_io.c", line=line@entry=736, function=function@entry=0x7f5635113650 <__PRETTY_FUNCTION__.14502> "_XRead") at assert.c:101
 _XRead (dpy=0x16d30a0, data=<optimized out>, size=<optimized out>) at ../../src/xcb_io.c:735
 ?? () from /tmp/apport_sandbox_k7c21J/usr/lib/nvidia-331/libGL.so.1
 (anonymous namespace)::Resolver<QOpenGLFunctionsPrivate, void (*)(int, unsigned int*), 3, void>::operator()<int, unsigned int*> (this=this@entry=0x7fff83805c20, p1=p1@entry=1, p2=p2@entry=0x1cf08b0) at opengl/qopenglfunctions.cpp:1766