glfw callstack

Thread 1 (Thread 0x7fc7fd77d7c0 (LWP 860)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fc7f94bc352 in __libc_calloc (n=<optimized out>, elem_size=<optimized out>) at malloc.c:3407
#2  0x00007fc7fc3ea2b2 in ?? () from /usr/lib/x86_64-linux-gnu/libGL.so.1
#3  0x00007fc7f7cae48c in ?? () from /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.107
#4  0x00007fc7f7cb3cb7 in ?? () from /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.107
#5  0x00007fc7f7ca49e8 in ?? () from /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.107
#6  0x00007fc7f7d1304e in ?? () from /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.107
#7  0x00007fc7f7d1357e in ?? () from /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.107
#8  0x00007fc7f7cf8cce in ?? () from /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.107
#9  0x00007fc7f7cf939c in ?? () from /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.107
#10 0x00007fc7fc3e1dff in ?? () from /usr/lib/x86_64-linux-gnu/libGL.so.1
#11 0x00007fc7fc3bb3f8 in glXSwapBuffers () from /usr/lib/x86_64-linux-gnu/libGL.so.1
#12 0x00000000006562f0 in glfwSwapBuffers ()
#13 0x000000000063f035 in Rend::RendAPI::present() ()
#14 0x00000000005d8894 in graph::SceneGraph::render(graph::Context*) ()
#15 0x00000000005d8a81 in graph::SceneGraph::doFrame(graph::Context*) ()
#16 0x00000000005c6220 in graph::ControllerImpl::msg_doFrame(unsigned int, void*) ()
#17 0x00000000005c218f in graph::ControllerImpl::message(unsigned int, void*) ()
#18 0x000000000042050a in process() ()
#19 0x000000000041903b in main ()