#0  0x00007fd3538834ce in pthread_join () at /usr/lib/libpthread.so.0
#1  0x00007fd3388630e0 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007fd338863148 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007fd352fec298 in __run_exit_handlers () at /usr/lib/libc.so.6
#4  0x00007fd352fec2ea in  () at /usr/lib/libc.so.6
#5  0x0000000000448c76 in  ()
#6  0x00007fd3329d7b13 in  () at
/usr/lib/enlightenment/modules/lokker/linux-gnu-x86_64-ver-0.21/module.so
#7  0x00007fd3329d7ea5 in  () at
/usr/lib/enlightenment/modules/lokker/linux-gnu-x86_64-ver-0.21/module.so
#8  0x00007fd353d2d8e1 in  () at /usr/lib/libecore.so.1
#9  0x00007fd353d35170 in  () at /usr/lib/libecore.so.1
#10 0x00007fd353d355d7 in ecore_main_loop_begin () at /usr/lib/libecore.so.1
#11 0x000000000043e2fb in  ()
#12 0x00007fd352fd643a in __libc_start_main () at /usr/lib/libc.so.6
#13 0x000000000043f1da in _start ()

This crash happens when trying to unlock enlightenment. According to the E devs
its a forked child that doesn't exec.

Arch linux, latest everything from the repos.