# Pastebin EFv5i0R8
(gdb) bt full
#0  0x00007ffff749e8b7 in do_fcntl (arg=<optimized out>, cmd=7, fd=13) at ../sysdeps/unix/sysv/linux/fcntl.c:31
        resultvar = 18446744073709551104
#1  __GI___libc_fcntl (fd=<optimized out>, cmd=<optimized out>) at ../sysdeps/unix/sysv/linux/fcntl.c:71
        ap = {{gp_offset = 16, fp_offset = 0, overflow_arg_area = 0x7fffffffdcb0, reg_save_area = 0x7fffffffdc70}}
        arg = <optimized out>
        oldtype = <optimized out>
#2  0x00007ffff78fecb3 in lock () from /home/jrusso/.rakudobrew/moar-nom/install/lib/libmoar.so
No symbol table info available.
#3  0x00007ffff78fdbf9 in MVM_io_lock () from /home/jrusso/.rakudobrew/moar-nom/install/lib/libmoar.so
No symbol table info available.
#4  0x00007ffff78cb800 in MVM_interp_run () from /home/jrusso/.rakudobrew/moar-nom/install/lib/libmoar.so
No symbol table info available.
#5  0x00007ffff798c261 in MVM_vm_run_file () from /home/jrusso/.rakudobrew/moar-nom/install/lib/libmoar.so
No symbol table info available.
#6  0x00000000004010bb in main ()
No symbol table info available.