#0  __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:31
No locals.
#1  0x00007f2a68f9b816 in __GI___strdup (s=0x0) at strdup.c:41
        len = <optimized out>
        new = <optimized out>
#2  0x000000000040f231 in ?? ()
No symbol table info available.
#3  0x00000000004122a0 in ?? ()
No symbol table info available.
#4  0x0000000000464dd8 in ?? ()
No symbol table info available.
#5  0x0000000000406cd1 in ?? ()
No symbol table info available.
#6  0x00007f2a68f33de5 in __libc_start_main (main=0x406bc0, argc=3, ubp_av=0x7fff104df408, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff104df3f8) at libc-start.c:260
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -6386388396723058845, 4222340, 140733466932224, 0, 0, 6386347319813818211, 6415989481049900899}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x46a160, 0x7fff104df408}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4628832}}}
        not_first_call = <optimized out>
#7  0x0000000000406dad in ?? ()
No symbol table info available.