=> 0x43dae8 <copy_word_list+24>:	mov    0x8(%rbx),%rdi
   0x43daec <copy_word_list+28>:	callq  0x43d8d0 <copy_word>
   0x43daf1 <copy_word_list+33>:	mov    %rbp,%rsi
   0x43daf4 <copy_word_list+36>:	mov    %rax,%rdi
   0x43daf7 <copy_word_list+39>:	callq  0x42dfb0 <make_word_list>
   0x43dafc <copy_word_list+44>:	mov    (%rbx),%rbx
   0x43daff <copy_word_list+47>:	mov    %rax,%rbp
   0x43db02 <copy_word_list+50>:	test   %rbx,%rbx
   0x43db05 <copy_word_list+53>:	jne    0x43dae8 <copy_word_list+24>
   0x43db07 <copy_word_list+55>:	test   %rbp,%rbp
   0x43db0a <copy_word_list+58>:	je     0x43db28 <copy_word_list+88>
   0x43db0c <copy_word_list+60>:	cmpq   $0x0,0x0(%rbp)
   0x43db11 <copy_word_list+65>:	je     0x43db28 <copy_word_list+88>
   0x43db13 <copy_word_list+67>:	add    $0x8,%rsp
   0x43db17 <copy_word_list+71>:	mov    %rbp,%rdi
   0x43db1a <copy_word_list+74>:	xor    %eax,%eax