=> 0x7fc65d1d8699 <as_ref_string_unref+9>:	mov    -0x4(%rdi),%eax
   0x7fc65d1d869c <as_ref_string_unref+12>:	test   %eax,%eax
   0x7fc65d1d869e <as_ref_string_unref+14>:	js     0x7fc65d1d86a7 <as_ref_string_unref+23>
   0x7fc65d1d86a0 <as_ref_string_unref+16>:	lock subl $0x1,-0x4(%rdi)
   0x7fc65d1d86a5 <as_ref_string_unref+21>:	je     0x7fc65d1d86d0 <as_ref_string_unref+64>
   0x7fc65d1d86a7 <as_ref_string_unref+23>:	mov    %rbx,%rax
   0x7fc65d1d86aa <as_ref_string_unref+26>:	pop    %rbx
   0x7fc65d1d86ab <as_ref_string_unref+27>:	retq   
   0x7fc65d1d86ac <as_ref_string_unref+28>:	nopl   0x0(%rax)
   0x7fc65d1d86b0 <as_ref_string_unref+32>:	lea    0x13019(%rip),%rdx        # 0x7fc65d1eb6d0
   0x7fc65d1d86b7 <as_ref_string_unref+39>:	lea    0x130c2(%rip),%rsi        # 0x7fc65d1eb780
   0x7fc65d1d86be <as_ref_string_unref+46>:	lea    0xfc8e(%rip),%rdi        # 0x7fc65d1e8353
   0x7fc65d1d86c5 <as_ref_string_unref+53>:	callq  0x7fc65d1be3e0 <g_return_if_fail_warning@plt>
   0x7fc65d1d86ca <as_ref_string_unref+58>:	mov    %rbx,%rax
   0x7fc65d1d86cd <as_ref_string_unref+61>:	pop    %rbx
   0x7fc65d1d86ce <as_ref_string_unref+62>:	retq