bug#9498: "Not an in-range integer,..." when using Synergy

[Yoshiaki Kasahara]

On Wed, 14 Sep 2011 04:31:47 -0400,
        Eli Zaretskii <eliz@gnu.org> said:

> Thanks.  Please do
> 
>  (gdb) frame 1
>  (gdb) p val
>  (gdb) pp c
>  (gdb) up
>  (gdb) pp obj
> 
> and show the output.
> 
> In order for the "pp" command to work, you will need to start GDB from
> the src directory of the Emacs source tree.

Thank you for the instruction.  But I couldn't get some of the values...

(gdb) frame 1
#1  0x000000000055abbc in cons_to_signed (c=6239536, min=-2147483648,
    max=2147483647) at data.c:2430
2430        error ("Not an in-range integer, float, or cons of integers");
(gdb) p val
Variable "val" is not available.
(gdb) pp c
1559884
(gdb) up
#2  0x00000000004d4e52 in x_convert_selection (event=Variable "event" is not 
available.
) at xselect.c:1790
1790          (*(long **) data_ret) [0] = cons_to_signed (obj, X_LONG_MIN, 
X_LONG_MAX);
(gdb) pp obj
No symbol "obj" in current context.

Do I need to recompile emacs without compiler optimization?