> OK, but your suggested message text is too long, I think.  Something
> shorter, like "(address unreadable)" is better, IMO.

Frankly, I think this is overkill - even with the 64bit addresses
the line was still less than 70 characters long. But I'm not going
to argue. Here you go:

    (gdb) core core
    warning: core file may not match specified executable file.
    Core was generated by `./crash'.
    Program terminated with signal 6, Aborted.
    #0  0x00007fe6fe543307 in ?? ()
    0x00007fe6fe543307:     (cannot read memory)

2009-04-17  Joel Brobecker  <brobecker@adacore.com>

        * stack.c (do_gdb_disassembly): Print an error message if an error
        was thrown while trying to perform the disassembly.

I'm currently testing this patch on x86_64-linux, but I don't really
expect any problem.

-- 
Joel