help needed with gdb

[eles]

hello everybody,

here is my setup:
Linux system 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010
x86_64 GNU/Linux

and here is gdbtest.d

import std.stdio;

int x=0;
string t="hello!";

int main(){
	writefln("x=%d",x);
	writefln("t=%s",t);
	return 0;
}

I compiled the latest weekly buid of gdb (7.1.50.20100519) and installed dmd
2.046 via the deb file (including the multilib tools).

then I tried to debug gdbtest. I received the errors below.

user at system:~/Desktop/temp$ dmd gdbtest.d -g
user at system:~/Desktop/temp$ ./gdbtest
x=0
t=hello!
user at system:~/Desktop/temp$ gdb --version
GNU gdb (GDB) 7.1.50.20100519
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
user at system:~/Desktop/temp$ gdb ./gdbtest
GNU gdb (GDB) 7.1.50.20100519
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/felix/Desktop/temp/gdbtest...done.
(gdb) break main
Breakpoint 1 at 0x804efd7
(gdb) run
Starting program: /home/felix/Desktop/temp/gdbtest
warning: the debug information found in "/lib/ld-2.11.1.so" does not match "/
lib/ld-linux.so.2" (CRC mismatch).

[Thread debugging using libthread_db enabled]

Breakpoint 1, 0x0804efd7 in main ()
(gdb) next
Single stepping until exit from function main,
which has no line number information.
x=0
t=hello!
0xf7e45bd6 in __libc_start_main () from /lib32/libc.so.6
(gdb)
Single stepping until exit from function __libc_start_main,
which has no line number information.

Program exited normally.
(gdb)

as you see, the debug session was unsuccesful. can anybody enlighten me why?
what is the line "warning: the debug information found in "/lib/ld-2.11.1.so"
does not match "/lib/ld-linux.so.2" (CRC mismatch)."?

thank you

eles