Hello.

It seems some bug in 2.6.6 (and up to
2.6.7-rc3-mm2) makes gdb useless - it
is no longer possible to produce even
a simple stack trace for any program.
Attached it the test-case to demonstrate
the bug. Its output under any 2.6.6 kernels
is:
---
(gdb) #0  0xffffe410 in ?? ()
#1  0xbffffa88 in ?? ()
#2  0x00000000 in ?? ()
---
Absolutely broken backtrace.

And under 2.6.5 (the one that comes with
RedHat FC2 at least) and under 2.4 kernels:
---
(gdb) #0  0x00558402 in ?? ()
#1  0x0041ce83 in __waitpid_nocancel () from /lib/tls/libc.so.6
#2  0x08048645 in main (argc=1, argv=0xfef20f84) at gdb_tst.c:26
---
Perfect backtrace.

Any ideas what have caused this? As I am
using gdb very frequently, this bug gives
me some headache.