[Converted from Gnats 2358]

I have a simple program dynamically linked agains pthread.

When i try to set a breakpoint in a child thread created with pthread_create i get 

Program terminated with signal SIGTRAP, Trace/breakpoint trap.

I am using NPTL

Release:
> gdb 6.6

Environment:
Gentoo distribution, all patches,kernel 2.6.22-gentoo-r8, also happens with newer kernels

gcc (GCC) 4.1.2 (Gentoo 4.1.2)

---------------
GNU C Library stable release version 2.6.1, by Roland McGrath et al.
Compiled by GNU CC version 4.1.2 (Gentoo 4.1.2).
Compiled on a Linux >>2.6.22-gentoo-r8<< system on 2007-11-06.
Available extensions:
        C stubs add-on version 2.1.2
        crypt add-on version 2.1 by Michael Glad and others
        Gentoo patchset 1.1
        GNU Libidn by Simon Josefsson
        Native POSIX Threads Library by Ulrich Drepper et al
        Support for some architectures added on, not maintained in glibc core.
        BIND-8.2.3-T5B

How-To-Repeat:
Just compile the program with
gcc -g -o pthreadtest pthreadtest.c -lpthreads

run program with 
./pthreadtest  &

gdb -p `pgrep pthreadtest`

In gdb

br 12
continue