bug report on thread handling

[jlb]

I seem to have found a problem with thread handling in version 5.0 (see "show 
version" below.
Could you tell me if this a bug or something which I can control and work 
around?  I would like
to just get to my breakpoint and that doesn't seem possible.

Thank you,
Joel Breazeale

------ transcript of gdb debugging session follows ------

[root] /home/ngtp/joel/TPuip >> gdb ~ngtp/bin/gpc/TPuip 20591
GNU gdb 5.0rh-5 Red Hat Linux 7.1
Copyright 2001 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux"...
/home/ngtp/joel/TPuip/20591: No such file or directory.
Attaching to program: /home/ngtp/bin/gpc/TPuip, process 20591
Reading symbols from /usr/X11R6/lib/libXm.so.2...done.
Loaded symbols for /usr/X11R6/lib/libXm.so.2
Reading symbols from /usr/X11R6/lib/libXmu.so.6...done.
Loaded symbols for /usr/X11R6/lib/libXmu.so.6
Reading symbols from /usr/X11R6/lib/libXext.so.6...done.
Loaded symbols for /usr/X11R6/lib/libXext.so.6
Reading symbols from /usr/X11R6/lib/libXt.so.6...done.
Loaded symbols for /usr/X11R6/lib/libXt.so.6
Reading symbols from /usr/X11R6/lib/libX11.so.6...done.
Loaded symbols for /usr/X11R6/lib/libX11.so.6
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /usr/X11R6/lib/libXpm.so.4...done.
Loaded symbols for /usr/X11R6/lib/libXpm.so.4
Reading symbols from /lib/i686/libm.so.6...done.
Loaded symbols for /lib/i686/libm.so.6
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /opt/lib/libtcl.so...done.
Loaded symbols for /opt/lib/libtcl.so
Reading symbols from /usr/lib/libefence.so.0...done.
Loaded symbols for /usr/lib/libefence.so.0
Reading symbols from /lib/i686/libc.so.6...done.
Loaded symbols for /lib/i686/libc.so.6
Reading symbols from /lib/i686/libpthread.so.0...done.
[New Thread 1024 (LWP 20590)]
Error while reading shared library symbols:
Can't attach LWP 20590: No such process
Reading symbols from /usr/X11R6/lib/libSM.so.6...done.
Loaded symbols for /usr/X11R6/lib/libSM.so.6
Reading symbols from /usr/X11R6/lib/libICE.so.6...done.
Loaded symbols for /usr/X11R6/lib/libICE.so.6
Reading symbols from /usr/X11R6/lib/libXp.so.6...done.
Loaded symbols for /usr/X11R6/lib/libXp.so.6
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
0x404e990e in __select () from /lib/i686/libc.so.6
(gdb) break WalkTags
Breakpoint 1 at 0x80cd7b6: file tagio.c, line 1649.
(gdb) cont
Continuing.
[New Cannot find thread 2049: invalid thread handle
(gdb) cont
Continuing.
Cannot find thread 2049: invalid thread handle
(gdb) cont
Continuing.
Cannot find thread 2049: invalid thread handle
(gdb) n
Cannot find thread 2049: invalid thread handle
(gdb) show version
GNU gdb 5.0rh-5 Red Hat Linux 7.1
Copyright 2001 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux".
(gdb)