Can't attach to child using gdb-5.1.1 on Linux

[Jesse Marlin]

I have a process that forks a child.  If I try to attach to the
child it reads the symbols and shows an accurate stack trace, but when
I set a breakpoint and try to continue I get the following:

(gdb) c
Continuing.
lin-lwp.c:1003: gdb-internal-error: lin_lwp_wait: Assertion `WIFSTOPPED (status) && WSTOPSIG (status) == SIGSTOP' failed.
An internal GDB error was detected.  This may make further
debugging unreliable.  Continue this debugging session? (y or n) n

Create a core file containing the current state of GDB? (y or n) n

Inferior GDB exited abnormally with code 1


I answered yes to the above also, but it did not improve the situation.  Has
anybody seen this behvior before.  I am using gcc-2.95.3 for compilation.