When running test-case gdb.threads/detach-step-over.exp using target board unix/-m32, I run into: ... (gdb) FAIL: gdb.threads/detach-step-over.exp: breakpoint-condition-evaluation=host: target-non-stop=off: non-stop=off: displaced=off: iter 1: all threads running detach^M warning: Couldn't reap LWP 14208 while detaching: No child processes^M /home/vries/gdb_versions/devel/src/gdb/linux-nat.c:1449: internal-error: virtual void linux_nat_target::detach(inferior*, int): Assertion `num_lwps (pid) == 1' failed.^M ...