Thanks to Victor Hooi for the bug report, and Serhiy Storchaka for the initial patch.

Thanks to Victor Hooi for the bug report, and Serhiy Storchaka for the initial patch.

Also some other consistency tweaks.

Also some other consistency tweaks.

Addresses the remaining feature request from issue #2489.

return a returncode of 0 when the child has already exited or cannot be
waited on.

to return a returncode of 0 when the child has already exited or cannot be
waited on.

to return a returncode of 0 when the child has already exited or cannot
be waited on.