bin/40343: inetd vanishes after syslogging "fcntl (F_SETFD, 0): Bad file descriptor"

[eravin%panix.com@localhost]

>Number:         40343
>Category:       bin
>Synopsis:       inetd vanishes after syslogging "fcntl (F_SETFD, 0): Bad file 
>descriptor"
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 08 16:45:00 +0000 2009
>Originator:     Ed Ravin
>Release:        5.0_BETA
>Organization:
PANIX Public Access Networks
>Environment:
NetBSD panix5.panix.com 5.0_BETA NetBSD 5.0_BETA (PANIX-XEN3U-USER-pae) #1: Thu 
Nov 13 17:26:16 EST 2008  
root%juggler.panix.com@localhost:/misc1/obj/misc2/devel/netbsd/5-beta/src/sys/arch/i386/compile/PANIX-XEN3U-USER-pae
 i386
>Description:
also happens in NetBSD 4.0

seems to happen after inetd has either been repeatedly reloaded and/or inetd 
has had to suspend a port or two because of rapid respawning.

no core file found.

we notice inetd has gone away, and this is the last message in syslog:

  inetd[25724]: fcntl (F_SETFD, 0): Bad file descriptor

we restart inetd and all is well until the next time.
>How-To-Repeat:

>Fix: