bin/41479: cvs -z not working

[martin%duskware.de@localhost]

>Number:         41479
>Category:       bin
>Synopsis:       cvs -z not working
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat May 23 11:20:00 +0000 2009
>Originator:     Martin Husemann
>Release:        NetBSD 5.99.11
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD sunny-weather.duskware.de 5.99.11 NetBSD 5.99.11 (SUNNY.MP) 
#159: Sat May 23 10:57:51 CEST 2009 
martin%sunny-weather.duskware.de@localhost:/usr/src/sys/arch/sparc64/compile/SUNNY.MP
 sparc64
Architecture: sparc64
Machine: sparc64
>Description:

When used with -z3 (compression level does not matter) cvs update does not work
for me "often". This always used to work before the recent cvs update.

Ktrace shows the client process ends up in select() after 
reading all (compressed) data from the server, seems it just didn't notice
all data is there. Not sure if this is MD yet.

When updating full trees it usually works (as there is more data following),
but when removing a single file and updating just that the problem is pretty
reproducable for me. Doing a plain "cvs up $file" w/o compression always
works.

>How-To-Repeat:
s/a
>Fix:
n/a