bin/41134: @ command has become a no-op in NetBSD 5.0 RC3

[eravin%panix.com@localhost]

>Number:         41134
>Category:       bin
>Synopsis:       @ command has become a no-op in NetBSD 5.0 RC3
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 04 00:00:01 +0000 2009
>Originator:     Ed Ravin
>Release:        5.0_RC3
>Organization:
Public Access Networks
>Environment:
NetBSD panix5.panix.com 5.0_RC2 NetBSD 5.0_RC2 (PANIX-XEN3U-USER-pae) #1: Sat 
Feb 21 20:24:11 EST 2009  
root%juggler.panix.com@localhost:/misc1/obj/misc2/devel/netbsd/5.0-RC2/src/sys/arch/i386/compile/PANIX-XEN3U-USER-pae
 i386
>Description:
The @ command ain't working.  Create a command, say:

  !!pwd

Copy that line into buffer 'a' with the command: "ayy

Try to execute it with the command: @a

And nothing happens.  In NetBSD 4.0, or in a normal copy of nvi-1.81.6,
it will execute the "pwd" command and put the results into the document.

>How-To-Repeat:

>Fix:
According to an unnamed NetBSD developer: Christos misread some parentheses 
when trying to fix an operator precedence warning, and changed the meaning of a 
complicated expression.