$pipestatus broken?

[Frank Terbeck <ft@bewatermyfriend.org>]

Hey list,

I've been playing with $pipestatus to solve the subversion1.7 issues in
vcs_info... Because it turns out, it can be a whole bunch of error
messages.

So the idea was not to match output but to look at subversion's exit
status. Since "svn info" is called in a pipe, I was using $pipestatus.
The result was mixed - literally. Sometimes, $pipestatus would contain
"0 0" and sometimes it would contain just a single "1".

Now I was extracting the offending code into a test script and then
later replaced the call to "svn info" by a call to fortune(1). The
result is the same.

Here's my test script:
[snip]
local -A svninfo
fortune |& while IFS=: read a b; do
    svninfo[${a// /_}]="${b## #}"
done
ps=( "${pipestatus[@]}" )
rc=${ps[1]}
print "${ps[@]}"
[snap]

And here is a test-run:
[snip]
% repeat 10 zsh ./test
1
0 0
1
1
0 0
0 0
0 0
1
0 0
1
[snap]

Am I using `$pipestatus' the wrong way or is this a bug?

Regards, Frank

-- 
In protocol design, perfection has been reached not when there is
nothing left to add, but when there is nothing left to take away.
                                                  -- RFC 1925