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Bug in [[ "" == "" ]] expressions?

X-seq: zsh-workers 20512
From: Felix Rosencrantz <f.rosencrantz@xxxxxxxxx>
To: zsh-workers@xxxxxxxxxx
Subject: Bug in [[ "" == "" ]] expressions?
Date: Fri, 22 Oct 2004 07:58:22 -0700
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Reply-to: Felix Rosencrantz <f.rosencrantz@xxxxxxxxx>

It seems like zsh on 10-8 works like I'm use to, but a change since
then has changed the behavior.    Not sure if Peter intended this.

Comparing an empty or unset string against an empty pattern returns
false.  Here's the code:
zsh -f
% a=""
% b="abc"
% [[ "$a" == "" ]] ; echo $status
1
% [[ "$b" == "abc" ]] ; echo $status
0
% [[ "$c" == "" ]] ; echo $status
1

-FR

Follow-Ups:
- Re: Bug in [[ "" == "" ]] expressions?
  - From: Peter Stephenson

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