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${name:?word} get executed though -n specified

X-seq: zsh-workers 29528
From: hanpingtian <hanpingtian@xxxxxxx>
To: zsh-workers@xxxxxxx, zsh-users@xxxxxxx
Subject: ${name:?word} get executed though -n specified
Date: Fri, 1 Jul 2011 17:41:07 +0800 (CST)
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hey,

I just noticed that even though -n option specified for checking syntax of a script, the ${xxx:?yyy} still gets executed:

[hpt@hpt]/tmp% cat t.sh
#!/bin/zsh
a=${a:?'not set!'}

echo $a
date
[hpt@hpt]/tmp% zsh -n ./t.sh
./t.sh:2: a: 'not set!'
[hpt@hpt]/tmp%

Is this a problem?

Follow-Ups:
- Re: ${name:?word} get executed though -n specified
  - From: Peter Stephenson

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