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Date: Mon, 5 Nov 2012 16:22:50 +0800
From: Han Pingtian <hanpt@linux.vnet.ibm.com>
To: zsh-workers@zsh.org
Subject: Re: Function code breaking out of if then ...fi
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On Fri, Nov 02, 2012 at 02:39:11PM -0700, Bart Schaefer wrote:
> On Nov 2, 10:09am, Michal Maruska wrote:
> }
> } I wonder if the following behaviour is a bug, or
> } simply my wrong expectation:
> } 
> } This script, assuming the globbing fails, and I'm not using NULL_GLOB,
> } does not bother finishing the commands in the "then ....fi" block,
> } instead continues after "fi".
> 
> This doesn't really have anything to do with the function.  The same
> thing happens with
> 
> if true;
> then
>     echo non-existing*
>     exit 0
> fi
> 
> What slightly surprises me is that a glob failure isn't considered an
> error for purposes of ERR_EXIT (the -e option in your #! line).  I
> would have expected the whole script to quit at that point, but I guess
> glob errors are not treated as command failures because the command
> never executes in the first place.
> 
On my latop, if use 'echo non-existing*' in the if command, the 
script will exit immediately, looks like the glob failure is 
considered an error of ERR_EXIT. And changing to

    { echo non-existing* } always { TRY_BLOCK_ERROR=0 }

doesn't help, it still exits immediately. In the contrast, using 'fn'
won't trigger ERR_EXIT.