From: Brian Candler <b.candler@...>
Date: 2009-04-15T21:58:02+09:00
Subject: Re: OptionParser and Exceptions

Robert Klemme wrote:
> You need to rescue Exception because rescue without any arguments only
> rescues RuntimeErrors IIRC

rescue without any arguments rescues StandardError. (StandardError is an 
ancestor of RuntimeError, and Exception is an ancestor of StandardError)

See:
http://www.zenspider.com/Languages/Ruby/QuickRef.html#34

You should normally be a bit wary of 'rescue Exception'. This will 
rescue all sorts of internal failures like NoMemoryError or SyntaxError 
which you may not want to hide.
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