From: Michael Davis <mdavis@...>
Date: 2002-03-11T08:15:37+09:00
Subject: Re: Issue with trapping errors in instance_eval

Dave Thomas wrote:

> "Filip Moens" <filip.moens@chello.be> writes:
> 
> 
>>On my machine (Windows 2000), this problem indeed occurs with Ruby 1.6.6 and
>>1.6.7.
>>The error is caugth correctly with Ruby 1.7.2.
>>
> 
> It isn't really an error - a 'rescue' clause without specific
> exceptions only catches exceptions of class StandardError and its
> children.
> 
> On 1.6, NameError is a child of ScriptError, which is a child of the
> base class Exception. Therefore, a simple 'rescue' won't catch
> it. However
> 
>     rescue Exception
> 
> or
> 
>     rescue ScriptError
> 
> or
> 
>     rescue NameError
> 
> will.
> 
> Under 1.7, the exception hierarchy has changed. Now NameError's parent
> is StandardError, and so it's caught by a default rescue clause.
> 
> 
> Dave
> 
> 
> 

Excellent!  Thanks for the explaination.

-- 
Michael Davis
Database Architect and Senior Software Engineer, Seva Inc.
Email: mdavis@sevainc.com