From: Stefan Mahlitz <stefan@...>
Date: 2006-01-27T04:40:44+09:00
Subject: Re: Net::imap exceptions

Russell Fulton wrote:
> Stefan Mahlitz wrote:
> 
> Thanks for your response Stefan!
> 
>>> How can I catch these errors?
>> Change the rescue-line to:
>>
>>> rescue Net::IMAP::NoResponseError, Net::IMAP::ByeResponseError, Net::IMAP::BadResponseError
> 
> That was going to be my next try.  Hmmm.... last time I tried putting 
> more than one exception on a rescue statement I got a syntax error?? 
> I'll try again -- must have been some other issue.
> 
>> and so on. Maybe it helps to rescue Net::IMAP::Error only, but can't
>> have a look at the implementation of the other exceptions at the moment.
>>
> 
> Just a check on my understanding of how things *should* work:
> 
> I thought that an unadorned "rescue" *should* catch *all* exceptions. 
> Is this correct?  Should I file a bug report?  Where to?

No, it will only catch all Exceptions that are derived from
StandardError (as I read Pickaxe II, page 108).

Figure 8.1 on page 109 could be helpful.

The exception gets thrown in

> imap = Net::IMAP.new(host, usessl ? 993 : 143, usessl)

as the backtrace tells:

> ...
> from /usr/lib/ruby/1.8/net/imap.rb:916:in `initialize'
>         from test.rb:11:in `new'
>         from test.rb:11:in `tryIMAP'
> ...

and on line 12 is only the standard rescue

> rescue => e

If you add the IMAP-Exceptions there it should work (and raise a
RuntimeException).