From: "Trys <"@..., "trys\"@"@..., ">"@...
Date: 2008-07-21T01:34:48+09:00
Subject: Re: Does "rescue" wihtour argument handle any kind of Exception or not?

I単aki Baz Castillo wrote:

>> Run p Interrupt.ancestors, and see if you get:
>>
>>    [Interrupt, SignalException, Exception, Object, Kernel]
>
> ruby1.8    1.8.6.36-1ubuntu3.1
>
> irb>   p Interrupt.ancestors
> [Interrupt, SignalException, Exception, Object, Wirble::Shortcuts,
> PP::ObjectMixin, Kernel]
>
>
> It's different!
>
>
>> Also, put p $! into the rescue handler to see _what_ you rescued!
>
> -----------
> require 'timeout'
>
> begin
>          raise Interrupt
> rescue
>          puts "rescued !!!"
>          puts $!
> end
> ----------
>
> ~# ./test.rb
> rescued !!!
> wrong number of arguments (0 for 1)

Right here is your problem, same thing is happening to me (ruby 1.8.6 
(2007-09-24 patchlevel 111) [i386-mswin32]) For certain reasons raise 
throws ArgumentError (which then gets caught by single rescue) for 
Interrupt without additional parameters.

This will probably work if you just need to raise Interrupt:

raise Interrupt, "an exception"