From: Matt Armstrong <matt@...>
Date: 2003-01-16T06:39:20+09:00
Subject: Re: $DEBUG and exceptions

Joel VanderWerf <vjoel@PATH.Berkeley.EDU> writes:

> Joel VanderWerf wrote:
>> What's the rationale for debug mode echoing all those exceptions to
>> stderr? That makes me want to avoid either using exceptions as a
>> control structure or using $DEBUG...
>
> Maybe it's not clear that I meant *handled* exceptions, as in the
> following. Why would I want to know all the exceptions that were
> raised, unless they were uncaught?
>
> $DEBUG=true
> 10.times do |i|
>    begin
>      raise "#{i}"
>    rescue StandardError
>    end
> end
>
> puts "Done!"

If you look at the ruby source, $DEBUG does only 2 things:

    - prints out exceptions when they happen
    - act as if Thread.abort_on_exception = true, even if it isn't.

If you don't like the first, just set Thread.abort_on_exception to
true.  ;-)