I modified debugger that he now debugs locally.
debugit {block} which debugs block and threads spawned from it. 
It is for apps with ruby scripting. And/or apps which runs threads you dont want debug.
 It works in irb too.

require 'debugger'
DEBUGGER__.debug

Date: 2006-08-05 15:57
Sender: Kent Sibilev

It would be nice to see the diff with original debug.rb

Date: 2006-08-05 11:24
Sender: Ondrej Bilka

last 2 lines were how use old debuger behaviour. (added as
debug.rb)
with diff is problem that original is bad formated.