gistfile1.txt

$ ruby -v -rdebug -rubygems -e 0                                                                                                                                            (~)
ruby 1.9.2dev (2009-12-27 trunk 26184) [x86_64-darwin10.2.0]
Debug.rb
Emacs support available.

ruby:0: `' (NilClass)
        from /opt/ruby/trunk/lib/ruby/1.9.1/debug.rb:661:in `excn_handle'
        from /opt/ruby/trunk/lib/ruby/1.9.1/debug.rb:715:in `trace_func'
        from /opt/ruby/trunk/lib/ruby/1.9.1/debug.rb:905:in `block in <class:DEBUGGER__>'
        from ruby:0:in `set_encoding'
        from ruby:0:in `require'
ruby:0:
(rdb:1) exit