gistfile1.txt

$ cat t.rb
b = eval("def get_binding; binding; end; get_binding",
         TOPLEVEL_BINDING,
         __FILE__,
         __LINE__ - 3)
p eval(<<EOF, b)
def foo; end
self.foo
EOF
$ ~/ruby/1.9.2/bin/ruby-1.9.2 -v /tmp/t.rb
ruby 1.9.2p290 (2011-07-09 revision 32553) [i686-linux]
/tmp/t.rb:2:in `get_binding': private method `foo' called for main:Object (NoMethodError)
	from /tmp/t.rb:5:in `eval'
	from /tmp/t.rb:5:in `<main>'
$ ruby-trunk -v /tmp/t.rb
ruby 2.0.0dev (2011-11-29 trunk 33895) [i686-linux]
nil