debug_eval

# File lib/debug.rb, line 287
    def debug_eval(str, binding)
      begin
        eval(str, binding)
      rescue StandardError, ScriptError => e
        at = eval("caller(1)", binding)
        stdout.printf "%s:%s\n", at.shift, e.to_s.sub(/\(eval\):1:(in `.*?':)?/, '')
        for i in at
          stdout.printf "\tfrom %s\n", i
        end
        throw :debug_error
      end
    end