chaos.rb

errors = [
  SystemStackError, LocalJumpError, IOError, RegexpError, ZeroDivisionError,
  ThreadError, SystemCallError, SecurityError, RuntimeError, NameError,
  RangeError, IndexError, ArgumentError, TypeError
]

module Kernel
  def suppress_warnings
    original_verbosity = $VERBOSE
    $VERBOSE = nil
    result = yield
    $VERBOSE = original_verbosity
    return result
  end
end

ObjectSpace.each_object do |obj|
  m = obj.methods.sample
  suppress_warnings {
    obj.instance_eval("def #{m}; raise #{errors.sample}; end", obj.method(m).source_location.to_s, rand(100)) if rand(20) < 1 rescue nil
  }
end