#704: Singleton bug with define_method --------------------------------+------------------------------------------- Reporter: mike@… | Owner: lsansonetti@… Type: defect | Status: new Priority: major | Milestone: Component: MacRuby | Keywords: --------------------------------+------------------------------------------- Comment(by jhemmelg@…): It looks like any I/O causes trouble for define_method. Here is a variation of the above script with a puts statement in the assignment method, with different behavior: {{{ class SingletonTest attr_reader :values def initialize @values = {} end def addMethod(name) singleton = class << self self end singleton.instance_exec(name) do |name| define_method("#{name}=") do |value| puts "Setting #{name} to #{value}" @values[name] = value end define_method("#{name}") do return @values[name] end end end end singleton_test = SingletonTest.new() singleton_test.addMethod('foo') singleton_test.foo = 10.0 value = singleton_test.foo puts value puts value.class puts singleton_test.values }}} And here is the output: {{{ Setting foo to 10.0 10.0 Float {"Setting foo to 10.0"=>10.0} }}} The hash key ends up being "Setting foo to 10.0" instead of "foo". -- Ticket URL: <http://www.macruby.org/trac/ticket/704#comment:1> MacRuby <http://macruby.org/>