Issue #5746 has been updated by marcandre (Marc-Andre Lafortune). Assignee changed from nobu (Nobuyoshi Nakada) to marcandre (Marc-Andre Lafortune) ---------------------------------------- Bug #5746: Proc#curry too strict about lambda's arity. https://bugs.ruby-lang.org/issues/5746#change-28154 Author: marcandre (Marc-Andre Lafortune) Status: Assigned Priority: Normal Assignee: marcandre (Marc-Andre Lafortune) Category: core Target version: ruby -v: - Currently, Proc#curry raises an error when you attempt to curry a lambda with optional (but limited) arguments: l = ->(arg = 42) {} l.curry(1) # => ArgumentError: wrong number of arguments (1 for 0) Note that Proc#curry behaves correctly if the Proc was created from a method, even though arguments are treated the same way: def Object.foo(arg = 42); end m = Object.method(:foo).to_proc m.class # => Proc, same as 'l' m.lambda? # => true, same as 'l' m.curry(1) # => curried proc Referring to my evaluation method, my proposed fix passes SST: a) usefulness: way more useful, as it makes it possible to do something that is not currently possible b) consistency: makes it consistent with equivalent method c) intuitiveness and d) performance: similar It is straightforward (but not obvious), as it passes NIT (but not ODT). This bug is a consequence of the redmine issue 5694; this will be fixed automatically when 5694 is fixed. -- http://bugs.ruby-lang.org/