Check argument definedness in defined?(receiver.method(arg)) by sampokuokkanen · Pull Request #9460 · jruby/jruby · GitHub

Mirrors the FCALLNODE path. Fixes test_defined_undefined_argument.

Sample code of the problem:

class Test
  def hello x
    puts "Hello #{x}"
  end
end

p defined? Test.new.hello(hello)

Before this fix: "method", now nil.

Mirrors the FCALLNODE path. Fixes test_defined_undefined_argument.

Check argument definedness in defined?(receiver.method(arg))

5f25bf0

Mirrors the FCALLNODE path. Fixes test_defined_undefined_argument.

sampokuokkanen force-pushed the fix-undefined-argument branch from 7070d83 to 5f25bf0 Compare August 27, 2026 04:56

Check argument definedness in defined?(receiver.method(arg)) - #9460