#!/usr/bin/env ruby

class A
  def shift(count)
    it = "hi"
    puts it.inspect
    count.times do
      puts it.inspect
      break unless it.length == 1
    end
    "bye"
  end
end

A.new.shift(3)

Environment Information

jruby 10.0.0.0 (3.4.2) 2025-04-13 6ed59bc OpenJDK 64-Bit Server VM 21.0.6+7-Ubuntu-124.04.1 on 21.0.6+7-Ubuntu-124.04.1 +indy +jit [x86_64-linux]

Expected Behavior

Expected output (and actual output from JRuby 9.4.12.0 and CRuby 3.4.2):

"hi"
"hi"

Actual Behavior

Actual output:

"hi"
0
NoMethodError: undefined method 'length' for an instance of Integer
   shift at ./test.rb:9
   times at org/jruby/RubyFixnum.java:343
   shift at ./test.rb:7
  <main> at ./test.rb:15

It seems that it in the block is referring to the special block variable, even though a local of the same name already exists (which apparently makes the special block variable not created in CRuby?)