From: "splattael (Peter Suschlik)" Date: 2013-03-15T05:18:50+09:00 Subject: [ruby-core:53424] [ruby-trunk - Bug #8097][Open] Mutex#synchronize block param oddity Issue #8097 has been reported by splattael (Peter Suschlik). ---------------------------------------- Bug #8097: Mutex#synchronize block param oddity https://bugs.ruby-lang.org/issues/8097 Author: splattael (Peter Suschlik) Status: Open Priority: Normal Assignee: Category: Target version: ruby -v: 2.0 In 1.9.3 Mutex#synchronize yield nothing. In 2.0.0 Mutex#synchronize yields nil. require 'thread' Mutex.new.synchronize do |*args| p RUBY_VERSION => args end See https://gist.github.com/splattael/5164747 -- http://bugs.ruby-lang.org/