Issue #17826 has been updated by jeremyevans0 (Jeremy Evans). Status changed from Assigned to Closed This appears fixed in Ruby 3.3.0-preview1, though it doesn't work in Ruby 3.2.2. ---------------------------------------- Bug #17826: Ractor#take hangs if used in multiple Threads https://bugs.ruby-lang.org/issues/17826#change-104310 * Author: kukunin (Sergiy Kukunin) * Status: Closed * Priority: Normal * Assignee: ko1 (Koichi Sasada) * ruby -v: ruby 3.0.1p64 (2021-04-05 revision 0fb782ee38) [x86_64-linux] * Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN ---------------------------------------- Hello there. I was playing with Ractors (the awesome technology and the big leap for Ruby) and encountered weird behavior. I tried to schedule and run Ractors in multiple threads, and found out, that Ractor#take hangs even if the ractor is finished. Here is code to reproduce: ``` ruby Array.new(2) do |n| Thread.new do r = Ractor.new do sleep 0.001 end r.take puts "thread #{n} finished" end end.each(&:join) puts 'done' ``` The output is just "thread 0 finished" and the process hangs forever. Sometimes the second thread exists first, and the first freezes. Thank you for your time. Hopefully, it's a valid bug report, not me just misusing the feature =) -- https://bugs.ruby-lang.org/