Issue #19374 has been updated by luke-gru (Luke Gruber). This issue is fixed by https://github.com/ruby/ruby/pull/7182. I will add a test to that PR for this. ---------------------------------------- Bug #19374: Issue with Ractor.make_shareable with curried procs https://bugs.ruby-lang.org/issues/19374#change-101467 * Author: luke-gru (Luke Gruber) * Status: Open * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- This works, but shouldn't: ```ruby class Worker def start(&blk) blk = blk.curry # bug in ruby allows sharing of non-shareable proc Ractor.make_shareable(blk) @ractor = Ractor.new(blk) do |b| main = b.call p "from ractor: #{main}" end end def work @ractor.take end end worker = Worker.new a = self # unshareable main object p "from main: #{a}" worker.start { a } worker.work ``` The curried proc has a reference to the original proc and it's not checked for shareability. -- https://bugs.ruby-lang.org/