Issue #19372 has been updated by luke-gru (Luke Gruber). PR here: https://github.com/ruby/ruby/pull/7182 ---------------------------------------- Bug #19372: Proc objects are not traversed for shareable check during Ractor.make_shareable(prok) https://bugs.ruby-lang.org/issues/19372#change-101464 * Author: luke-gru (Luke Gruber) * Status: Open * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- ```ruby class Proc attr_accessor :obj1 def initialize @obj1 = Object.new end end p = true.instance_eval { Proc.new { puts "hi" } } Ractor.make_shareable(p) p "Obj1 frozen?", Ractor.shareable?(p.obj1) P = p r = Ractor.new do pp = P p pp.obj1 # gives error in debug builds (rb_ractor_confirm_belonging rb_bug() call) end ``` -- https://bugs.ruby-lang.org/