Bug #19413: Can't move object when 2 ivars refer to same object

• Status: Open
• Assignee: -
• Target version: -
• Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

[luke-gru (Luke Gruber)]

class A
  def initialize
    @a = Object.new
    @b = @a
  end
end

r = Ractor.new do |err|
  obj = receive
  p obj
end
r.send(A.new, move: true) # Allocator undefined for Ractor::MovedObject
r.take

To fix it we could have a hash of old to new objects during traversal/replacement and use the same new object over again if necessary.