Issue #22249 has been updated by jhawthorn (John Hawthorn). * [Bug #22291] Instance variables should be forbidden on Ractor-shareable objects * Currently reading an ivar from a Ractor-shareable, but **not frozen**, object is only allowed on the main Ractor. But freezing these objects then incorrectly allows other Ractors to read the (possibly Ractor-unsafe) ivars. * I propose we forbid setting instance variables on shareable Ractor objects. * Currently, Ractor, ENV, Shareable proc will forbid setting instance variables (no change to Class/Module which have special rules) * Is this acceptable? ---------------------------------------- Misc #22249: DevMeeting-2026-09-10 https://bugs.ruby-lang.org/issues/22249#change-118812 * Author: mame (Yusuke Endoh) * Status: Open ---------------------------------------- # The next dev meeting **Date: 2026/09/10 13:00-17:00** (JST) Log: *TBD* - Dev meeting *IS NOT* a decision-making place. All decisions should be done at the bug tracker. - Dev meeting is a place we can ask Matz, nobu, nurse and other developers directly. - Matz is a very busy person. Take this opportunity to ask him. If you can not attend, other attendees can ask instead of you (if attendees can understand your issue). - We will write a record of the discussion in the file or to each ticket in English. - All activities are best-effort (keep in mind that most of us are volunteer developers). - The date, time and place of the meeting are scheduled according to when/where we can reserve Matz's time. - *DO NOT* discuss then on this ticket, please. # Call for agenda items If you have a ticket that you want matz and committers to discuss, please post it into this ticket in the following format: ``` * [Ticket ref] Ticket title (your name) * Comment (A summary of the ticket, why you put this ticket here, what point should be discussed, etc.) ``` Example: ``` * [Feature #14609] `Kernel#p` without args shows the receiver (ko1) * I feel this feature is very useful and some people say :+1: so let discuss this feature. ``` - It is recommended to add a comment by 2026/09/07. We hold a preparatory meeting to create an agenda a few days before the dev-meeting. - The format is strict. We'll use [this script to automatically create an markdown-style agenda](https://gist.github.com/mame/b0390509ce1491b43610b9ebb665eb86). We may ignore a comment that does not follow the format. - Your comment is mandatory. We cannot read all discussion of the ticket in a limited time. We appreciate it if you could write a short summary and update from a previous discussion. -- https://bugs.ruby-lang.org/