From: "luke-gru (Luke Gruber) via ruby-core" <ruby-core@...>
Date: 2024-02-16T16:34:21+00:00
Subject: [ruby-core:116800] [Ruby master Bug#20271] Issue with moving embedded string across ractors

Issue #20271 has been updated by luke-gru (Luke Gruber).


PR here: https://github.com/ruby/ruby/pull/9993

----------------------------------------
Bug #20271: Issue with moving embedded string across ractors
https://bugs.ruby-lang.org/issues/20271#change-106822

* Author: luke-gru (Luke Gruber)
* Status: Open
* Priority: Normal
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
When embedded strings are moved, the embedded bytes aren't copied over to the new embedded string. This shows itself when
an embedded string has more than 16 characters, and can also be a problem when the MovedObject has been garbage collected
and another object has taken its place in the ruby heap.

For example:

```ruby
r = Ractor.new {
  foo = receive
  puts foo
  foo
}
obj = "12345678" * 3
puts obj
r.send(obj, move: true)
r.take
```

```
123456781234567812345678
1234567812345678
```




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