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From: "peterzhu2118 (Peter Zhu) via ruby-core"
Date: 2025-05-23T19:57:36+00:00
Subject: [ruby-core:122261] [Ruby Bug#21368] Moving objects with finalizer between Ractors crashes
Issue #21368 has been reported by peterzhu2118 (Peter Zhu).
----------------------------------------
Bug #21368: Moving objects with finalizer between Ractors crashes
https://bugs.ruby-lang.org/issues/21368
* Author: peterzhu2118 (Peter Zhu)
* Status: Open
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
When an object is moved to a different Ractor, the finalizers are not copied to the new object, so it will have the `FL_FINALIZE` flag set but no entry in the finalizer table.
The following script crashes:
```ruby
r = Ractor.new do
loop { Ractor.receive }
end
1_000.times do
o = Object.new
ObjectSpace.define_finalizer(o, proc { |id| })
r.send(o, move: true)
end
```
--
https://bugs.ruby-lang.org/
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