From: "Eregon (Benoit Daloze)" <noreply@...>
Date: 2021-10-06T18:31:14+00:00
Subject: [ruby-core:105574] [Ruby master Bug#18232] Ractor.make_shareable is broken in code loaded with RubyVM::InstructionSequence.load_from_binary

Issue #18232 has been updated by Eregon (Benoit Daloze).


FYI the way it currently works for OStruct seems buggy on the Ractor side: #18243

----------------------------------------
Bug #18232: Ractor.make_shareable is broken in code loaded with RubyVM::InstructionSequence.load_from_binary
https://bugs.ruby-lang.org/issues/18232#change-94030

* Author: byroot (Jean Boussier)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.0.2p107, ruby 3.1.0dev
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
This was first reported as a Bootsnap bug: https://github.com/Shopify/bootsnap/issues/376

But I reduced it to:

```ruby
source = <<~RUBY
  x = :foo
  pr = Proc.new { p x }
  Ractor.make_shareable(pr)
  pr.call
RUBY
RubyVM::InstructionSequence.compile(source).eval # :foo
RubyVM::InstructionSequence.load_from_binary(RubyVM::InstructionSequence.compile(source).to_binary).eval # false
```

The bug is present on both 3.0.2 and 3.1.0-dev. I have no idea what might cause this.



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