From: "byroot (Jean Boussier) via ruby-core" <ruby-core@...>
Date: 2024-06-10T13:19:43+00:00
Subject: [ruby-core:118268] [Ruby master Bug#20569] Instruction sequence generated from `shareable_constant_value: literal` files may not be serialized to binary

Issue #20569 has been reported by byroot (Jean Boussier).

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Bug #20569: Instruction sequence generated from `shareable_constant_value: literal` files may not be serialized to binary
https://bugs.ruby-lang.org/issues/20569

* Author: byroot (Jean Boussier)
* Status: Open
* Assignee: ko1 (Koichi Sasada)
* Backport: 3.1: WONTFIX, 3.2: REQUIRED, 3.3: REQUIRED
----------------------------------------
```ruby
iseq = RubyVM::InstructionSequence.compile(<<~'RUBY')
  # shareable_constant_value: literal
  REGEXP = /#{}/
RUBY
iseq.to_binary
```

```
in `to_binary': ibf_dump_object_unsupported: 0x00000001026ac8b0 [3LM    ] T_ICLASS  (NotImplementedError)
```

The reason is that the ISeq contains `putobject RubyVM::FrozenCore` so `compile.c` need some special handling of that hidden class.

Proposed patch: https://github.com/ruby/ruby/pull/10951





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