From: "k0kubun (Takashi Kokubun) via ruby-core" <ruby-core@...>
Date: 2025-01-15T01:46:40+00:00
Subject: [ruby-core:120680] [Ruby master Bug#20892] `ObjectSpace.dump` can produce broken JSON for classes with temporary names

Issue #20892 has been updated by k0kubun (Takashi Kokubun).

Backport changed from 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED to 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONE

`ruby_3_3` merged https://github.com/ruby/ruby/pull/12068. Thank you!

----------------------------------------
Bug #20892: `ObjectSpace.dump` can produce broken JSON for classes with temporary names
https://bugs.ruby-lang.org/issues/20892#change-111503

* Author: byroot (Jean Boussier)
* Status: Closed
* Backport: 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONE
----------------------------------------
```ruby
puts ObjectSpace.dump(Class.new.tap { |c| c.set_temporary_name('" little boby table') })
```

Produces the following JSON:

```json
{
  "address":"0x120bea980",
  "type":"CLASS",
  "shape_id":2,
  "slot_size":160,
  "class":"0x120bea840",
  "variation_count":0,
  "superclass":"0x1041ffd38",
  "name":"" little boby table",
  "references":["0x1041ffd38", "0x123e71a98"],
  "memsize":192,
  "flags":{"wb_protected":true}
}
```

Notice how the `name` property is broken.

This only impacts 3.3.x, as that's when `set_temporary_name` was introduced, before that, it was impossible to assign a name that would cause such bug.



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