From: "Eregon (Benoit Daloze) via ruby-core" <ruby-core@...>
Date: 2025-05-16T12:15:50+00:00
Subject: [ruby-core:122145] [Ruby Bug#20009] Marshal.load raises exception when load dumped class include non-ASCII

Issue #20009 has been updated by Eregon (Benoit Daloze).


@nobu What happens when using your patch to Marshal.dump a class and then trying to load it on an older Ruby? Will it create an instance variable `E` or error?
I guess if there is no matching BINARY constant it would error anyway, but if there is it would set that instance variable `E` or different error.

----------------------------------------
Bug #20009: Marshal.load raises exception when load dumped class include non-ASCII
https://bugs.ruby-lang.org/issues/20009#change-113296

* Author: ippachi (Kazuya Hatanaka)
* Status: Open
* ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin22]
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
## Reproduction code

```ruby
class C���������; end
Marshal.load(Marshal.dump(C���������))
```

## Actual result

```
<internal:marshal>:34:in `load': undefined class/module C\xE3\x82\xAF\xE3\x83\xA9\xE3\x82\xB9 (ArgumentError)
        from marshal.rb:2:in `<main>'
```

## Expected result
Returns `C���������`

## Impacted area
An exception is raised in Rails under the following conditions

* minitest is used with default settings
* Parallel execution with parallelize
* test class names contain non-ASCII characters

The default parallelization uses DRb, and Marshal is used inside DRb.

## Other
After trying various things, I thought I could fix it by making `rb_path_to_class` support strings containing non-ASCII characters, but I couldn't find anything more than that.



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