From: "Eregon (Benoit Daloze) via ruby-core" <ruby-core@...>
Date: 2025-05-16T12:10:23+00:00
Subject: [ruby-core:122144] [Ruby Bug#20009] Marshal.load raises exception when load dumped class include non-ASCII

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


So my suggestion would be:
* Interpret the serialized module/class name as UTF-8, not as BINARY. And of course if it's only 7-bit as US-ASCII (already the case).
* If the module/class name uses another encoding, we could either transcode it to UTF-8, or use nobu's trick of serializing the encoding name as a fake instance variable. Transcoding to UTF-8 seems simpler, and the only case it wouldn't work is for BINARY with non-7-bit, which seems of no value anyway.

----------------------------------------
Bug #20009: Marshal.load raises exception when load dumped class include non-ASCII
https://bugs.ruby-lang.org/issues/20009#change-113295

* 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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