[ruby-core:112751] [Ruby master Bug#19439] Marshal.load doesn't load Regexp instance variables

Issue #19439 has been updated by naruse (Yui NARUSE).

Backport changed from 2.7: WONTFIX, 3.0: WONTFIX, 3.1: REQUIRED, 3.2: REQUIRED to 2.7: WONTFIX, 3.0: WONTFIX, 3.1: REQUIRED, 3.2: DONE

ruby_3_2 4e4a4e42b284d9309a7e51c97058093539e7a843 merged revision(s) d2520b7b76759118071a16e6bca22726a5de9fb4.

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Bug #19439: Marshal.load doesn't load Regexp instance variables
https://bugs.ruby-lang.org/issues/19439#change-102244

* Author: andrykonchin (Andrew Konchin)
* Status: Closed
* Priority: Normal
* ruby -v: 3.1.3
* Backport: 2.7: WONTFIX, 3.0: WONTFIX, 3.1: REQUIRED, 3.2: DONE
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Hello, I've noticed this strange behaviour:

```ruby
source_object = Regexp.new("a")
source_object.instance_variable_set(:@foo, :bar)

regexp = Marshal.load(Marshal.dump(source_object))
regexp.instance_variables # => []
```

I would expect instance variables to be loaded



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