[ruby-core:115594] [Ruby master Bug#20042] ObjectSpace finalizer can cause segfault

Issue #20042 has been reported by ioquatix (Samuel Williams).

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Bug #20042: ObjectSpace finalizer can cause segfault
https://bugs.ruby-lang.org/issues/20042

* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
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```ruby
class Finalizer
  def call # <- missing (id) argument
 end
end

object = Object.new
ObjectSpace.define_finalizer(object, Finalizer.new)
object = nil

GC.start # segfaults here
```



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