[ruby-core:106358] [Ruby master Bug#18375] Timeout.timeout(sec, klass: MyExceptionClass) can not retry correctly.

Issue #18375 has been reported by zw963 (Wei Zheng).

----------------------------------------
Bug #18375: Timeout.timeout(sec, klass: MyExceptionClass) can not retry correctly.
https://bugs.ruby-lang.org/issues/18375

* Author: zw963 (Wei Zheng)
* Status: Open
* Priority: Normal
* ruby -v: 3.0.3
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
Following is a example for describe this issue.

```rb
class DelayError < Exception
end

Timeout.timeout(2, DelayError) do |arg|
  puts 'start'
  sleep 10
rescue DelayError
  puts '*'*10
  retry
end
```

Will output

```
start
**********
start
```

What i expected is:

```
start
**********
start
**********
start
**********
...
```



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