[ruby-core:97064] [Ruby master Bug#16609] #select not working with blocks properly

Issue #16609 has been reported by LukeH7789 (Luke Hill).

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Bug #16609: #select not working with blocks properly
https://bugs.ruby-lang.org/issues/16609

* Author: LukeH7789 (Luke Hill)
* Status: Open
* Priority: Normal
* ruby -v: 2.7.0
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
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I've tagged this as Bug, as it may be a bug, it may be a uncoded / partially working feature.

Observe the following is possible

```
a = [1, 2, 3, 4, 5, 6]
a.select(&:even?) #=> [2, 4, 6]
a.select { |e| e.even? } #=> [2, 4, 6]
a.sample #=> 3 (For example)
a.select(&:even?).sample #=> 2 or 4 or 6
```

However, running `#sample` with a block doesn't complain or throw an error. So the following code runs (But doesn't execute correctly).

```
a.sample(&:even?) #=> 1 or 3 or 5 is **expected**
a.sample { |e| e.even? } #=> 1 or 3 or 5 is **expected**
```

But if you run the second snippet you can get any number from 1 to 6. Here is a few runs

```
2.7.0 :004 > a.sample
 => 3 
2.7.0 :005 > a.sample(&:even?)
 => 1 
2.7.0 :006 > a.sample(&:even?)
 => 2 
2.7.0 :007 > a.sample(&:even?)
 => 6 
2.7.0 :008 > a.sample(&:even?)
 => 3 
2.7.0 :009 > a.sample(&:even?)
 => 2 
```



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