From: "bjfish (Brandon Fish)" <noreply@...>
Date: 2022-03-30T16:30:05+00:00
Subject: [ruby-core:108122] [Ruby master Bug#18670] MatchData#[start, length] pads nil values when negative start is given

Issue #18670 has been reported by bjfish (Brandon Fish).

----------------------------------------
Bug #18670: MatchData#[start, length] pads nil values when negative start is given
https://bugs.ruby-lang.org/issues/18670

* Author: bjfish (Brandon Fish)
* Status: Open
* Priority: Normal
* ruby -v: 3.0.3
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------

Example
``` ruby
irb(main):001:0> /(.)(.)(\d+)(\d)/.match("THX1138.")[-1, 10]
=> ["8", nil, nil, nil, nil, nil, nil, nil, nil, nil]
```

I would expect this to be consistent with String or Array for example:
``` ruby
irb(main):002:0> "hello"[-1, 10]
=> "o"
irb(main):003:0> [1,2,3][-1,10]
=> [3]
```




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