From: "bughit (bug hit)" <noreply@...>
Date: 2022-01-06T16:26:14+00:00
Subject: [ruby-core:106984] [Ruby master Feature#18461] closures are capturing unused variables

Issue #18461 has been updated by bughit (bug hit).


> But, maybe we could deprecate Proc#binding and remove it, I think that would be a good start.

There's no such need. If the capture is optimized then Proc#binding will continue giving access to what has been captured, rather than everything that could be captured.

----------------------------------------
Feature #18461: closures are capturing unused variables
https://bugs.ruby-lang.org/issues/18461#change-95815

* Author: bughit (bug hit)
* Status: Open
* Priority: Normal
----------------------------------------
```rb
def foo
  a = 1
  ->{}
end
p foo.binding.local_variables # [:a]

```

Shouldn't `a` be optimized away? Like v8 does (https://bugs.chromium.org/p/v8/issues/detail?id=3491)



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