Issue #11535 has been reported by bug hit.

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Bug #11535: inaccessable keyword arg names are allowed
https://bugs.ruby-lang.org/issues/11535

* Author: bug hit
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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```ruby
foo(for: 1)
end
```

foo param can not be accessed directly (without local_variable_get) since it's a reserved word



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