[ruby-core:99205] [Ruby master Misc#17035] is non-symbol key hash spread a bug or a feature?

Issue #17035 has been updated by jeremyevans0 (Jeremy Evans).

Status changed from Open to Closed

chucke (Tiago Cardoso) wrote:
> ``` ruby
> {**{"a" => "b"}}
> ```
> 
> breaks in ruby < 2.7, but works in 2.7 .

This is an expected new feature in ruby 2.7, and will not break in future ruby versions.  `**` is the keyword splat operator. In ruby <2.7, `"a"` is not a valid keyword key, but in ruby 2.7, it is (you can pass it as a keyword if a method accepts arbitrary keywords).

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Misc #17035: is non-symbol key hash spread a bug or a feature?
https://bugs.ruby-lang.org/issues/17035#change-86583

* Author: chucke (Tiago Cardoso)
* Status: Closed
* Priority: Normal
----------------------------------------
Coming from https://github.com/jruby/jruby/issues/6327#issuecomment-659577894

I've queried jruby about a bug I found, only to find that the behaviour is correct for the ruby versions jruby emulates.

The following:


``` ruby
{**{"a" => "b"}}
```

breaks in ruby < 2.7, but works in 2.7 .

I've looked at the 2.7 announcements and didn't find any. Is this a feature that ruby wants to keep (I'd very much like so) ? Or was this accidental, and unlikely to be maintained in the long run?



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