Issue #10693 has been reported by Loren Segal.

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Bug #10693: Regression in Ripper for keyword arg default params
https://bugs.ruby-lang.org/issues/10693

* Author: Loren Segal
* Status: Open
* Priority: High
* Assignee: 
* Category: 
* Target version: 
* ruby -v: 2.2.0p0
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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Easy to reproduce, seems to only be present in 2.2:

```ruby
$ ruby -v
ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]
$ ruby -rripper -e 'p Ripper.sexp "def x(a:1) end"'
[:program, [[:def, [:@ident, "x", [1, 4]], [:paren, [:params, nil, nil, nil, nil, [[17568, [:@int, "1", [1, 8]]]], nil, nil]], [:bodystmt, [[:void_stmt]], nil, nil, nil]]]]
```

Note the `17568` instead of the expected identifier name. I assume 17568 is the interned symbol index value instead of the value itself. Expecting to see `"a"` instead of this Fixnum.



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