Issue #10436 has been reported by Akira Tanaka.

----------------------------------------
Bug #10436: ruby -c and ripper inconsistency: m(&nil) {}
https://bugs.ruby-lang.org/issues/10436

* Author: Akira Tanaka
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.2.0dev (2014-10-27 trunk 48168) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
m(&nil) {} というまちがったコードは
ruby -c でちゃんとエラーになるのに、
Ripper.sexp ではならないようです。

```
% cat z.rb 
m(&nil) {}
% ruby -c z.rb 
z.rb:1: both block arg and actual block given
% ruby -rripper -e 'p Ripper.sexp(STDIN.read)' < z.rb
[:program, [[:method_add_block, [:method_add_arg, [:fcall, [:@ident, "m", [1, 0]]], [:arg_paren, [:args_add_block, [], [:var_ref, [:@kw, "nil", [1, 3]]]]]], [:brace_block, nil, [[:void_stmt]]]]]]
% ruby -v
ruby 2.2.0dev (2014-10-27 trunk 48168) [x86_64-linux]
```




-- 
https://bugs.ruby-lang.org/