# \[Open\] ruby -c and ripper inconsistency: m(&nil) {}

**URL:** <https://www.ruby-forum.com/t/open-ruby-c-and-ripper-inconsistency-m-nil/232776>\
**Category:** Development\
**Created:** [October 28, 2014, 2:25am UTC](https://www.ruby-forum.com/t/open-ruby-c-and-ripper-inconsistency-m-nil/232776 "2014-10-28T02:25:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [October 28, 2014, 2:25am UTC](https://www.ruby-forum.com/t/open-ruby-c-and-ripper-inconsistency-m-nil/232776/1 "2014-10-28T02:25:31Z")

</div>

Issue #10436 has been reported by Akira T…

* * *

Bug #10436: ruby -c and ripper inconsistency: m(&nil) {}

> **[Bug #10436: ruby -c and ripper inconsistency: m(&nil) {} - Ruby master -...](https://bugs.ruby-lang.org/issues/10436)**
>
> Redmine

- Author: Akira T.
- 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。

```auto
% 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]

```