[ruby-core:84344] [Ruby trunk Bug#14023] SyntaxError on array argument and block

Issue #14023 has been updated by shyouhei (Shyouhei Urabe).


https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/19197

Matz's intention is very clear that this kind of expression shall render syntax errors.

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Bug #14023: SyntaxError on array argument and block
https://bugs.ruby-lang.org/issues/14023#change-68521

* Author: k0kubun (Takashi Kokubun)
* Status: Assigned
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Target version: 2.5
* ruby -v: ruby 2.5.0preview1 (2017-10-10 trunk 60153) [x86_64-darwin16]
* Backport: 2.3: DONTNEED, 2.4: REQUIRED
----------------------------------------
~~~
$ RBENV_VERSION=2.4.2 ruby -v
ruby 2.4.2p198 (2017-09-14 revision 59899) [x86_64-darwin16]

$ RBENV_VERSION=2.4.2 ruby -c -e 'a [] {}'
Syntax OK

$ RBENV_VERSION=2.5.0-preview1 ruby -v
ruby 2.5.0preview1 (2017-10-10 trunk 60153) [x86_64-darwin16]

$ RBENV_VERSION=2.5.0-preview1 ruby -c -e 'a [] {}'
-e:1: syntax error, unexpected '{', expecting end-of-input
a [] {}
     ^
~~~

Is this intentional? This causes syntax error on https://github.com/plataformatec/devise/blob/v4.2.0/app/controllers/devise/sessions_controller.rb#L5.



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