Bug #14023: SyntaxError on array argument and block

• Status: Rejected
• 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

[k0kubun (Takashi Kokubun)]

$ 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.

[wanabe (_ wanabe)]

• Related to Bug #13547: [].delete 1 { 'NG' } added

[wanabe (_ wanabe)]

• Related to Bug #13691: Word- and symbol array literals not valid where regular array is added

[naruse (Yui NARUSE)]

• Status changed from Open to Assigned
• Assignee set to nobu (Nobuyoshi Nakada)

This seems regression caused by Bug #13547

% RBENV_VERSION=2.3.5 ruby -c -e 'a [] {}'
Syntax OK
% RBENV_VERSION=2.3.5 ruby -c -e '1.upto 2 {|i|p i}'
-e:1: syntax error, unexpected '{', expecting end-of-input
1.upto 2 {|i|p i}
          ^

%  RBENV_VERSION=2.4.1 ruby -c -e 'a [] {}'
Syntax OK
%  RBENV_VERSION=2.4.1 ruby -c -e '1.upto 2 {|i|p i}'
Syntax OK

% ~/local/ruby/bin/ruby -c -e 'a [] {}'
-e:1: syntax error, unexpected '{', expecting end-of-input
a [] {}
     ^
% ~/local/ruby/bin/ruby -c -e '1.upto 2 {|i|p i}'
-e:1: syntax error, unexpected '{', expecting end-of-input
1.upto 2 {|i|p i}
         ^

[naruse (Yui NARUSE)]

• Backport changed from 2.3: UNKNOWN, 2.4: UNKNOWN to 2.3: DONTNEED, 2.4: REQUIRED

[shyouhei (Shyouhei Urabe)]

• Is duplicate of Bug #505: 1.upto 2 {|i| p i } added

[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.

[naruse (Yui NARUSE)]

• Status changed from Assigned to Rejected

[k0kubun (Takashi Kokubun)]

• Has duplicate Bug #14433: Error with Trailblazer Wrap using ruby 2.5.0 added