Getting syntax error when running "rails new"

Question

When I try to create a new project by running:

rails new app

I get the following error message:

/usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121:in `require': /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checkers/method_name_checker.rb:9: syntax error, unexpected '.' (SyntaxError)
      @has_args    = !exception.args&.empty?
                                      ^
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121:in `require'
    from /usr/lib/ruby/vendor_ruby/did_you_mean.rb:6:in `<top (required)>'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121:in `require'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121:in `require'
    from /var/lib/gems/2.2.0/gems/thor-0.20.3/lib/thor/error.rb:4:in `<class:Thor>'
    from /var/lib/gems/2.2.0/gems/thor-0.20.3/lib/thor/error.rb:1:in `<top (required)>'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /var/lib/gems/2.2.0/gems/thor-0.20.3/lib/thor/base.rb:4:in `<top (required)>'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /var/lib/gems/2.2.0/gems/thor-0.20.3/lib/thor.rb:2:in `<top (required)>'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121:in `require'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:121:in `require'
    from /var/lib/gems/2.2.0/gems/railties-5.1.4/lib/rails/command.rb:7:in `<top (required)>'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /var/lib/gems/2.2.0/gems/railties-5.1.4/lib/rails/cli.rb:10:in `<top (required)>'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
    from /var/lib/gems/2.2.0/gems/railties-5.1.4/exe/rails:9:in `<top (required)>'
    from /usr/local/bin/rails:23:in `load'
    from /usr/local/bin/rails:23:in `<main>'

I'm not sure what's going on. What's this?

Try to reinstall ruby then rails and then try, what happens? — 2017kamb
– 2017kamb, Commented Mar 12, 2019 at 3:21
Upgrade your Ruby to at least 2.3, that's when the safe navigation operator (&.) was added: ruby-lang.org/en/news/2015/12/25/ruby-2-3-0-released — mu is too short
– mu is too short, Commented Mar 12, 2019 at 3:41

sawa · Accepted Answer · 2019-03-12 06:01:57Z

1

The safe navigation operator &. is invalid in Ruby < 2.3. And you are using Ruby 2.2. That is the cause of the syntax error.

answered Mar 12, 2019 at 6:01

sawa

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Comments

Rajkumar Ulaganadhan · Accepted Answer · 2019-03-12 05:49:50Z

0

Try to use rvm and then install rails.

rvm install 2.5.0

Reference : https://rvm.io/rvm/install

answered Mar 12, 2019 at 5:49

Rajkumar Ulaganadhan

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2 Comments

sawa Over a year ago

Why Ruby 2.5.0 now? It is neither the oldest required for &., nor the newest available.

Rajkumar Ulaganadhan Over a year ago

I have tried in my local system for rails new app. it is working fine. so i suggested.

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