pluck: false positive?

[akimd]

String#[] accepts regexes. And when used in a call to map, this cop suggests to move to using pluck. This is not wrong, it does work, but I'm not sure you actually meant to promote the use of pluck over map in this case.

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Expected behavior

Don't suggest pluck in this case (?).

Actual behavior

Suggests pluck.

Steps to reproduce the problem

$ echo '%w[abc abcd bcd cd].map{|s| s[/[ab]*/]}' >/tmp/foo.rb

$ bundle exec rubocop --version
1.37.1

$ bundle exec rubocop --only Rails/Pluck /tmp/foo.rb 
Inspecting 1 file
C

Offenses:

/tmp/foo.rb:1:21: C: [Correctable] Rails/Pluck: Prefer pluck(/[ab]*/) over map{|s| s[/[ab]*/]}.
%w[abc abcd bcd cd].map{|s| s[/[ab]*/]}
                    ^^^^^^^^^^^^^^^^^^^

1 file inspected, 1 offense detected, 1 offense autocorrectable