Percent array literal inside a block causes infinite loop with --disable-uncorrectable.

[sliiser]

A rather simple example that causes an infinite loop with several cops. The example is given with Metrics/MethodLength, but is also reproducible with Metrics/ClassLength, Metrics/AbcSize, Metrics/CyclomaticComplexity and Metrics/PerceivedComplexity. List is not exhaustive.

---

Steps to reproduce the problem

# .rubocop.yml
AllCops:
  NewCops: enable

Metrics/MethodLength:
  Max: 2 # just for demonstration

# frozen_string_literal: true

def foo
  bar do
    %w[]
  end
end

$ rubocop -A --disable-uncorrectable

Expected behavior

# frozen_string_literal: true

def foo # rubocop:todo Metrics/MethodLength
  bar do
    %w[]
  end
end

Actual behavior

# frozen_string_literal: true

def foo
  bar do
    # rubocop:todo Metrics/MethodLength
    # rubocop:todo Metrics/MethodLength
    # rubocop:todo Metrics/MethodLength
    ...
    # rubocop:todo Metrics/MethodLength
    # rubocop:todo Metrics/MethodLength
    # rubocop:todo Metrics/MethodLength
    %w[]
    # rubocop:enable Metrics/MethodLength
    # rubocop:enable Metrics/MethodLength
    # rubocop:enable Metrics/MethodLength
    ...
    # rubocop:enable Metrics/MethodLength
    # rubocop:enable Metrics/MethodLength
    # rubocop:enable Metrics/MethodLength
  end
end

Infinite loop detected in <the file>.rb and caused by Metrics/MethodLength

RuboCop version

$ rubocop -V
1.56.3 (using Parser 3.2.2.3, rubocop-ast 1.28.1, running on ruby 3.2.2) [arm64-darwin22]
$ ruby -v
ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin22]