Lint/RequireRelativeSelfPath crash if require_relative is called with a variable instead of a string literal

[ntkme]

Input:

Dir['test/**/test_*.rb'].each { |f| require_relative f }

Error:

An error occurred while Lint/RequireRelativeSelfPath cop was inspecting /build/test.rb:1:36.
undefined method `value' for s(:lvar, :f):RuboCop::AST::Node

rubocop/lib/rubocop/cop/lint/require_relative_self_path.rb

Line 30 in 05494a4

return unless same_file?(processed_source.file_path, required_feature.value)