Lint/UnreachableLoop false positive with should_receive and raise in block

[mmb]

Expected behavior

rubocop should not identify this as an unreachable loop.

Actual behavior

rubocop identifies this as an unreachable loop.

Steps to reproduce the problem

test_spec.rb:

# frozen_string_literal: true

class SomeClass; end

describe 'test' do
  it 'test' do
    SomeClass.should_receive(:test).exactly(2).times { raise StandardError }
  end
end

For /private/tmp: Default configuration from /Users/me/.rvm/gems/ruby-2.4.2/gems/rubocop-1.6.1/config/default.yml
Inspecting 1 file
Scanning /private/tmp/test_spec.rb
Loading cache from /Users/me/.cache/rubocop_cache/0fe4423234f49f9a7a29f384c05d385bdc87c27f/6d7a3b621ca1730e04accd938619e4bdab66cfb1/cbd2ebc1b9a3baa10e15b9523bb86be7ea95cc25
W

Offenses:

test_spec.rb:7:5: W: Lint/UnreachableLoop: This loop will have at most one iteration.
    SomeClass.should_receive(:test).exactly(2).times { raise StandardError }
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1 file inspected, 1 offense detected
Finished in 0.10298199998214841 seconds

RuboCop version

$ rubocop -V
warning: parser/current is loading parser/ruby24, which recognizes
warning: 2.4.10-compliant syntax, but you are running 2.4.2.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.
1.6.1 (using Parser 2.7.2.0, rubocop-ast 1.3.0, running on ruby 2.4.2 x86_64-darwin18)