Minitest/GlobalExpectations autocorrect fails with lambdas

[Aqualon]

Expected behavior

Autocorrected test should run without the warning

Actual behavior

Test is failing

Steps to reproduce the problem

I inherited an internal gem, that has some minitests with the pattern, that a lambda is defined that has raising code and should verify the correct raise.

require "minitest/autorun"
require "mocha/minitest"

describe 'the test' do
  it 'raises' do
    expected = -> {
      raise ArgumentError.new("foo")
    }.must_raise ArgumentError

    expected.message.must_match(/foo/)
  end
end

This gives the expected warning while running

DEPRECATED: global use of must_raise from test.rb:6. Use _(obj).must_raise instead. This will fail in Minitest 6.
DEPRECATED: global use of must_match from test.rb:10. Use _(obj).must_match instead. This will fail in Minitest 6.

Running rubocop gives the warning

rubocop --require rubocop-minitest --only Minitest/GlobalExpectations test/test.rb 
Inspecting 1 file
C

Offenses:

test/test.rb:6:16: C: [Correctable] Minitest/GlobalExpectations: Use _ { -> {
      raise ArgumentError.new("foo")
    } } instead.
    expected = -> { ...
               ^^^^
test/test.rb:10:5: C: [Correctable] Minitest/GlobalExpectations: Use _(expected.message) instead.
    expected.message.must_match(/foo/)
    ^^^^^^^^^^^^^^^^

1 file inspected, 2 offenses detected, 2 offenses auto-correctable

Autocorrect creates the following test:

require "minitest/autorun"
require "mocha/minitest"

describe 'the test' do
  it 'raises' do
    expected = _ { -> {
      raise ArgumentError.new("foo")
    } }.must_raise ArgumentError

    _(expected.message).must_match(/foo/)
  end
end

And this fails with

  1) Failure:
the test#test_0001_raises [test/test.rb:6]:
ArgumentError expected but nothing was raised.

Correcting it to

require "minitest/autorun"
require "mocha/minitest"

describe 'the test' do
  it 'raises' do
    expected = _(-> {
      raise ArgumentError.new("foo")
    }).must_raise ArgumentError

    _(expected.message).must_match(/foo/)
  end
end

works and shows no longer the initial warning by minitest.

RuboCop version

❯ rubocop -V --require rubocop-minitest
1.20.0 (using Parser 3.0.2.0, rubocop-ast 1.11.0, running on ruby 2.7.4 x86_64-darwin20)
  - rubocop-minitest 0.15.0

[Aqualon]

I also did a full rubocop autocorrect, which created

require 'minitest/autorun'
require 'mocha/minitest'

describe 'the test' do
  it 'raises' do
    expected = _ do
      lambda {
        raise ArgumentError, 'foo'
      }
    end.must_raise ArgumentError

    _(expected.message).must_match(/foo/)
  end
end

also failing with

  1) Failure:
the test#test_0001_raises [test/test.rb:6]:
ArgumentError expected but nothing was raised.