`ISeq#to_a` respects `use_block` status

```ruby
b = RubyVM::InstructionSequence.compile('def f = yield; def g = nil').to_a
pp b

 #=>
 ...
 {:use_block=>true},
 ...
```

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index dc84d8bd7c..a31605885a 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -827,6 +827,18 @@ class TestISeq < Test::Unit::TestCase
     end
   end
 
+  def block_using_method
+    yield
+  end
+
+  def block_unused_method
+  end
+
+  def test_unused_param
+    assert_equal true, RubyVM::InstructionSequence.of(method(:block_using_method)).to_a.dig(11, :use_block)
+    assert_equal nil, RubyVM::InstructionSequence.of(method(:block_unused_method)).to_a.dig(11, :use_block)
+  end
+
   def test_compile_prism_with_invalid_object_type
     assert_raise(TypeError) do
       RubyVM::InstructionSequence.compile_prism(Object.new)