Do not warn unused block when using forwarding

Fixes [Bug #21003]

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_method.rb b/test/ruby/test_method.rb
index 0707d61f1b..5d5d5aac02 100644
--- a/test/ruby/test_method.rb
+++ b/test/ruby/test_method.rb
@@ -1776,5 +1776,13 @@ class TestMethod < Test::Unit::TestCase
     RUBY
       assert_equal 0, err.size, err.join("\n")
     end
+
+    assert_in_out_err '-w', <<-'RUBY' do |_out, err, _status|
+      def foo(*, &block) = block
+      def bar(buz, ...) = foo(buz, ...)
+      bar(:test) {} # do not warn because of forwarding
+    RUBY
+      assert_equal 0, err.size, err.join("\n")
+    end
   end
 end