1 files changed, 21 insertions, 0 deletions
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 9429d8bc21..67d6606519 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -828,6 +828,27 @@ class TestISeq < Test::Unit::TestCase
     end;
   end
 
+  def test_unreachable_next_in_block
+    bug20344 = '[ruby-core:117210] [Bug #20344]'
+    assert_nothing_raised(SyntaxError, bug20344) do
+      compile(<<~RUBY)
+        proc do
+          next
+
+          case nil
+          when "a"
+            next
+          when "b"
+          when "c"
+            proc {}
+          end
+
+          next
+        end
+      RUBY
+    end
+  end
+
   def test_loading_kwargs_memory_leak
     assert_no_memory_leak([], "#{<<~"begin;"}", "#{<<~'end;'}", rss: true)
     a = RubyVM::InstructionSequence.compile("foo(bar: :baz)").to_binary