1 files changed, 16 insertions, 0 deletions
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 0b94bf993b..c1de8c96de 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -765,4 +765,20 @@ class TestISeq < Test::Unit::TestCase
       assert_equal :new, r.take
     RUBY
   end
+
+  def test_unreachable_pattern_matching
+    assert_in_out_err([], "true or 1 in 1")
+    assert_in_out_err([], "true or (case 1; in 1; 1; in 2; 2; end)")
+  end
+
+  def test_unreachable_pattern_matching_in_if_condition
+    assert_in_out_err([], "#{<<~"begin;"}\n#{<<~'end;'}", %w[1])
+    begin;
+      if true or {a: 0} in {a:}
+        p 1
+      else
+        p a
+      end
+    end;
+  end
 end