7 files changed, 30 insertions, 0 deletions
diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index ea551dbeba..74da8c1dab 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -1543,6 +1543,8 @@ class TestArray < Test::Unit::TestCase
       [[:first_one, :ok], :not_ok].to_h
     }
     assert_equal "wrong element type Symbol at 1 (expected array)", e.message
+    array = [eval("class C\u{1f5ff}; self; end").new]
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) {array.to_h}
     e = assert_raise(ArgumentError) {
       [[:first_one, :ok], [1, 2], [:not_ok]].to_h
     }
diff --git a/test/ruby/test_bignum.rb b/test/ruby/test_bignum.rb
index 012a5624d0..d057e39dbd 100644
--- a/test/ruby/test_bignum.rb
+++ b/test/ruby/test_bignum.rb
@@ -568,6 +568,8 @@ class TestBignum < Test::Unit::TestCase
   def test_coerce
     assert_equal([T64P, T31P], T31P.coerce(T64P))
     assert_raise(TypeError) { T31P.coerce(nil) }
+    obj = eval("class C\u{1f5ff}; self; end").new
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) { T31P.coerce(obj) }
   end
 
   def test_abs
diff --git a/test/ruby/test_complex.rb b/test/ruby/test_complex.rb
index 8da0e51644..de3bb05d6c 100644
--- a/test/ruby/test_complex.rb
+++ b/test/ruby/test_complex.rb
@@ -427,6 +427,9 @@ class Complex_Test < Test::Unit::TestCase
     assert_equal([Complex(Rational(2)),Complex(1)],
 		 Complex(1).coerce(Rational(2)))
     assert_equal([Complex(2),Complex(1)], Complex(1).coerce(Complex(2)))
+
+    obj = eval("class C\u{1f5ff}; self; end").new
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) { Complex(1).coerce(obj) }
   end
 
   class ObjectX
diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index 26c8815cfe..10692e687d 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -457,6 +457,8 @@ class TestEnumerable < Test::Unit::TestCase
     assert_equal([[1, 3], [2, 4], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
     def ary.to_ary; [5, 6]; end
     assert_equal([[1, 5], [2, 6], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
+    obj = eval("class C\u{1f5ff}; self; end").new
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) {(1..1).zip(obj)}
   end
 
   def test_take
diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index b5ced3b12c..91c91a4bbd 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -433,6 +433,18 @@ class TestEnumerator < Test::Unit::TestCase
     assert_raise(RuntimeError) {
       g.__send__ :initialize, proc { |y| y << 4 << 5 }
     }
+
+    g = Enumerator::Generator.new(proc {|y| y << 4 << 5; :foo })
+    a = []
+    assert_equal(:foo, g.each {|x| a << x })
+    assert_equal([4, 5], a)
+
+    assert_raise(LocalJumpError) {Enumerator::Generator.new}
+    assert_raise(TypeError) {Enumerator::Generator.new(1)}
+    obj = eval("class C\u{1f5ff}; self; end").new
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) {
+      Enumerator::Generator.new(obj)
+    }
   end
 
   def test_generator_args
diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index b4567d9187..af69d86d6b 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -302,6 +302,10 @@ class TestException < Test::Unit::TestCase
     assert_raise_with_message(TypeError, /C\u{4032}/) do
       [*o]
     end
+    obj = eval("class C\u{1f5ff}; self; end").new
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) do
+      Class.new {include obj}
+    end
   end
 
   def test_errat
diff --git a/test/ruby/test_time.rb b/test/ruby/test_time.rb
index f4fb5bf3b3..97c6288f4d 100644
--- a/test/ruby/test_time.rb
+++ b/test/ruby/test_time.rb
@@ -417,6 +417,11 @@ class TestTime < Test::Unit::TestCase
       }
     }
     assert_raise(ArgumentError) { m.sleep(-1) }
+    assert_raise(TypeError) { m.sleep("") }
+    assert_raise(TypeError) { sleep("") }
+    obj = eval("class C\u{1f5ff}; self; end").new
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) {m.sleep(obj)}
+    assert_raise_with_message(TypeError, /C\u{1f5ff}/) {sleep(obj)}
   end
 
   def test_to_f