From c45dd4d4826704471cf9ff2c7869065236dd174e Mon Sep 17 00:00:00 2001
From: Maciej Mensfeld <maciej@mensfeld.pl>
Date: Fri, 30 Aug 2019 11:24:33 +0200
Subject: [PATCH] Make the dot-colon method reference frozen

[Feature #16103]

Close: https://github.com/ruby/ruby/pull/2267
---
 insns.def                |  2 +-
 test/ruby/test_method.rb | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/insns.def b/insns.def
index 3b82d4ec93..7fb7a577c8 100644
--- a/insns.def
+++ b/insns.def
@@ -699,7 +699,7 @@ checktype
     ret = (TYPE(val) == (int)type) ? Qtrue : Qfalse;
 }
 
-/* get method reference. */
+/* get frozen method reference. */
 DEFINE_INSN
 methodref
 (ID id)
diff --git a/test/ruby/test_method.rb b/test/ruby/test_method.rb
index 1d59ddb594..d85f9010c7 100644
--- a/test/ruby/test_method.rb
+++ b/test/ruby/test_method.rb
@@ -1141,6 +1141,19 @@ class TestMethod < Test::Unit::TestCase
     assert_nil(o.method(:foo))
   end
 
+  def test_method_reference_freeze_state
+    m = 1.:succ
+    assert_predicate(m, :frozen?, "dot-symbol method reference should be frozen")
+    m = 1.method(:succ)
+    assert_not_predicate(m, :frozen?, "#method method reference should not be frozen")
+    o = Object.new
+    def o.foo; 42; end
+    m = o.:foo
+    assert_predicate(m, :frozen?, "dot-symbol method reference should be frozen")
+    m = o.method(:foo)
+    assert_not_predicate(m, :frozen?, "#method method reference should not be frozen")
+  end
+
   def test_umethod_bind_call
     foo = Base.instance_method(:foo)
     assert_equal(:base, foo.bind_call(Base.new))