merge revision(s) 0c6e24d102e894a7211a596e6aa95828b1cf4406: [Backport #18600]

	Fix visibility of alias of zsuper methods

	This was broken by 71c746379d5872e250d90ae45c585760afaf9516.

	Fixes [Bug #18600]
	---
	 test/ruby/test_alias.rb | 10 ++++++++++
	 vm_method.c             |  1 +
	 2 files changed, 11 insertions(+)

1 files changed, 10 insertions, 0 deletions

diff --git a/test/ruby/test_alias.rb b/test/ruby/test_alias.rb
index 99f2223b49..0d33cb993c 100644
--- a/test/ruby/test_alias.rb
+++ b/test/ruby/test_alias.rb
@@ -265,6 +265,16 @@ class TestAlias < Test::Unit::TestCase
     end;
   end
 
+  class C2
+    public :system
+    alias_method :bar, :system
+    alias_method :system, :bar
+  end
+
+  def test_zsuper_alias_visibility
+    assert(C2.new.respond_to?(:system))
+  end
+
   def test_alias_memory_leak
     assert_no_memory_leak([], "#{<<~"begin;"}", "#{<<~'end;'}", rss: true)
     begin;