variable.c: fix autoload object lifetimes and leak

We must not call normal Hash methods inside GC free callback,
either, however identity hash may be used.

[ruby-core:86935] [Bug #14742]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63389 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ruby/test_autoload.rb b/test/ruby/test_autoload.rb
index 6d51c16927..8311c40c35 100644
--- a/test/ruby/test_autoload.rb
+++ b/test/ruby/test_autoload.rb
@@ -335,6 +335,18 @@ p Foo::Bar
     end
   end
 
+  def test_no_leak
+    assert_no_memory_leak([], '', <<~'end;', 'many autoloads', timeout: 30)
+      200000.times do |i|
+        m = Module.new
+        m.instance_eval do
+          autoload :Foo, 'x'
+          autoload :Bar, i.to_s
+        end
+      end
+    end;
+  end
+
   def add_autoload(path)
     (@autoload_paths ||= []) << path
     ::Object.class_eval {autoload(:AutoloadTest, path)}