ObjectSpace._id2ref should not support unshareable

ObjectSpace._id2ref(id) can return any objects even if they are
unshareable, so this patch raises RangeError if it runs on multi-ractor
mode and the found object is unshareable.

1 files changed, 13 insertions, 0 deletions

diff --git a/bootstraptest/test_ractor.rb b/bootstraptest/test_ractor.rb
index 125b51bf4f..2bbf823f37 100644
--- a/bootstraptest/test_ractor.rb
+++ b/bootstraptest/test_ractor.rb
@@ -919,6 +919,19 @@ assert_equal '0', %q{
   }.take
 }
 
+# ObjectSpace._id2ref can not handle unshareable objects with Ractors
+assert_equal 'ok', %q{
+  s = 'hello'
+
+  Ractor.new s.object_id do |id ;s|
+    begin
+      s = ObjectSpace._id2ref(id)
+    rescue => e
+      :ok
+    end
+  end.take
+}
+
 # Ractor.make_shareable(obj)
 assert_equal 'true', %q{
   class C