1 files changed, 39 insertions, 0 deletions
diff --git a/ext/-test-/marshal/internal_ivar/internal_ivar.c b/ext/-test-/marshal/internal_ivar/internal_ivar.c
new file mode 100644
index 0000000000..299da27f23
--- /dev/null
+++ b/ext/-test-/marshal/internal_ivar/internal_ivar.c
@@ -0,0 +1,39 @@
+#include <ruby.h>
+
+static ID id_normal_ivar, id_internal_ivar;
+
+static VALUE
+init(VALUE self, VALUE arg1, VALUE arg2)
+{
+    rb_ivar_set(self, id_normal_ivar, arg1);
+    rb_ivar_set(self, id_internal_ivar, arg2);
+    return self;
+}
+
+static VALUE
+get_normal(VALUE self)
+{
+    return rb_attr_get(self, id_normal_ivar);
+}
+
+static VALUE
+get_internal(VALUE self)
+{
+    return rb_attr_get(self, id_internal_ivar);
+}
+
+void
+Init_internal_ivar(void)
+{
+    VALUE mMarshal = rb_define_module_under(rb_define_module("Bug"), "Marshal");
+    VALUE newclass = rb_define_class_under(mMarshal, "InternalIVar", rb_cObject);
+
+    id_normal_ivar = rb_intern_const("normal");
+#if 0
+    /* leave id_internal_ivar being 0 */
+    id_internal_ivar = rb_make_internal_id();
+#endif
+    rb_define_method(newclass, "initialize", init, 2);
+    rb_define_method(newclass, "normal", get_normal, 0);
+    rb_define_method(newclass, "internal", get_internal, 0);
+}