Revert "Reserve 2 bits for expressing object layout (#17139)"HEADmaster

This reverts commit 63d9f090b5d9461cf0b9446e0039d9c56156b826.

1 files changed, 1 insertions, 1 deletions

diff --git a/ractor.c b/ractor.c
index f94c06cc73..d611ca97c2 100644
--- a/ractor.c
+++ b/ractor.c
@@ -2015,7 +2015,7 @@ move_enter(VALUE obj, struct obj_traverse_replace_data *data)
     else {
         VALUE type = RB_BUILTIN_TYPE(obj);
         size_t slot_size = rb_gc_obj_slot_size(obj);
-        VALUE moved = rb_newobj(GET_EC(), 0, type, RBASIC_SHAPE_ID(obj), wb_protected_types[type], slot_size);
+        VALUE moved = rb_newobj(GET_EC(), 0, type, 0, wb_protected_types[type], slot_size);
         MEMZERO(((struct RBasic *)moved) + 1, char, slot_size - sizeof(struct RBasic));
         data->replacement = (VALUE)moved;
         return traverse_cont;