Ensure T_OBJECT and T_IMEMO/fields have identical layout

1 files changed, 4 insertions, 0 deletions

diff --git a/shape.h b/shape.h
index 065d375907..3541b7baf4 100644
--- a/shape.h
+++ b/shape.h
@@ -351,6 +351,8 @@ ROBJECT_FIELDS_HASH(VALUE obj)
 {
     RBIMPL_ASSERT_TYPE(obj, RUBY_T_OBJECT);
     RUBY_ASSERT(rb_shape_obj_too_complex_p(obj));
+    RUBY_ASSERT(!FL_TEST_RAW(obj, ROBJECT_EMBED));
+
     return (st_table *)ROBJECT(obj)->as.heap.fields;
 }
 
@@ -359,6 +361,8 @@ ROBJECT_SET_FIELDS_HASH(VALUE obj, const st_table *tbl)
 {
     RBIMPL_ASSERT_TYPE(obj, RUBY_T_OBJECT);
     RUBY_ASSERT(rb_shape_obj_too_complex_p(obj));
+    RUBY_ASSERT(!FL_TEST_RAW(obj, ROBJECT_EMBED));
+
     ROBJECT(obj)->as.heap.fields = (VALUE *)tbl;
 }