- Grob *s = (Grob *) SCM_CELL_WORD_1 (ses);
- scm_gc_mark (s->immutable_property_alist_);
-
- if (s->key_)
- scm_gc_mark (s->key_->self_scm ());
- for (int a = 0; a < 2; a++)
- {
- scm_gc_mark (s->dim_cache_[a].offset_callbacks_);
- scm_gc_mark (s->dim_cache_[a].dimension_);
- scm_gc_mark (s->dim_cache_[a].dimension_callback_);
-
- /* Do not mark the parents. The pointers in the mutable
- property list form two tree like structures (one for X
- relations, one for Y relations). Marking these can be done
- in limited stack space. If we add the parents, we will jump
- between X and Y in an erratic manner, leading to much more
- recursion depth (and core dumps if we link to pthreads). */
- }
-
- if (s->original_)
- scm_gc_mark (s->original_->self_scm ());
-
- s->derived_mark ();
- scm_gc_mark (s->object_alist_);
- scm_gc_mark (s->interfaces_);
-
- return s->mutable_property_alist_;
+ ASSERT_LIVE_IS_ALLOWED (self_scm ());
+
+ scm_gc_mark (immutable_property_alist_);
+
+ /* Do not mark the parents. The pointers in the mutable
+ property list form two tree like structures (one for X
+ relations, one for Y relations). Marking these can be done
+ in limited stack space. If we add the parents, we will jump
+ between X and Y in an erratic manner, leading to much more
+ recursion depth (and core dumps if we link to pthreads). */
+
+ if (original ())
+ scm_gc_mark (original ()->self_scm ());
+
+ derived_mark ();
+ scm_gc_mark (object_alist_);
+ scm_gc_mark (interfaces_);
+
+ return mutable_property_alist_;