Fix compaction for generic ivars

When generic instance variable has a shape, it is marked movable. If it
it transitions to too complex, it needs to update references otherwise
it may have incorrect references.

2 files changed, 4 insertions, 1 deletions

diff --git a/internal/gc.h b/internal/gc.h
index 188497b007..34a6043e8a 100644
--- a/internal/gc.h
+++ b/internal/gc.h
@@ -250,6 +250,8 @@ void rb_gc_mark_and_move(VALUE *ptr);
 void rb_gc_mark_weak(VALUE *ptr);
 void rb_gc_remove_weak(VALUE parent_obj, VALUE *ptr);
 
+void rb_gc_ref_update_table_values_only(st_table *tbl);
+
 #define rb_gc_mark_and_move_ptr(ptr) do { \
     VALUE _obj = (VALUE)*(ptr); \
     rb_gc_mark_and_move(&_obj); \
diff --git a/internal/variable.h b/internal/variable.h
index 63b074a308..b2a30c7c58 100644
--- a/internal/variable.h
+++ b/internal/variable.h
@@ -53,7 +53,8 @@ void rb_evict_ivars_to_hash(VALUE obj);
 
 RUBY_SYMBOL_EXPORT_BEGIN
 /* variable.c (export) */
-void rb_mark_and_update_generic_ivar(VALUE);
+void rb_mark_generic_ivar(VALUE obj);
+void rb_ref_update_generic_ivar(VALUE);
 void rb_mv_generic_ivar(VALUE src, VALUE dst);
 VALUE rb_const_missing(VALUE klass, VALUE name);
 int rb_class_ivar_set(VALUE klass, ID vid, VALUE value);