Add missing writebarrier on complex obj dup

When we dup a complex object we need to issue a writebarrier_remember
on the new object. This was caught by wbcheck inside the rubygems test
suite.

Co-authored-by: Aaron Patterson <tenderlove@ruby-lang.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/shape.c b/shape.c
index df4faf960c..b10b52d76f 100644
--- a/shape.c
+++ b/shape.c
@@ -1180,6 +1180,7 @@ rb_shape_copy_complex_ivars(VALUE dest, VALUE obj, shape_id_t src_shape_id, st_t
         st_delete(table, &id, NULL);
     }
     rb_obj_init_too_complex(dest, table);
+    rb_gc_writebarrier_remember(dest);
 }
 
 size_t