bugfix: several seq_iter kinds need clone operation.

Several seq_iter_t kinds of objects cannot be correctly
bitwise copied, because they point to an iterator object
that cannot be shared.

* lib.c (seq_iter_clone_op): New static function.
(si_hash_ops, si_tree_ops, si_oop_ops, si_fast_oop_ops):
Use seq_iter_clone_op, which uses the copy function
to duplicate it->ui.iter after doing a bitwise copy of
the structure.

* lib.h (seq_iter_ops_init_full): New macro.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index 18037392..0c300e8a 100644
--- a/lib.h
+++ b/lib.h
@@ -474,6 +474,8 @@ struct seq_iter_ops {
 #define seq_iter_ops_init_mark(get, peek, mark) { get, peek, mark, 0 }
 #define seq_iter_ops_init_clone(get, peek, clone) \
   { get, peek, seq_iter_mark_op, clone }
+#define seq_iter_ops_init_full(get, peek, mark, clone) \
+  { get, peek, mark, clone }
 
 typedef struct seq_build {
   val obj;