1 files changed, 12 insertions, 1 deletions
diff --git a/iseq.c b/iseq.c
index 7fbb906525..4298130b65 100644
--- a/iseq.c
+++ b/iseq.c
@@ -427,11 +427,22 @@ rb_iseq_memsize(const rb_iseq_t *iseq)
     return size;
 }
 
+static unsigned long fresh_iseq_unique_id = 0; /* -- Remove In 3.0 -- */
+
+struct rb_iseq_constant_body *
+rb_iseq_constant_body_alloc(void)
+{
+    struct rb_iseq_constant_body *iseq_body;
+    iseq_body = ZALLOC(struct rb_iseq_constant_body);
+    iseq_body->iseq_unique_id = fresh_iseq_unique_id++; /* -- Remove In 3.0 -- */
+    return iseq_body;
+}
+
 static rb_iseq_t *
 iseq_alloc(void)
 {
     rb_iseq_t *iseq = iseq_imemo_alloc();
-    iseq->body = ZALLOC(struct rb_iseq_constant_body);
+    iseq->body = rb_iseq_constant_body_alloc();
     return iseq;
 }