Add missing WB for iseq

The write barrier wasn't being called for this object, so add the
missing WB.  Automatic compaction moved the reference because it didn't
know about the relationship (that's how I found the missing WB).

1 files changed, 1 insertions, 0 deletions

diff --git a/compile.c b/compile.c
index 2672b3b2e0..6aca1230af 100644
--- a/compile.c
+++ b/compile.c
@@ -8334,6 +8334,7 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *node, in
 	debugp_param("lit", node->nd_lit);
 	if (!popped) {
 	    ADD_INSN1(ret, line, putobject, node->nd_lit);
+            RB_OBJ_WRITTEN(iseq, Qundef, node->nd_lit);
 	}
 	break;
       }