1 files changed, 2 insertions, 0 deletions
diff --git a/compile.c b/compile.c
index 995ff8930c..f858fbb681 100644
--- a/compile.c
+++ b/compile.c
@@ -8203,6 +8203,8 @@ ibf_load_iseq(const struct ibf_load *load, const rb_iseq_t *index_iseq)
 static void
 ibf_load_setup(struct ibf_load *load, VALUE loader_obj, VALUE str)
 {
+    rb_check_safe_obj(str);
+
     if (RSTRING_LENINT(str) < (int)sizeof(struct ibf_header)) {
 	rb_raise(rb_eRuntimeError, "broken binary format");
     }