Only unlink bio if it is in a chain

diff --git a/src/lib/bio/bio_priv.h b/src/lib/bio/bio_priv.h
index f5149cf35bada4289be344ac8577fa35b7884e11..3e12ea128dad61c62aac83b53913bc03a7be0bbb 100644 (file)
--- a/src/lib/bio/bio_priv.h
+++ b/src/lib/bio/bio_priv.h
@@ -68,7 +68,8 @@ do { \
                rcode = fr_bio_shutdown(&my->bio); \
                if (rcode < 0) return rcode;       \
        }                                          \
-       fr_bio_unchain(&my->bio);                  \
+       if (fr_bio_prev(&my->bio) || fr_bio_next(&my->bio)) \
+               fr_bio_unchain(&my->bio);          \
 } while (0)