1 files changed, 3 insertions, 0 deletions
diff --git a/refs.c b/refs.c
index ba14105959..5dc2473fbb 100644
--- a/refs.c
+++ b/refs.c
@@ -790,6 +790,9 @@ int ref_transaction_update(struct ref_transaction *transaction,
 	if (transaction->state != REF_TRANSACTION_OPEN)
 		die("BUG: update called for transaction that is not open");
 
+	if ((flags & REF_ISPRUNING) && !(flags & REF_NODEREF))
+		die("BUG: REF_ISPRUNING set without REF_NODEREF");
+
 	if (new_sha1 && !is_null_sha1(new_sha1) &&
 	    check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
 		strbuf_addf(err, "refusing to update ref with bad name '%s'",