From b655041650f496fc7367e2c5140c5835507b9e73 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Thu, 13 Aug 2020 23:50:56 +0200
Subject: Fix potential null pointer dereference

---
 zix/btree.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'zix')

diff --git a/zix/btree.c b/zix/btree.c
index 0300523..c81b283 100644
--- a/zix/btree.c
+++ b/zix/btree.c
@@ -661,6 +661,9 @@ zix_btree_lower_bound(const ZixBTree* const t,
 	if (!t) {
 		*ti = NULL;
 		return ZIX_STATUS_BAD_ARG;
+	} else if (!t->root) {
+		*ti = NULL;
+		return ZIX_STATUS_SUCCESS;
 	}
 
 	ZixBTreeNode* n           = t->root;
-- 
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