lib-storage: mailbox-tree - Ensure tree is not NULL

diff --git a/src/lib-storage/mailbox-tree.c b/src/lib-storage/mailbox-tree.c
index 6351a6825aadbaea9da454b3440ed0b67e3d1846..e8338a8cef150edb492e1d0555d667ab782e8637 100644 (file)
--- a/src/lib-storage/mailbox-tree.c
+++ b/src/lib-storage/mailbox-tree.c
@@ -164,6 +164,8 @@ mailbox_tree_lookup(struct mailbox_tree_context *tree, const char *path)
        struct mailbox_node *node;
        bool created;
 
+       i_assert(tree != NULL);
+
        T_BEGIN {
                node = mailbox_tree_traverse(tree, path, FALSE, &created);
        } T_END;