From 2a1929b97eaaf3f84d1b90f840ba1ed74030d597 Mon Sep 17 00:00:00 2001
From: Alex Goodman <wagoodman@gmail.com>
Date: Fri, 1 Jun 2018 17:35:04 -0400
Subject: [PATCH] fix tree copy ref to parent tree

---
 filetree.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/filetree.go b/filetree.go
index 4e2d2c3..1c7965c 100644
--- a/filetree.go
+++ b/filetree.go
@@ -93,6 +93,10 @@ func (tree *FileTree) Copy() *FileTree {
 	newTree := NewTree()
 	*newTree = *tree
 	newTree.root = tree.Root().Copy()
+	newTree.Visit(func(node *FileNode) error {
+		node.tree = newTree
+		return nil
+	})
 
 	return newTree
 }