From 4d21684f61cd19dfd441eac10b2a61bbf32e20eb Mon Sep 17 00:00:00 2001
From: simon <simon@cda61777-01e9-0310-a592-d414129be87e>
Date: Thu, 11 Jan 2007 09:42:59 +0000
Subject: [PATCH] Duplicate fix of Kevin Lyles's bug from r7092.

git-svn-id: svn://svn.tartarus.org/sgt/library@7094 cda61777-01e9-0310-a592-d414129be87e
---
 tree234.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/tree234.c b/tree234.c
index bc88039..257c978 100644
--- a/tree234.c
+++ b/tree234.c
@@ -1440,8 +1440,11 @@ tree234 *copytree234(tree234 *t, copyfn234 copyfn, void *copyfnstate) {
     tree234 *t2;
 
     t2 = newtree234(t->cmp);
-    t2->root = copynode234(t->root, copyfn, copyfnstate);
-    t2->root->parent = NULL;
+    if (t->root) {
+	t2->root = copynode234(t->root, copyfn, copyfnstate);
+	t2->root->parent = NULL;
+    } else
+	t2->root = NULL;
 
     return t2;
 }
@@ -2122,11 +2125,12 @@ int main(void) {
     tree = newtree234(mycmp);
     cmp = mycmp;
     arraylen = 0;
-    for (i = 0; i < 16; i++) {
-	addtest(strings[i]);
+    for (i = 0; i < 17; i++) {
 	tree2 = copytree234(tree, NULL, NULL);
 	splittest(tree2, array, arraylen);
 	freetree234(tree2);
+	if (i < 16)
+	    addtest(strings[i]);
     }
     freetree234(tree);
 
-- 
2.11.0