From e6bcd3e44c14785a14ee1321c95d4644227f1565 Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@rc-d.net>
Date: Thu, 27 Sep 2018 07:39:53 -0400
Subject: [PATCH] Fix issue processwire/processwire-issues#712 to correct issue
 with $config->sessionHistory=1; setting not working correctly

---
 wire/core/Session.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/wire/core/Session.php b/wire/core/Session.php
index 17eede32..4fe27fb1 100644
--- a/wire/core/Session.php
+++ b/wire/core/Session.php
@@ -1199,7 +1199,13 @@ class Session extends Wire implements \IteratorAggregate {
 				end($history);
 				$lastKey = key($history);
 				$nextKey = $lastKey+1;
-				if($cnt >= $historyCnt) $history = array_slice($history, -1 * ($historyCnt-1), null, true); 
+				if($cnt >= $historyCnt) { 
+					if($historyCnt > 1) {
+						$history = array_slice($history, -1 * ($historyCnt - 1), null, true);
+					} else {
+						$history = array();
+					}
+				}
 			} else {
 				$nextKey = 0;
 			}