From ba950921642b407964c62b9d612e9b0ed6754ee5 Mon Sep 17 00:00:00 2001
From: David Grudl <david@grudl.com>
Date: Sat, 2 Nov 2019 21:07:00 +0100
Subject: [PATCH] Dumper::truncateString() fixed for ''

---
 src/Tracy/Dumper/Dumper.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Tracy/Dumper/Dumper.php b/src/Tracy/Dumper/Dumper.php
index 45dec5672..b64638bc6 100644
--- a/src/Tracy/Dumper/Dumper.php
+++ b/src/Tracy/Dumper/Dumper.php
@@ -539,12 +539,13 @@ public static function truncateString(string $s, int $maxLength): string
 			$s = mb_substr($s, 0, $maxLength, 'UTF-8');
 		} else {
 			$i = $len = 0;
-			do {
+			while (isset($s[$i])) {
 				if (($s[$i] < "\x80" || $s[$i] >= "\xC0") && (++$len > $maxLength)) {
 					$s = substr($s, 0, $i);
 					break;
 				}
-			} while (isset($s[++$i]));
+				$i++;
+			}
 		}
 		return $s;
 	}