From eee15f6c6cc793c190d69e3202aaf28e20cdcc33 Mon Sep 17 00:00:00 2001
From: Cassio de Campos <cassiopc@gmail.com>
Date: Tue, 29 Aug 2017 12:35:29 +0100
Subject: bug fix

---
 src/private/autojudging.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/private/autojudging.php')

diff --git a/src/private/autojudging.php b/src/private/autojudging.php
index d8580b5..afe0d05 100755
--- a/src/private/autojudging.php
+++ b/src/private/autojudging.php
@@ -603,7 +603,9 @@ while(42) {
   }
   if($retval >= 7 && $retval <= 9) {
     $ans = file("allout");
-    $anstmp = substr(trim(escape_string($ans[count($ans)-1])),0,100);
+    $anstmp = '';
+    if(count($ans) > 0)
+      $anstmp = substr(trim(escape_string($ans[count($ans)-1])),0,100);
     unset($ans);
     $answer = "(probably runtime error - unusual code: $retval) " . $anstmp;
     // runtime error
-- 
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