--- loncom/lonnet/perl/lonnet.pm	2018/12/05 03:29:11	1.1392
+++ loncom/lonnet/perl/lonnet.pm	2018/12/08 15:17:25	1.1394
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1392 2018/12/05 03:29:11 raeburn Exp $
+# $Id: lonnet.pm,v 1.1394 2018/12/08 15:17:25 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -711,6 +711,7 @@ sub check_for_valid_session {
 
     if (!defined($disk_env{'user.name'})
 	|| !defined($disk_env{'user.domain'})) {
+        untie(%disk_env);
 	return undef;
     }
 
@@ -723,6 +724,7 @@ sub check_for_valid_session {
             $userhashref->{'ltiuri'} = $disk_env{'request.lti.uri'};
         }
     }
+    untie(%disk_env);
 
     return $handle;
 }
@@ -1643,7 +1645,6 @@ sub check_balancer_result {
                 $is_balancer = 1;
                 $currtargets = $result->{'targets'};
                 $currrules = $result->{'rules'};
-                $dom_balancers = $currbalancer;
             }
             $dom_balancers = $currbalancer;
         } else {
@@ -5354,8 +5355,8 @@ sub set_first_access {
     my $firstaccess=&get_first_access($type,$symb,$map);
     if ($firstaccess) {
         &logthis("First access time already set ($firstaccess) when attempting ".
-                 "to set new value (type: $type, extent: $res) for $uname:$udom ". 
-                 "in $courseid"); 
+                 "to set new value (type: $type, extent: $res) for $uname:$udom ".
+                 "in $courseid");
         return 'already_set';
     } else {
         my $start = time;