[LON-CAPA-cvs] cvs: loncom /homework grades.pm

[raeburn]

raeburn		Mon Feb  8 01:09:37 2010 EDT

  Modified files:              
    /loncom/homework	grades.pm 
  Log:
  - Prevent ISE.
   Can be triggered if a user has multiple tabs open switched course,
   then tries to view grading screen in originally selected course. 
  
  
Index: loncom/homework/grades.pm
diff -u loncom/homework/grades.pm:1.592 loncom/homework/grades.pm:1.593
--- loncom/homework/grades.pm:1.592	Fri Feb  5 14:52:28 2010
+++ loncom/homework/grades.pm	Mon Feb  8 01:09:36 2010
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.592 2010/02/05 14:52:28 bisitz Exp $
+# $Id: grades.pm,v 1.593 2010/02/08 01:09:36 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -160,6 +160,10 @@
         return;
     }
     my $res = $navmap->getBySymb($symb);
+    unless (ref($res)) {
+        $$response_error = 1;
+        return;
+    }
     my $partlist = $res->parts();
     my %vPart = 
 	map { $_ => 1 } (&Apache::loncommon::get_env_multiple('form.vPart'));