diff --git a/app/views/graders/list.html.haml b/app/views/graders/list.html.haml
--- a/app/views/graders/list.html.haml
+++ b/app/views/graders/list.html.haml
@@ -54,8 +54,8 @@
         - @submission.each do |sub|
           %tr.inactive
             %td= link_to sub.id, submission_path(sub.id)
-            %td= link_to sub.try(:user).try(:full_name), stat_user_path(sub.user.id)
-            %td= link_to sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id)
+            %td= ("" unless sub.user) || link_to sub.try(:user).try(:full_name), stat_user_path(sub.user.id)
+            %td= ("" unless sub.problem) || link_to sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id)
             %td= "#{time_ago_in_words(sub.submitted_at)} ago"
             %td= sub.graded_at ? "#{time_ago_in_words(sub.graded_at)} ago" : " "
             %td= sub.grader_comment
@@ -72,8 +72,8 @@
         - @backlog_submission.each do |sub|
           %tr.inactive
             %td= link_to sub.id, submission_path(sub.id)
-            %td= link_to sub.try(:user).try(:full_name), stat_user_path(sub.user.id)
-            %td= link_to sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id)
+            %td= ("" unless sub.user) || link_to sub.try(:user).try(:full_name), stat_user_path(sub.user.id)
+            %td= ("" unless sub.problem) || link_to sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id)
             %td= "#{time_ago_in_words(sub.submitted_at)} ago"
             %td= sub.graded_at ? "#{time_ago_in_words(sub.graded_at)} ago" : " "
             %td= sub.grader_comment
diff --git a/app/views/submissions/show.html.haml b/app/views/submissions/show.html.haml
--- a/app/views/submissions/show.html.haml
+++ b/app/views/submissions/show.html.haml
@@ -77,6 +77,11 @@
           %td.text-right
             %strong Memory (kb)
           %td #{@submission.peak_memory}
+        %tr
+          %td.text-right
+            %strong Compiler result
+          %td
+            %pre= @submission.compiler_message
         - if session[:admin]
           %tr
             %td.text-right