diff --git a/src/applications/differential/parser/DifferentialChangesetParser.php b/src/applications/differential/parser/DifferentialChangesetParser.php
--- a/src/applications/differential/parser/DifferentialChangesetParser.php
+++ b/src/applications/differential/parser/DifferentialChangesetParser.php
@@ -1327,6 +1327,10 @@
     $not_covered = 0;
 
     foreach ($this->new as $k => $new) {
+      if ($new === null) {
+        continue;
+      }
+
       if (!$new['line']) {
         continue;
       }