diff --git a/src/applications/maniphest/storage/ManiphestTask.php b/src/applications/maniphest/storage/ManiphestTask.php
index bde61e34c2ee90c6e6acdb5ea584b32e00dcac99..55363c4008cd5c612ffa7ccb93b23f5cfb012230 100644
--- a/src/applications/maniphest/storage/ManiphestTask.php
+++ b/src/applications/maniphest/storage/ManiphestTask.php
@@ -430,10 +430,17 @@ final class ManiphestTask extends ManiphestDAO
     $children = $this->loadDependsOnTaskPHIDs();
 
     foreach ($children as $child) {
-      $task = id(new ManiphestTaskQuery())
-        ->setViewer($viewer)
-        ->withPHIDs(array($child))
-        ->executeOne();
+      try {
+        $task = id(new ManiphestTaskQuery())
+          ->setViewer($viewer)
+          ->withPHIDs(array($child))
+          ->executeOne();
+      } catch (Exception $e) {
+        $task = null;
+      }
+      if (!$task) {
+        continue;
+      }
 
       $child_progress = $task->getTaskProgress($viewer);