diff --git a/src/applications/harbormaster/event/HarbormasterUIEventListener.php b/src/applications/harbormaster/event/HarbormasterUIEventListener.php
index 1227fbbe31..f5e6aee3e7 100644
--- a/src/applications/harbormaster/event/HarbormasterUIEventListener.php
+++ b/src/applications/harbormaster/event/HarbormasterUIEventListener.php
@@ -1,144 +1,153 @@
 <?php
 
 final class HarbormasterUIEventListener
   extends PhabricatorEventListener {
 
   public function register() {
     $this->listen(PhabricatorEventType::TYPE_UI_WILLRENDERPROPERTIES);
   }
 
   public function handleEvent(PhutilEvent $event) {
     switch ($event->getType()) {
       case PhabricatorEventType::TYPE_UI_WILLRENDERPROPERTIES:
         $this->handlePropertyEvent($event);
         break;
     }
   }
 
   private function handlePropertyEvent($ui_event) {
     $viewer = $ui_event->getUser();
     $object = $ui_event->getValue('object');
 
     if (!$object || !$object->getPHID()) {
       // No object, or the object has no PHID yet..
       return;
     }
 
     if ($object instanceof HarbormasterBuildable) {
       // Although HarbormasterBuildable implements the correct interface, it
       // does not make sense to show a build's build status. In the best case
       // it is meaningless, and in the worst case it's confusing.
       return;
     }
 
     if ($object instanceof DifferentialRevision) {
       // TODO: This is a bit hacky and we could probably find a cleaner fix
       // eventually, but we show build status on each diff, immediately below
       // this property list, so it's redundant to show it on the revision view.
       return;
     }
 
     if (!($object instanceof HarbormasterBuildableInterface)) {
       return;
     }
 
     $buildable_phid = $object->getHarbormasterBuildablePHID();
     if (!$buildable_phid) {
       return;
     }
 
     if (!$this->canUseApplication($ui_event->getUser())) {
       return;
     }
 
-    $buildable = id(new HarbormasterBuildableQuery())
-      ->setViewer($viewer)
-      ->withManualBuildables(false)
-      ->withBuildablePHIDs(array($buildable_phid))
-      ->needBuilds(true)
-      ->needTargets(true)
-      ->executeOne();
+    try {
+      $buildable = id(new HarbormasterBuildableQuery())
+        ->setViewer($viewer)
+        ->withManualBuildables(false)
+        ->withBuildablePHIDs(array($buildable_phid))
+        ->needBuilds(true)
+        ->needTargets(true)
+        ->executeOne();
+    } catch (PhabricatorPolicyException $ex) {
+      // TODO: See PHI430. When this query raises a policy exception, it
+      // fatals the whole page because it happens very late in execution,
+      // during final page rendering. If the viewer can't see the buildable or
+      // some of the builds, just hide this element for now.
+      return;
+    }
+
     if (!$buildable) {
       return;
     }
 
     $builds = $buildable->getBuilds();
 
     $targets = array();
     foreach ($builds as $build) {
       foreach ($build->getBuildTargets() as $target) {
         $targets[] = $target;
       }
     }
 
     if ($targets) {
       $artifacts = id(new HarbormasterBuildArtifactQuery())
         ->setViewer($viewer)
         ->withBuildTargetPHIDs(mpull($targets, 'getPHID'))
         ->withArtifactTypes(
           array(
             HarbormasterURIArtifact::ARTIFACTCONST,
           ))
         ->execute();
       $artifacts = mgroup($artifacts, 'getBuildTargetPHID');
     } else {
       $artifacts = array();
     }
 
     $status_view = new PHUIStatusListView();
 
     $buildable_icon = $buildable->getStatusIcon();
     $buildable_color = $buildable->getStatusColor();
     $buildable_name = $buildable->getStatusDisplayName();
 
     $target = phutil_tag(
       'a',
       array(
         'href' => '/'.$buildable->getMonogram(),
       ),
       pht('Buildable %d', $buildable->getID()));
 
     $target = phutil_tag('strong', array(), $target);
 
 
     $status_view
       ->addItem(
         id(new PHUIStatusItemView())
           ->setIcon($buildable_icon, $buildable_color, $buildable_name)
           ->setTarget($target));
 
     foreach ($builds as $build) {
       $item = new PHUIStatusItemView();
       $item->setTarget($viewer->renderHandle($build->getPHID()));
 
       $links = array();
       foreach ($build->getBuildTargets() as $build_target) {
         $uris = idx($artifacts, $build_target->getPHID(), array());
         foreach ($uris as $uri) {
           $impl = $uri->getArtifactImplementation();
           if ($impl->isExternalLink()) {
             $links[] = $impl->renderLink();
           }
         }
       }
 
       if ($links) {
         $links = phutil_implode_html(" \xC2\xB7 ", $links);
         $item->setNote($links);
       }
 
       $status = $build->getBuildStatus();
       $status_name = HarbormasterBuildStatus::getBuildStatusName($status);
       $icon = HarbormasterBuildStatus::getBuildStatusIcon($status);
       $color = HarbormasterBuildStatus::getBuildStatusColor($status);
 
       $item->setIcon($icon, $color, $status_name);
 
       $status_view->addItem($item);
     }
 
     $view = $ui_event->getValue('view');
     $view->addProperty(pht('Build Status'), $status_view);
   }
 
 }