Index: src/__phutil_library_map__.php
===================================================================
--- src/__phutil_library_map__.php
+++ src/__phutil_library_map__.php
@@ -81,6 +81,7 @@
     'AphrontRequestTestCase' => 'aphront/__tests__/AphrontRequestTestCase.php',
     'AphrontResponse' => 'aphront/response/AphrontResponse.php',
     'AphrontSideNavFilterView' => 'view/layout/AphrontSideNavFilterView.php',
+    'AphrontStackTraceView' => 'view/widget/AphrontStackTraceView.php',
     'AphrontTableView' => 'view/control/AphrontTableView.php',
     'AphrontTagView' => 'view/AphrontTagView.php',
     'AphrontTokenizerTemplateView' => 'view/control/AphrontTokenizerTemplateView.php',
@@ -2401,6 +2402,7 @@
     'AphrontRequestFailureView' => 'AphrontView',
     'AphrontRequestTestCase' => 'PhabricatorTestCase',
     'AphrontSideNavFilterView' => 'AphrontView',
+    'AphrontStackTraceView' => 'AphrontView',
     'AphrontTableView' => 'AphrontView',
     'AphrontTagView' => 'AphrontView',
     'AphrontTokenizerTemplateView' => 'AphrontView',
Index: src/aphront/configuration/AphrontDefaultApplicationConfiguration.php
===================================================================
--- src/aphront/configuration/AphrontDefaultApplicationConfiguration.php
+++ src/aphront/configuration/AphrontDefaultApplicationConfiguration.php
@@ -243,7 +243,9 @@
     }
 
     if (PhabricatorEnv::getEnvConfig('phabricator.developer-mode')) {
-      $trace = $this->renderStackTrace($ex->getTrace(), $user);
+      $trace = id(new AphrontStackTraceView())
+        ->setUser($user)
+        ->setTrace($ex->getTrace());
     } else {
       $trace = null;
     }
@@ -290,110 +292,4 @@
       ));
   }
 
-  private function renderStackTrace($trace, PhabricatorUser $user) {
-
-    $libraries = PhutilBootloader::getInstance()->getAllLibraries();
-
-    // TODO: Make this configurable?
-    $path = 'https://secure.phabricator.com/diffusion/%s/browse/master/src/';
-
-    $callsigns = array(
-      'arcanist' => 'ARC',
-      'phutil' => 'PHU',
-      'phabricator' => 'P',
-    );
-
-    $rows = array();
-    $depth = count($trace);
-    foreach ($trace as $part) {
-      $lib = null;
-      $file = idx($part, 'file');
-      $relative = $file;
-      foreach ($libraries as $library) {
-        $root = phutil_get_library_root($library);
-        if (Filesystem::isDescendant($file, $root)) {
-          $lib = $library;
-          $relative = Filesystem::readablePath($file, $root);
-          break;
-        }
-      }
-
-      $where = '';
-      if (isset($part['class'])) {
-        $where .= $part['class'].'::';
-      }
-      if (isset($part['function'])) {
-        $where .= $part['function'].'()';
-      }
-
-      if ($file) {
-        if (isset($callsigns[$lib])) {
-          $attrs = array('title' => $file);
-          try {
-            $attrs['href'] = $user->loadEditorLink(
-              '/src/'.$relative,
-              $part['line'],
-              $callsigns[$lib]);
-          } catch (Exception $ex) {
-            // The database can be inaccessible.
-          }
-          if (empty($attrs['href'])) {
-            $attrs['href'] = sprintf($path, $callsigns[$lib]).
-              str_replace(DIRECTORY_SEPARATOR, '/', $relative).
-              '$'.$part['line'];
-            $attrs['target'] = '_blank';
-          }
-          $file_name = phutil_tag(
-            'a',
-            $attrs,
-            $relative);
-        } else {
-          $file_name = phutil_tag(
-            'span',
-            array(
-              'title' => $file,
-            ),
-            $relative);
-        }
-        $file_name = hsprintf('%s : %d', $file_name, $part['line']);
-      } else {
-        $file_name = phutil_tag('em', array(), '(Internal)');
-      }
-
-
-      $rows[] = array(
-        $depth--,
-        $lib,
-        $file_name,
-        $where,
-      );
-    }
-    $table = new AphrontTableView($rows);
-    $table->setHeaders(
-      array(
-        'Depth',
-        'Library',
-        'File',
-        'Where',
-      ));
-    $table->setColumnClasses(
-      array(
-        'n',
-        '',
-        '',
-        'wide',
-      ));
-
-    return phutil_tag(
-      'div',
-      array('class' => 'exception-trace'),
-      array(
-        phutil_tag(
-          'div',
-          array('class' => 'exception-trace-header'),
-          pht('Stack Trace')),
-        $table->render(),
-      ));
-  }
-
 }
Index: src/aphront/response/AphrontRedirectResponse.php
===================================================================
--- src/aphront/response/AphrontRedirectResponse.php
+++ src/aphront/response/AphrontRedirectResponse.php
@@ -8,6 +8,14 @@
 class AphrontRedirectResponse extends AphrontResponse {
 
   private $uri;
+  private $stackWhenCreated;
+
+  public function __construct() {
+    if ($this->shouldStopForDebugging()) {
+      // If we're going to stop, capture the stack so we can print it out.
+      $this->stackWhenCreated = id(new Exception())->getTrace();
+    }
+  }
 
   public function setURI($uri) {
     $this->uri = $uri;
@@ -33,31 +41,44 @@
 
   public function buildResponseString() {
     if ($this->shouldStopForDebugging()) {
+      $user = new PhabricatorUser();
+
       $view = new PhabricatorStandardPageView();
       $view->setRequest($this->getRequest());
       $view->setApplicationName('Debug');
       $view->setTitle('Stopped on Redirect');
 
-      $error = new AphrontErrorView();
-      $error->setSeverity(AphrontErrorView::SEVERITY_NOTICE);
-      $error->setTitle('Stopped on Redirect');
+      $dialog = new AphrontDialogView();
+      $dialog->setUser($user);
+      $dialog->setTitle('Stopped on Redirect');
+
+      $dialog->appendParagraph(
+        pht(
+          'You were stopped here because %s is set in your configuration.',
+          phutil_tag('tt', array(), 'debug.stop-on-redirect')));
+
+      $dialog->appendParagraph(
+        pht(
+          'You are being redirected to: %s',
+          phutil_tag('tt', array(), $this->getURI())));
+
+      $dialog->addCancelButton($this->getURI(), pht('Continue'));
+
+      $dialog->appendChild(phutil_tag('br'));
 
-      $error->appendChild(phutil_tag('p', array(), pht(
-        'You were stopped here because %s is set in your configuration.',
-        phutil_tag('tt', array(), 'debug.stop-on-redirect'))));
+      $dialog->appendChild(
+        id(new AphrontStackTraceView())
+          ->setUser($user)
+          ->setTrace($this->stackWhenCreated));
 
-      $link = phutil_tag(
-        'a',
-        array(
-          'href' => $this->getURI(),
-        ),
-        $this->getURI());
+      $dialog->setIsStandalone(true);
+      $dialog->setWidth(AphrontDialogView::WIDTH_FULL);
 
-      $error->appendChild(phutil_tag('p', array(), pht(
-        'Continue to: %s',
-        $link)));
+      $box = id(new PHUIBoxView())
+        ->addMargin(PHUI::MARGIN_LARGE)
+        ->appendChild($dialog);
 
-      $view->appendChild($error);
+      $view->appendChild($box);
 
       return $view->render();
     }
Index: src/view/widget/AphrontStackTraceView.php
===================================================================
--- /dev/null
+++ src/view/widget/AphrontStackTraceView.php
@@ -0,0 +1,120 @@
+<?php
+
+final class AphrontStackTraceView extends AphrontView {
+
+  private $trace;
+
+  public function setTrace($trace) {
+    $this->trace = $trace;
+    return $this;
+  }
+
+  public function render() {
+    $user = $this->getUser();
+    $trace = $this->trace;
+
+    $libraries = PhutilBootloader::getInstance()->getAllLibraries();
+
+    // TODO: Make this configurable?
+    $path = 'https://secure.phabricator.com/diffusion/%s/browse/master/src/';
+
+    $callsigns = array(
+      'arcanist' => 'ARC',
+      'phutil' => 'PHU',
+      'phabricator' => 'P',
+    );
+
+    $rows = array();
+    $depth = count($trace);
+    foreach ($trace as $part) {
+      $lib = null;
+      $file = idx($part, 'file');
+      $relative = $file;
+      foreach ($libraries as $library) {
+        $root = phutil_get_library_root($library);
+        if (Filesystem::isDescendant($file, $root)) {
+          $lib = $library;
+          $relative = Filesystem::readablePath($file, $root);
+          break;
+        }
+      }
+
+      $where = '';
+      if (isset($part['class'])) {
+        $where .= $part['class'].'::';
+      }
+      if (isset($part['function'])) {
+        $where .= $part['function'].'()';
+      }
+
+      if ($file) {
+        if (isset($callsigns[$lib])) {
+          $attrs = array('title' => $file);
+          try {
+            $attrs['href'] = $user->loadEditorLink(
+              '/src/'.$relative,
+              $part['line'],
+              $callsigns[$lib]);
+          } catch (Exception $ex) {
+            // The database can be inaccessible.
+          }
+          if (empty($attrs['href'])) {
+            $attrs['href'] = sprintf($path, $callsigns[$lib]).
+              str_replace(DIRECTORY_SEPARATOR, '/', $relative).
+              '$'.$part['line'];
+            $attrs['target'] = '_blank';
+          }
+          $file_name = phutil_tag(
+            'a',
+            $attrs,
+            $relative);
+        } else {
+          $file_name = phutil_tag(
+            'span',
+            array(
+              'title' => $file,
+            ),
+            $relative);
+        }
+        $file_name = hsprintf('%s : %d', $file_name, $part['line']);
+      } else {
+        $file_name = phutil_tag('em', array(), '(Internal)');
+      }
+
+
+      $rows[] = array(
+        $depth--,
+        $lib,
+        $file_name,
+        $where,
+      );
+    }
+    $table = new AphrontTableView($rows);
+    $table->setHeaders(
+      array(
+        'Depth',
+        'Library',
+        'File',
+        'Where',
+      ));
+    $table->setColumnClasses(
+      array(
+        'n',
+        '',
+        '',
+        'wide',
+      ));
+
+    return phutil_tag(
+      'div',
+      array('class' => 'exception-trace'),
+      array(
+        phutil_tag(
+          'div',
+          array('class' => 'exception-trace-header'),
+          pht('Stack Trace')),
+        $table->render(),
+      ));
+  }
+
+}