Incorrect error on view source over https

Got the following when viewing source for a thank you page for CiviEvent (I was trying to find .tpl file to change formatting). Since it might confuse some folks, thought I'd file an issue as it directs:

<p>backTrace</p><p><pre>/home/cividrupal/htdocs/sites/all/modules/civicrm/CRM/Core/Error.php, backtrace, 258
/home/cividrupal/htdocs/sites/all/modules/civicrm/CRM/Core/DAO.php, fatal, 627
/home/cividrupal/htdocs/sites/all/modules/civicrm/CRM/Event/StateMachine/Registration.php, getFieldValue, 57
/home/cividrupal/htdocs/sites/all/modules/civicrm/CRM/Event/Controller/Registration.php, __construct, 47
/home/cividrupal/htdocs/sites/all/modules/civicrm/CRM/Event/Invoke.php, __construct, 99
/home/cividrupal/htdocs/sites/all/modules/civicrm/CRM/Core/Component.php, main, 130
/home/cividrupal/htdocs/sites/all/modules/civicrm/CRM/Core/Invoke.php, invoke, 158
/home/cividrupal/htdocs/sites/all/modules/civicrm/drupal/civicrm.module, invoke, 329
, civicrm_invoke,
/home/cividrupal/htdocs/includes/menu.inc, call_user_func_array, 418
/home/cividrupal/htdocs/index.php, menu_execute_active_handler, 15</pre></p><p></p><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">

<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<base href="http://events.socialinnovation.ca/sites/all/modules/civicrm/" />
<style type="text/css" media="screen">@import url(http://events.socialinnovation.ca/sites/all/modules/civicrm/css/civicrm.css);</style>
</head>

<body>

<div id="crm-container" lang="en" xml:lang="en">

<div class="messages status">
<dl>
<dt><img src="http://events.socialinnovation.ca/sites/all/modules/civicrm/i/Error.gif" alt="unrecoverable error" /></dt>
<dd>
Sorry. A non-recoverable error has occurred. <p>We experienced an unexpected error. Please file an issue with the backtrace</p>
<p><a href="http://events.socialinnovation.ca/" title="Main Menu">Return to home page.</a></p>

</dd>
</dl>
</div>

</div>
</body>
</html>