fixes #2312

app/controllers/application_controller.rb

@@ -14,6 +14,7 @@ class ApplicationController < ActionController::Base
 
   rescue_from User::PrivilegeError, :with => :access_denied
   rescue_from Danbooru::Paginator::PaginationError, :with => :render_pagination_limit
+  rescue_from Exception, :with => :rescue_exception
 
 protected
   def api_check

app/views/static/error.html.erb

@@ -1,5 +1,11 @@
-<% if @error_message %>
-  <p><%= @error_message %></p>
+<% if CurrentUser.user.is_builder? %>
+  <h1><%= @exception.class.to_s %> exception raised</h1>
+  <ul style="font-family: monospace; font-size: 1.2em; list-style-type: none;">
+    <li><%= @exception.message %></li>
+    <%- @exception.backtrace.each do |b| -%>
+      <li style="list-style-type: none;"><%= b %></li>
+    <%- end -%>
+  </ul>
 <% else %>
-  <p>Error: <%= @exception.to_s %></p>
+  <p><%= @exception.message %></p>
 <% end %>