Catch render errors and display 'Couldn't find anything' instead of stacktrace

app/views/crawlers/theses_crawler/show_basic.html.erb

@@ -1,20 +1,24 @@
 <h1>Results for "<%= params[:search_term] %>"</h1>
 
 <ul class="theses-list">
-  <% @theses.each_with_index do |thesis| %>
-    <li class="thesis">
-      <%= link_to crawlers_theses_crawler_show_detail_url(:id => thesis['id'], :title => thesis['title']) do %>
+  <% if @theses %>
+    <% @theses.each_with_index do |thesis| %>
+      <li class="thesis">
+        <%= link_to crawlers_theses_crawler_show_detail_url(:id => thesis['id'], :title => thesis['title']) do %>
       <span class="list-link">
           <span class="thesis-title">
             <%= thesis['title'] %>
           </span>
       </span>
-      <% end %>
-      <span class="add-to-fav">
+        <% end %>
+        <span class="add-to-fav">
         <%= link_to crawlers_theses_crawler_add_to_fav_url(:id => thesis['id'], :title => thesis['title']) do %>
           <%= show_svg('favorite-24px.svg') %>
         <% end %>
       </span>
-    </li>
+      </li>
+    <% end %>
+  <% else %>
+    Could not find anything... Please try again.
   <% end %>
 </ul>