Revert change to wait for a more proper fix

source/modules/helpers/theme_helpers.js

@@ -158,7 +158,9 @@ module.exports = (dust) => {
     return chunk.map((chunk) => {
       const locals = context.options.locals;
       const MakeUrl = require(Path.join(__basedir, 'source/modules/make_url.js'))(locals.Settings);
+
       let isEditor = context.options.locals.isEditor;
+      let toolbar = Path.join(__basedir, 'source/views/partials/theme_toolbar.dust');
       let script = MakeUrl.raw('assets/js/tinymce.bundle.js');
       let html = '';
 
@@ -177,35 +179,13 @@ module.exports = (dust) => {
       html += '\n';
 
       // Render the theme toolbar partial
-      //
-      // Note: for some reason, the method of rendering partials shown below causes a stack overflow
-      // when caching is enabled. This workaround compiles the theme toolbar on the fly, which is
-      // undesirable. However, it won't affect performance much since it only affects authenticated
-      // users. This is not a good way to render partials for all pages.
-      //
-      // Rendering partials from within helpers isn't covered by the docs so, for reference, the
-      // previous approach of rendering a partial looked like this:
-      //
-      //  chunk.partial(templatePath, context).end();
-      //
       if(locals.User) {
-        // Render the theme toolbar for authenticated users
-        let path = Path.join(__basedir, 'source/views/partials/theme_toolbar.dust');
-        let src = Fs.readFileSync(path, 'utf8');
-        let themeToolbar = dust.compile(src, 'theme_toolbar');
-
-        // Render the theme toolbar template in the current context
-        dust.loadSource(themeToolbar);
-        dust.render('theme_toolbar', context, (err, result) => {
-          html += result;
-          chunk = chunk.write(html);
-          return chunk.end();
-        });
-      } else {
-        // For unauthenticated users, dump what we have
-        chunk = chunk.write(html);
-        return chunk.end();
+        chunk.partial(toolbar, context).end();
       }
+
+      chunk.write(html);
+
+      return chunk.end();
     });
   };