#297952 by aaron: Fix naming conflict with 'file' preprocess variable.

includes/theme.inc

@@ -999,18 +999,19 @@ function theme_get_setting($setting_name, $refresh = FALSE) {
 /**
  * Render a system default template, which is essentially a PHP template.
  *
- * @param $file
- *   The filename of the template to render.
+ * @param $template_file
+ *   The filename of the template to render. Note that this will overwrite
+ *   anything stored in $variables['template_file'] if using a preprocess hook.
  * @param $variables
  *   A keyed array of variables that will appear in the output.
  *
  * @return
  *   The output generated by the template.
  */
-function theme_render_template($file, $variables) {
+function theme_render_template($template_file, $variables) {
   extract($variables, EXTR_SKIP);               // Extract the variables to a local namespace
   ob_start();                                   // Start output buffering
-  include DRUPAL_ROOT . '/' . $file;   // Include the file
+  include DRUPAL_ROOT . '/' . $template_file;   // Include the template file
   $contents = ob_get_contents();                // Get the contents of the buffer
   ob_end_clean();                               // End buffering and discard
   return $contents;                             // Return the contents