Index: web/includes/form.inc
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- web/includes/form.inc	(revision bb49c835de15ff9599064785525fba8c552ff348)
+++ web/includes/form.inc	(revision )
@@ -1868,6 +1868,7 @@
   // checkboxes and files.
   if (isset($element['#process']) && !$element['#processed']) {
     foreach ($element['#process'] as $process) {
+      if (!function_exists($process)) continue;
       $element = $process($element, $form_state, $form_state['complete form']);
     }
     $element['#processed'] = TRUE;