Ticket #6907: template_error_silencing_configuration.patch

django/template/__init__.py

@@ -697 +697 @@
                                 # raised in the function itself.
                                 current = settings.TEMPLATE_STRING_IF_INVALID # invalid method call
                             except Exception, e:
-                                if getattr(e, 'silent_variable_failure', False):
-                                    current = settings.TEMPLATE_STRING_IF_INVALID
+                                if getattr(settings, "SHOW_TEMPLATE_ERRORS", False):
+                                    raise e
                                 else:
-                                    raise
+                                    if getattr(e, 'silent_variable_failure', False):
+                                        current = settings.TEMPLATE_STRING_IF_INVALID
+                                    else:
+                                        raise
                 except (TypeError, AttributeError):
                     try: # list-index lookup
                         current = current[int(bit)]

docs/settings.txt

@@ -958 +958 @@
 
 .. _site framework docs: ../sites/
 
+SHOW_TEMPLATE_ERRORS
+-------
+
+Default: ``False``
+
+This setting is a flag which tells the django template to don't silence errors.
+It is useful when developing form widgets, avoiding debug issues, like 
+``SyntaxError``, for example.
+
 TEMPLATE_CONTEXT_PROCESSORS
 ---------------------------