In redirect.admin.inc, the redirect_element_validate_redirect function contains code that seemingly does nothing.
It sets $value twice, to two different items, without using the variable in between the two definitions.
It checks to see if $value is not equal to '<front>', but earlier it passes the value through drupal_get_normal_path(), which modifies '<front>' to an empty string.
This was discovered when I was trying to exempt <front> from validation in my patch for #2327247: Validate internal URLs so redirects cannot lead to 404 pages → .
Closed: won't fix
1.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
Since the module is working, and this report does not indicate otherwise, I am marking this as closed - won't fix. Please reopen if there is an issue with the operations of the module.
Patches are also welcome.