Ticket #24760: 24760_2.patch

wp-includes/ms-settings.php

@@ -135 +135 @@
                 ms_not_installed( $domain, $path );
         }
 
-        // @todo Investigate when exactly this can occur.
+        // This occurs when following the activation link sent via email in subdomain installs
         if ( empty( $current_blog ) && wp_installing() ) {
                 $current_blog = new stdClass;
                 $current_blog->blog_id = $blog_id = 1;
+                $current_blog->domain = $domain;
+                $current_blog->path = '/';
+                $current_blog->public = 1;
         }
 
         // No site has been found, bail.