Undefined variable: category_name after 2.8.1 upgrade?

Question

I've run into a problem after updating from 2.7.3 to 2.8.1. I've got a couple pages that have this error (below).

I've also noticed, every time I have an "{exp:channel:entries} {/exp:channel:entries}" tag, the error is present. So if I repeated the tags 3 times, I'de have the error repeat 3 times.

Has anyone ran into this problem after upgrading?

Severity: Notice  
Message: Undefined variable: category_name
Filename: helpers/segment_helper.php
Line Number: 98

Answer 1

Found the fix. https://support.ellislab.com/bugs/detail/20152

Edit system/expressionengine/helpers/segment_helper.php around line 97 to add this conditional above ee()->load->model(‘category_model’); so it looks like:

if (empty($category_name))
            {
                return '';
            }

            ee()->load->model('category_model');