Error Found – Line 507 in class-googlesitemapgeneratorstandardbuilder.php

In the build_taxonomies() function within class-googlesitemapgeneratorstandardbuilder.php on line 507 the $offset can be the string: “category” because it is assigned to it by $taxonomy. But because “category” doesnt have a “-” and a numerical value to be parsed (for line 503) $offset remains a string and so line 507 fails since u can’t decrement a non-numeric string.

So, the line: $offset = ( --$offset ) * $links_per_page;
becomes: $offset = (--"category") * $links_per_page;

This triggers the PHP error:
PHP Warning: non-numeric expression.