6.4.8 Update Caused a 500 Server Error

Just an FYI – updating to the latest version of the plugin caused a 500 server error on my site, running on a pressable site server with the latest WP version. I had to rollback to the previous release 6.4.7 to get the site running again.

Here are the details from the debug log:
[19-Feb-2017 19:39:01 UTC] PHP Fatal error: Uncaught Error: Call to a member function is_main_query() on null in /wp-content/plugins/theme-my-login/includes/class-theme-my-login.php:264
Stack trace:
#0 /wordpress/core/4.7.2/wp-includes/class-wp-hook.php(298): Theme_My_Login->pre_get_posts(Object(WP_Query))
#1 /wordpress/core/4.7.2/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(”, Array)
#2 /wordpress/core/4.7.2/wp-includes/plugin.php(515): WP_Hook->do_action(Array)
#3 /wordpress/core/4.7.2/wp-includes/class-wp-query.php(1681): do_action_ref_array(‘pre_get_posts’, Array)
#4 /wordpress/core/4.7.2/wp-includes/class-wp-query.php(3238): WP_Query->get_posts()
#5 /wordpress/core/4.7.2/wp-includes/class-wp.php(617): WP_Query->query(Array)
#6 /wordpress/core/4.7.2/wp-includes/class-wp.php(735): WP->query_posts()
#7 /wordpress/core/4.7.2/wp-includes/functions.php(955): WP->main(”)
#8 /wordpress/core/4.7.2/wp-blog-header.php(16): wp()
#9 /wordpress/core/4.7.2/index.php(17): require(‘/wordpress/core…’)
#10 {main}
thrown in /wp-content/plugins/theme-my-login/includes/class-theme-my-login.php on line 264