Magento released official PHP 7.2 patches for Magento 1 (September 2018), which means this extension is not needed anymore!!
But as far as I can see, the fix for the topological order for the totals calculation (see 1c1c5e452eb77b71e578d2f66d2aa4ca59628fcb) is not included in the official patch and has been reverted in master branch in commit 6b2fa1c5891a96e574f162361fa1ac637c13f34d.
What is the reason for that. Because in a shop, I am supporting, the old order fix does not fix the sorting with the third party extension Customweb/Subscriptions.
In the README.md of this repository it says
But as far as I can see, the fix for the topological order for the totals calculation (see 1c1c5e452eb77b71e578d2f66d2aa4ca59628fcb) is not included in the official patch and has been reverted in master branch in commit 6b2fa1c5891a96e574f162361fa1ac637c13f34d.
What is the reason for that. Because in a shop, I am supporting, the old order fix does not fix the sorting with the third party extension Customweb/Subscriptions.