But isn’t a language that deletes code crazy?
No, wanting to keep code that demonstrably has bugs according to its own specifications is crazy. What good could it possibly serve? It is corrupted and must be cleansed from your codebase.
Vigil will do this for you automatically.
Vigil deleted a function. Won’t that cause the functions that call it to fail?
It would seem that those functions appear to be corrupted as well. Run Vigil again and it will take care of that for you. Several invocations may be required to fully excise all bugs from your code.