It could be an idea to check the binfo return value of getrf!(B). If negative, it means an illegal input value. If positive, it means there are zeros that cause the matrix to be singular indicating islanding or some other problem with the network.

It could be nice to check for this and provide some additional feedback to the user.

I notice there is a #TODO in the code to check for islands, t

We need a compile test for the Vintage Story mods that works on that CI server and that doesn't run the game itself.

I don't think such a thing is documented simply, so this may be a Tyron question or a long read on C# and Mono build system testing.