It’s Halloween and I have just been caught out by a spooky borrow checker error that caught me by surprise. It feels as though it is the single most time consuming issue to fix and always seems to catch me unaware. The issue in particular is “cannot borrow x immutably as it is already borrowed mutably” - it manifests itself in different ways under different circumstances, but I find myself hitting it often when refactoring. It happened again recently so I did some investigating and thought I would discuss it in more detail.

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diig is a music discovery app and the beginnings of a music platform that I started working on a few years ago. In that time I have been using the app myself, and so have a few friends, but I haven’t really announced much about it so I thought I would get some words down about the project. The name diig comes from the term crate digger which is given to record collectors who dig though vast quantities of records to find hidden gems.

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An ongoing source of frustration is maintaining continuous integration in open source hobby projects. It’s really useful to have continuous builds, automated tests and package delivery, but it comes with maintenance. Time will pass and the time will come where I want to tag a build in git and let all my lovely automated CI publish a package, or maybe work on a project I haven’t touched for a while and I want to run the tests, but for what feels like more often than not, the build fails for an unexpected reason.

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Often a small fix
Requires thorough debugging
Its trace left unseen

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I stopped going on Twitter a while ago because it has the tendency to evoke rage, as it is designed to do. But every now and then I check back in - it can be useful sometimes for keeping up with graphics research, gamedev news and some people do post nice things, like sharing projects they are working on, so there is something to pull me back from time to time.

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Work has been continuing smoothly on my Rust graphics engine project hotline over the last month or so. I was slowly winding down from my current day job and have a little time off before starting a new role, so that has given me more time to dedicate to this project. I have been focusing on implementing different graphics demos and rendering techniques, which has thrown up a few missing pieces in the gfx backend and I am keen to get the API as complete as possible, because I am unsure of how much time I will have to work on it when I start my new role or even the validity of working on code in the public domain.

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