From f7e009d29ea3da3d9741902222cc280fcfca594a Mon Sep 17 00:00:00 2001
From: Matt Sturgeon <matt@sturgeon.me.uk>
Date: Sun, 2 Jun 2024 03:17:21 +0100
Subject: [PATCH] lib/options: add `mkEnum'` argument assertions

---
 lib/options.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/options.nix b/lib/options.nix
index aa9f8387..491e3fef 100644
--- a/lib/options.nix
+++ b/lib/options.nix
@@ -213,6 +213,9 @@ rec {
           default ? head values,
           ...
         }@args:
+        # `values` is a list and `default` is one of the values (or null)
+        assert isList values;
+        assert default == null || elem default values;
         mkNullableWithRaw' (
           (filterAttrs (n: v: n != "values") args)
           // {