From 3e55139c13a55c74b734681cac178ad195a36222 Mon Sep 17 00:00:00 2001
From: nicoo <nicoo@debian.org>
Date: Fri, 17 Jul 2020 12:54:37 +0200
Subject: [PATCH] factor::miller_rabbin::Result: Mark as #[must_use]

Ignoring a value of that type is a bug: they are only produced by
`miller_rabbin::test`, which is a pure, but expensive, function.

As such, an ignored value is always either a mistake, or an easy
optimisation opportunity (just remove the useless call to `test`).
---
 src/uu/factor/src/miller_rabin.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/uu/factor/src/miller_rabin.rs b/src/uu/factor/src/miller_rabin.rs
index ad454f1ac..3d12ead02 100644
--- a/src/uu/factor/src/miller_rabin.rs
+++ b/src/uu/factor/src/miller_rabin.rs
@@ -25,6 +25,7 @@ impl Basis for Montgomery<u32> {
 }
 
 #[derive(Eq, PartialEq)]
+#[must_use = "Ignoring the output of a primality test."]
 pub(crate) enum Result {
     Prime,
     Pseudoprime,