From 3a90e31307e7a811eada3d597a7ea45a5472a378 Mon Sep 17 00:00:00 2001
From: nicoo <nicoo@debian.org>
Date: Fri, 19 Jun 2020 13:39:42 +0200
Subject: [PATCH] factor::numeric::inv_mod_u64: Provide a more-helpful error
 message

---
 src/uu/factor/src/numeric.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/uu/factor/src/numeric.rs b/src/uu/factor/src/numeric.rs
index e95fd1948..29babb281 100644
--- a/src/uu/factor/src/numeric.rs
+++ b/src/uu/factor/src/numeric.rs
@@ -175,7 +175,7 @@ impl Arithmetic for Montgomery {
 // extended Euclid algorithm
 // precondition: a is odd
 pub(crate) fn inv_mod_u64(a: u64) -> u64 {
-    assert!(a % 2 == 1);
+    assert!(a % 2 == 1, "{} is not odd", a);
     let mut t = 0u64;
     let mut newt = 1u64;
     let mut r = 0u64;