From d903ee076a77191c676b1f5807c832d360c0eef0 Mon Sep 17 00:00:00 2001
From: endolith <endolith@gmail.com>
Date: Thu, 20 Jul 2023 18:39:08 -0400
Subject: [PATCH] Add error message for negative scores

---
 elsim/methods/star.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/elsim/methods/star.py b/elsim/methods/star.py
index 3e64d37..048f84b 100644
--- a/elsim/methods/star.py
+++ b/elsim/methods/star.py
@@ -224,7 +224,7 @@ def star(election, tiebreaker=None):
     election = np.asarray(election)
 
     if election.min() < 0:
-        raise ValueError
+        raise ValueError('Scores cannot be negative')
 
     if election.shape[1] == 1:
         # Only 1 candidate: that candidate wins.