From 2414f36adfae87c548d8b05e474c5ccda6df5fd6 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Thu, 4 Jul 2024 18:48:36 -0700
Subject: hash: fix: equal hashes being reduced modulo NUM_MAX.

Almost exactly 6 years ago, commit 612f4f57e made hashes
use the full width of the ucnum type. However, several
reductions of the form hash &= NUM_MAX were forgotten.

* hash.c (hash_hash_op): Eliminate reductions modulo NUM_MAX.

* struct.c (struct_inst_hash): Likewise.
---
 struct.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'struct.c')

diff --git a/struct.c b/struct.c
index b421a265..a449e9d7 100644
--- a/struct.c
+++ b/struct.c
@@ -1870,7 +1870,6 @@ static ucnum struct_inst_hash(val obj, int *count, ucnum seed)
   for (sl = 0; sl < nslots; sl++) {
     ucnum hash = equal_hash(si->slot[sl], count, seed);
     out += hash;
-    out &= NUM_MAX;
   }
 
   return out;
-- 
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