From 93653dfd4c6fbf5809487eefee7e0236cf79d762 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 25 Jul 2024 15:41:24 +0900
Subject: [PATCH] mruby-bigint (uzero_p): add fast path

---
 mrbgems/mruby-bigint/core/bigint.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mrbgems/mruby-bigint/core/bigint.c b/mrbgems/mruby-bigint/core/bigint.c
index 47ac58f4d..c4fae753a 100644
--- a/mrbgems/mruby-bigint/core/bigint.c
+++ b/mrbgems/mruby-bigint/core/bigint.c
@@ -248,6 +248,7 @@ ucmp(mpz_t *y, mpz_t *x)
 static int
 uzero_p(mpz_t *x)
 {
+  if (x->sz == 0) return 1;
   for (size_t i=0; i < x->sz; i++)
     if (x->p[i] != 0)
       return 0;