From f1863163a82dfb772fb67b419f64264ebd05ecb8 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Wed, 16 Oct 2024 15:06:53 +0900
Subject: [PATCH] mruby-bigint (uzero_p): avoid signed and unsigned comparison
 in loop

---
 mrbgems/mruby-bigint/core/bigint.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mrbgems/mruby-bigint/core/bigint.c b/mrbgems/mruby-bigint/core/bigint.c
index 422969295..94e168b66 100644
--- a/mrbgems/mruby-bigint/core/bigint.c
+++ b/mrbgems/mruby-bigint/core/bigint.c
@@ -248,9 +248,11 @@ static int
 uzero_p(mpz_t *x)
 {
   if (x->sz == 0) return 1;
-  for (size_t i=x->sz-1; 0 <= i; i--)
+  for (size_t i=x->sz-1;; i--) {
     if (x->p[i] != 0)
       return 0;
+    if (i == 0) break;
+  }
   return 1;
 }