From d2d105b589594ef458421d3c4cf403ad9a024970 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 25 Jul 2022 14:45:41 +0900
Subject: [PATCH] bigint.c (mpz_get_int): should work with zero (i.e. `y->p ==
 NULL`).

---
 mrbgems/mruby-bigint/core/bigint.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mrbgems/mruby-bigint/core/bigint.c b/mrbgems/mruby-bigint/core/bigint.c
index 6da7b73b4..33167610f 100644
--- a/mrbgems/mruby-bigint/core/bigint.c
+++ b/mrbgems/mruby-bigint/core/bigint.c
@@ -721,6 +721,11 @@ mpz_get_str(mrb_state *mrb, char *s, mrb_int sz, mrb_int base, mpz_t *x)
 static int
 mpz_get_int(mpz_t *y, mrb_int *v)
 {
+  if (uzero(y)) {
+    *v = 0;
+    return TRUE;
+  }
+
   mp_limb2 i = 0;
   mp_limb *d = y->p + y->sz;