From 98821d2725e268692cdb322ed75db974e851e9f7 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 20 Mar 2021 14:40:54 +0900
Subject: random.c: fixed seed underflow bug.

`MRB_INT_MIN` does not have a corresponding positive value.
---
 mrbgems/mruby-random/src/random.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'mrbgems')

diff --git a/mrbgems/mruby-random/src/random.c b/mrbgems/mruby-random/src/random.c
index 1fc42b854..67c6395d7 100644
--- a/mrbgems/mruby-random/src/random.c
+++ b/mrbgems/mruby-random/src/random.c
@@ -152,6 +152,9 @@ get_opt(mrb_state* mrb)
     arg = mrb_to_int(mrb, arg);
     i = mrb_integer(arg);
     if (i < 0) {
+      if (i == MRB_INT_MIN) {
+        mrb_raise(mrb, E_RANGE_ERROR, "integer underflow");
+      }
       arg = mrb_fixnum_value(0 - i);
     }
   }
-- 
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