From a85ed626f18d1014d09fb37eb0a703976c3d2b53 Mon Sep 17 00:00:00 2001
From: Marc-Andre Lafortune <github@marc-andre.ca>
Date: Thu, 18 Mar 2021 23:29:49 -0400
Subject: Fix Enumerable#inject with high negative fixnums [Bug #17731]

---
 enum.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'enum.c')

diff --git a/enum.c b/enum.c
index d8eefc8cbf..e0fcab049c 100644
--- a/enum.c
+++ b/enum.c
@@ -805,7 +805,7 @@ ary_inject_op(VALUE ary, VALUE init, VALUE op)
                 if (FIXNUM_P(e)) {
                     n += FIX2LONG(e); /* should not overflow long type */
                     if (!FIXABLE(n)) {
-                        v = rb_big_plus(ULONG2NUM(n), v);
+                        v = rb_big_plus(LONG2NUM(n), v);
                         n = 0;
                     }
                 }
-- 
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