From ca437aeb395e77125fcd2ab9bc83bbcd3e357610 Mon Sep 17 00:00:00 2001
From: Jean Boussier <byroot@ruby-lang.org>
Date: Tue, 14 Mar 2023 10:12:32 +0100
Subject: rb_ary_sum: don't enter fast path if initial isn't a native numeric
 type.

[Bug #19530]

If the initial value isn't one of the special cased types, we directly
jump to the slow path.
---
 array.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'array.c')

diff --git a/array.c b/array.c
index 6a2f94c8b2..83d1c9ced6 100644
--- a/array.c
+++ b/array.c
@@ -8181,6 +8181,12 @@ rb_ary_sum(int argc, VALUE *argv, VALUE ary)
 
     n = 0;
     r = Qundef;
+
+    if (!FIXNUM_P(v) && !RB_BIGNUM_TYPE_P(v) && !RB_TYPE_P(v, T_RATIONAL)) {
+        i = 0;
+        goto init_is_a_value;
+    }
+
     for (i = 0; i < RARRAY_LEN(ary); i++) {
         e = RARRAY_AREF(ary, i);
         if (block_given)
@@ -8265,6 +8271,7 @@ rb_ary_sum(int argc, VALUE *argv, VALUE ary)
     }
 
     goto has_some_value;
+    init_is_a_value:
     for (; i < RARRAY_LEN(ary); i++) {
         e = RARRAY_AREF(ary, i);
         if (block_given)
-- 
cgit v1.2.3