https://git.ruby-lang.org/ruby.git/commit/?id=c57610dcd5

From c57610dcd5e1ffcea0414d515995d950036869b0 Mon Sep 17 00:00:00 2001
From: "S.H" <gamelinks007@g...>
Date: Tue, 1 Jun 2021 17:00:45 +0900
Subject: Add static modifier to C function in hash.c (#3138)

* add static modifier for rb_hash_reject_bang func

* add static modifier for rb_hash_reject func

* add static modifier for rb_hash_values_at func

* add static modifier for rb_hash_assoc func

* add static modifier for rb_hash_rassoc func
---
 hash.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/hash.c b/hash.c
index 9b98739..80cf54f 100644
--- a/hash.c
+++ b/hash.c
@@ -2547,7 +2547,7 @@ rb_hash_delete_if(VALUE hash) https://github.com/ruby/ruby/blob/trunk/hash.c#L2547
  *    e.each {|key, value| key.start_with?('b') } # => {:foo=>0}
  */
 
-VALUE
+static VALUE
 rb_hash_reject_bang(VALUE hash)
 {
     st_index_t n;
@@ -2579,7 +2579,7 @@ rb_hash_reject_bang(VALUE hash) https://github.com/ruby/ruby/blob/trunk/hash.c#L2579
  *    h1 # => {:foo=>0}
  */
 
-VALUE
+static VALUE
 rb_hash_reject(VALUE hash)
 {
     VALUE result;
@@ -2671,7 +2671,7 @@ rb_hash_except(int argc, VALUE *argv, VALUE hash) https://github.com/ruby/ruby/blob/trunk/hash.c#L2671
  *    h.values_at(:hello, :foo) # => [nil, 0]
  */
 
-VALUE
+static VALUE
 rb_hash_values_at(int argc, VALUE *argv, VALUE hash)
 {
     VALUE result = rb_ary_new2(argc);
@@ -4149,7 +4149,7 @@ assoc_i(VALUE key, VALUE val, VALUE arg) https://github.com/ruby/ruby/blob/trunk/hash.c#L4149
  *  Returns +nil+ if key +key+ is not found.
  */
 
-VALUE
+static VALUE
 rb_hash_assoc(VALUE hash, VALUE key)
 {
     st_table *table;
@@ -4210,7 +4210,7 @@ rassoc_i(VALUE key, VALUE val, VALUE arg) https://github.com/ruby/ruby/blob/trunk/hash.c#L4210
  *  Returns +nil+ if no such value found.
  */
 
-VALUE
+static VALUE
 rb_hash_rassoc(VALUE hash, VALUE obj)
 {
     VALUE args[2];
-- 
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