https://git.ruby-lang.org/ruby.git/commit/?id=113bef6976

From 113bef697633803a33a547914b16ba5fbef165b8 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Fri, 4 Oct 2019 16:07:46 +0900
Subject: array.c (rb_mem_clear): remove "register" from arguments

to suppress the following warning:

```
compiling cxxanyargs.cpp
In file included from cxxanyargs.cpp:1:
In file included from ../../.././include/ruby/ruby.h:2150:
../../.././include/ruby/intern.h:56:19: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
void rb_mem_clear(register VALUE*, register long);
                  ^~~~~~~~~
../../.././include/ruby/intern.h:56:36: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
void rb_mem_clear(register VALUE*, register long);
                                   ^~~~~~~~~
```

diff --git a/array.c b/array.c
index c63bfb3..9235bf2 100644
--- a/array.c
+++ b/array.c
@@ -240,7 +240,7 @@ rb_ary_ptr_use_end(VALUE ary) https://github.com/ruby/ruby/blob/trunk/array.c#L240
 }
 
 void
-rb_mem_clear(register VALUE *mem, register long size)
+rb_mem_clear(VALUE *mem, long size)
 {
     while (size--) {
 	*mem++ = Qnil;
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 66c2ca6..d6b0a05 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -53,7 +53,7 @@ RUBY_SYMBOL_EXPORT_BEGIN https://github.com/ruby/ruby/blob/trunk/include/ruby/intern.h#L53
 #define UNLIMITED_ARGUMENTS (-1)
 
 /* array.c */
-void rb_mem_clear(register VALUE*, register long);
+void rb_mem_clear(VALUE*, long);
 VALUE rb_assoc_new(VALUE, VALUE);
 VALUE rb_check_array_type(VALUE);
 VALUE rb_ary_new(void);
-- 
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