https://git.ruby-lang.org/ruby.git/commit/?id=78785fb990

From 78785fb99041521fc5da01ffa6ab3f4f3936ce06 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 24 May 2022 17:23:23 +0900
Subject: [ruby/date] Constify gperf-generated table

https://github.com/ruby/date/commit/6d7ab08ffc
---
 ext/date/zonetab.h | 2 +-
 tool/gperf.sed     | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/ext/date/zonetab.h b/ext/date/zonetab.h
index d82b011dc1..39a435db16 100644
--- a/ext/date/zonetab.h
+++ b/ext/date/zonetab.h
@@ -49,7 +49,7 @@ struct zone; https://github.com/ruby/ruby/blob/trunk/ext/date/zonetab.h#L49
 
 #ifndef GPERF_DOWNCASE
 #define GPERF_DOWNCASE 1
-static unsigned char gperf_downcase[256] =
+static const unsigned char gperf_downcase[256] =
   {
       0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,  13,  14,
      15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
diff --git a/tool/gperf.sed b/tool/gperf.sed
index 6b3e1980be..52915f80d5 100644
--- a/tool/gperf.sed
+++ b/tool/gperf.sed
@@ -20,3 +20,4 @@ s/(int)([a-z_]*)&((struct \([a-zA-Z_0-9][a-zA-Z_0-9]*\)_t *\*)0)->\1_str\([1-9][ https://github.com/ruby/ruby/blob/trunk/tool/gperf.sed#L20
   s/ hval = / hval = (unsigned int)/
   s/ return / return (unsigned int)/
 }
+s/^\(static\) \(unsigned char gperf_downcase\)/\1 const \2/
-- 
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