https://git.ruby-lang.org/ruby.git/commit/?id=9c2213f669

From 9c2213f6695a16917dbe7b5a3a334116d6d8bbf6 Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@r...>
Date: Sun, 13 Mar 2022 11:49:15 +0900
Subject: merge revision(s) 6a6227e0168b059c3ed34c9f0ace2e5dc2364221: [Backport
 #18517]

	Shifting zero always results in zero [Bug #18517]

	---
	 numeric.c | 2 ++
	 1 file changed, 2 insertions(+)
---
 numeric.c | 2 ++
 version.h | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/numeric.c b/numeric.c
index e4bb4817bb..691ab77042 100644
--- a/numeric.c
+++ b/numeric.c
@@ -4529,6 +4529,7 @@ rb_fix_lshift(VALUE x, VALUE y) https://github.com/ruby/ruby/blob/trunk/numeric.c#L4529
     long val, width;
 
     val = NUM2LONG(x);
+    if (!val) return (rb_to_int(y), INT2FIX(0));
     if (!FIXNUM_P(y))
 	return rb_big_lshift(rb_int2big(val), y);
     width = FIX2LONG(y);
@@ -4575,6 +4576,7 @@ rb_fix_rshift(VALUE x, VALUE y) https://github.com/ruby/ruby/blob/trunk/numeric.c#L4576
     long i, val;
 
     val = FIX2LONG(x);
+    if (!val) return (rb_to_int(y), INT2FIX(0));
     if (!FIXNUM_P(y))
 	return rb_big_rshift(rb_int2big(val), y);
     i = FIX2LONG(y);
diff --git a/version.h b/version.h
index 5de5de5fc7..9ada821db3 100644
--- a/version.h
+++ b/version.h
@@ -12,7 +12,7 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L12
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 4
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 191
+#define RUBY_PATCHLEVEL 192
 
 #define RUBY_RELEASE_YEAR 2022
 #define RUBY_RELEASE_MONTH 3
-- 
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