https://git.ruby-lang.org/ruby.git/commit/?id=4b6df7f735

From 4b6df7f735c10f326f09a44fe38dc10b05ced21c Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@r...>
Date: Thu, 11 Feb 2021 13:34:05 +0900
Subject: merge revision(s) a55eb9a2af7950d180d9d31ffde2bce66710f44f: [Backport
 #17572]

	Make reciprocal properly of non-integral rational [Bug #17572]

	---
	 rational.c                 | 2 +-
	 test/ruby/test_rational.rb | 7 +++++++
	 2 files changed, 8 insertions(+), 1 deletion(-)
---
 rational.c                 | 2 +-
 test/ruby/test_rational.rb | 7 +++++++
 version.h                  | 2 +-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/rational.c b/rational.c
index c606f3c..dc01425 100644
--- a/rational.c
+++ b/rational.c
@@ -1875,7 +1875,7 @@ VALUE https://github.com/ruby/ruby/blob/trunk/rational.c#L1875
 rb_rational_reciprocal(VALUE x)
 {
     get_dat1(x);
-    return f_rational_new_no_reduce2(CLASS_OF(x), dat->den, dat->num);
+    return nurat_convert(CLASS_OF(x), dat->den, dat->num, FALSE);
 }
 
 /*
diff --git a/test/ruby/test_rational.rb b/test/ruby/test_rational.rb
index 301890b..5676b41 100644
--- a/test/ruby/test_rational.rb
+++ b/test/ruby/test_rational.rb
@@ -598,6 +598,13 @@ class Rational_Test < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_rational.rb#L598
     assert_nothing_raised(TypeError, '[Bug #5020] [ruby-dev:44088]') do
       Rational(1,2).coerce(Complex(1,1))
     end
+
+    assert_raise(ZeroDivisionError) do
+      1 / 0r.coerce(0+0i)[0]
+    end
+    assert_raise(ZeroDivisionError) do
+      1 / 0r.coerce(0.0+0i)[0]
+    end
   end
 
   class ObjectX
diff --git a/version.h b/version.h
index afd5761..0f507c0 100644
--- a/version.h
+++ b/version.h
@@ -2,7 +2,7 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L2
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 3
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 152
+#define RUBY_PATCHLEVEL 153
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 2
-- 
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