From c31f6285c71ec0ad8052205d7029986453c465ce Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 7 Mar 2018 12:04:43 +0000
Subject: complex.c: check type

* complex.c (m_cos, m_sin): determine the type by the internal
  type, not by a method.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62689 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 complex.c                 |  4 ++--
 test/ruby/test_complex.rb | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/complex.c b/complex.c
index 6b54d44ba2..43f2964545 100644
--- a/complex.c
+++ b/complex.c
@@ -486,7 +486,7 @@ imp1(sinh)
 static VALUE
 m_cos(VALUE x)
 {
-    if (f_real_p(x))
+    if (!RB_TYPE_P(x, T_COMPLEX))
 	return m_cos_bang(x);
     {
 	get_dat1(x);
@@ -501,7 +501,7 @@ m_cos(VALUE x)
 static VALUE
 m_sin(VALUE x)
 {
-    if (f_real_p(x))
+    if (!RB_TYPE_P(x, T_COMPLEX))
 	return m_sin_bang(x);
     {
 	get_dat1(x);
diff --git a/test/ruby/test_complex.rb b/test/ruby/test_complex.rb
index 48fb9947a3..c2ed1b0827 100644
--- a/test/ruby/test_complex.rb
+++ b/test/ruby/test_complex.rb
@@ -970,4 +970,18 @@ class Complex_Test < Test::Unit::TestCase
     assert_equal(obj, c.real)
     assert_equal(-1, c.imag)
   end
+
+  def test_canonicalize_polar
+    obj = Class.new(Numeric) do
+      def initialize
+        @x = 2
+      end
+      def real?
+        (@x -= 1) > 0
+      end
+    end.new
+    assert_raise(TypeError) do
+      Complex.polar(1, obj)
+    end
+  end
 end
-- 
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