From 90c1ebbfd578419e2c3e1251b7527483f8501bc2 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 9 Oct 2013 04:53:18 +0000
Subject: compar.c: fail if recursion

* compar.c (cmp_eq): fail if recursion.  [ruby-core:57736] [Bug #9003]
* thread.c (rb_exec_recursive_paired_outer): new function which is
  combinnation of paired and outer variants.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43208 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 compar.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'compar.c')

diff --git a/compar.c b/compar.c
index eea76cb637..2f4db291a4 100644
--- a/compar.c
+++ b/compar.c
@@ -51,10 +51,17 @@ rb_invcmp(VALUE x, VALUE y)
     }
 }
 
+static VALUE
+cmp_eq_recursive(VALUE arg1, VALUE arg2, int recursive)
+{
+    if (recursive) return Qfalse;
+    return rb_funcallv(arg1, cmp, 1, &arg2);
+}
+
 static VALUE
 cmp_eq(VALUE *a)
 {
-    VALUE c = rb_funcall(a[0], cmp, 1, a[1]);
+    VALUE c = rb_exec_recursive_paired_outer(cmp_eq_recursive, a[0], a[1], a[1]);
 
     if (NIL_P(c)) return Qfalse;
     if (rb_cmpint(c, a[0], a[1]) == 0) return Qtrue;
-- 
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