From 04b031656add2a8c9f7f2136e4fc7fc16c9ac901 Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 27 Oct 2016 07:48:53 +0000
Subject: merge revision(s) 56252,56254: [Backport #12743]

	* eval_intern.h (TH_PUSH_TAG): Initialize struct rb_vm_tag::tag with
	  Qundef rather than 0 which is equal to Qfalse. Since Kernel#throw(obj)
	  searches a tag with rb_vm_tag::tag == obj, throw(false) can
	  accidentally find an unrelated tag which is not created by
	  Kernel#catch.  [ruby-core:77229] [Bug #12743]

	* test/ruby/test_exception.rb (test_throw_false): Add a test case for
	  this.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@56505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_exception.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index 5ca54ecbe1..c49de80113 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -180,6 +180,16 @@ class TestException < Test::Unit::TestCase
     }
   end
 
+  def test_throw_false
+    bug12743 = '[ruby-core:77229] [Bug #12743]'
+    e = assert_raise_with_message(UncaughtThrowError, /false/, bug12743) {
+      Thread.start {
+        throw false
+      }.join
+    }
+    assert_same(false, e.tag, bug12743)
+  end
+
   def test_else_no_exception
     begin
       assert(true)
-- 
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