From 6d14c47c20455828b7945a15920a18c4eee13d42 Mon Sep 17 00:00:00 2001
From: kazu <kazu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 24 Nov 2017 11:00:10 +0000
Subject: Fix TOCTTOU and avoid to read existing unreadable file

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60900 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/irb/test_workspace.rb | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'test/irb')

diff --git a/test/irb/test_workspace.rb b/test/irb/test_workspace.rb
index ce4c86d20b..970dc7fd14 100644
--- a/test/irb/test_workspace.rb
+++ b/test/irb/test_workspace.rb
@@ -32,6 +32,19 @@ module TestIRB
       end
     end
 
+    def test_code_around_binding_with_existing_unreadable_file
+      Tempfile.create do |f|
+        code = "IRB::WorkSpace.new(binding)\n"
+        f.print(code)
+        f.close
+
+        File.chmod(0, f.path)
+
+        workspace = eval(code, binding, f.path)
+        assert_equal(nil, workspace.code_around_binding)
+      end
+    end
+
     def test_code_around_binding_with_script_lines__
       with_script_lines do |script_lines|
         Tempfile.create do |f|
-- 
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