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

1 files changed, 13 insertions, 0 deletions

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|