1 files changed, 13 insertions, 0 deletions
diff --git a/test/cgi/test_cgi_core.rb b/test/cgi/test_cgi_core.rb
index 9e6e61819a..9d626c7ff1 100755
--- a/test/cgi/test_cgi_core.rb
+++ b/test/cgi/test_cgi_core.rb
@@ -21,6 +21,19 @@ class CGICoreTest < Test::Unit::TestCase
     $stdout = STDOUT
   end
 
+  def test_cgi_parse_illegal_query
+    @environ = {
+      'REQUEST_METHOD'  => 'GET',
+      'QUERY_STRING'    => 'a=111&&b=222&c&d=',
+      'HTTP_COOKIE'     => '_session_id=12345; name1=val1&val2;',
+      'SERVER_SOFTWARE' => 'Apache 2.2.0',
+      'SERVER_PROTOCOL' => 'HTTP/1.1',
+    }
+    ENV.update(@environ)
+    cgi = CGI.new
+    assert_equal(["a","b","d"],cgi.keys.sort) if RUBY_VERSION>="1.9"
+    assert_equal("",cgi["d"])
+  end
 
   def test_cgi_core_params_GET
     @environ = {