Using a keyword in attribute name causes error in IE11

[warpech]

When I use a preserved HTML attribute name as one of the Polymer Element attributes, e.g.

<polymer-element name="my-elem" noscript attributes="language">
<polymer-element name="my-elem" noscript attributes="lang">
<polymer-element name="my-elem" noscript attributes="title">

Internet Explorer 11 shows exception:

TypeError: Unable to get property 'title' of undefined or null reference TypeError: Unable to get property 'title' of undefined or null reference
   at Function code (Function code:1:1)
   at publishAttributes (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:18104)
   at desugarBeforeChaining (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:19080)
   at buildPrototype (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:18924)
   at register (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:18749)
   at _register (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:23549)
   at go (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:21656)
   at registerWhenReady (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:23342)
   at d (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:12684)
   at b (http://rawgithub.com/Polymer/polymer/master/polymer.js:32:12635)

I am not sure if this is a bug (perhaps using a reserved HTML attribute name is not a good practice), but somehow this does not raise an error in Chrome nor Firefox.

JsFiddle to reproduce the issue: http://jsfiddle.net/warpech/TJhWP/1/

[sjmiles]

Duplicates #379

[warpech]

Sorry, I thought I searched for possible duplicate.

[sjmiles]

No worries, we need to get this fixed. Another ticket for it increases the priority.

[sorvell]

Closed in favor of #379