nuxeo-path-suggestion validation error on paper-typeahead

Add a {{<nuxeo-path-suggestion>}} element to a doctype edit layout. Click “Save” and get the following error:

nuxeo-app.html-145.js:373 Uncaught TypeError: this.inputElement.validate is not a functionat HTMLElement.validate (nuxeo-app.html-145.js:373)at HTMLElement.validate (nuxeo-app.html-55.js:71)at HTMLElement.validate (elements.html-72.js:39)at HTMLElement._validate (elements.html-73.js:27)at HTMLElement.save (elements.html-73.js:56)at HTMLElement.handler (nuxeo-app.html-12.js:79)at Object._fire (nuxeo-app.html-17.js:674)at Object.forward (nuxeo-app.html-17.js:1069)at Object.click (nuxeo-app.html-17.js:1032)at HTMLElement._handleNative (nuxeo-app.html-17.js:452)

where this.inputElement.validate appears to defined in Polymer.PaperInputBehavior which is referenced by the <paper-typeahead> element in <nuxeo-path-suggestion>. The this.inputElement is <input id="input" autocorrect$="on" autocomplete="off" placeholder="" autocapitalize="none"> which apparently has no validate() method.

A possible workaround could be to create a local validate function on the <nuxeo-path-suggestion> element.