TypeError: Attempting to configurable attribute of unconfigurable property

[robhicks]

This is for v1.0.0-rc.1 and also v1.0.0-alpha.4.

When running tests with PhantomJS 2.1.14, this error is thrown:

TypeError: Attempting to configurable attribute of unconfigurable property.
  at dist/components/idx-nwc/dist/webcomponents/custom-elements.min.js:18

Error first appeared in v1.0.0-alpha.4.

[cronon]

The error is thrown when the polyfill tries to patch nodes with Object.defineProperty. Phantomjs has dozen of related issues. ariya/phantomjs#13895
There was a dirty workaround to use __defineGetter__ method, nevertheless I tried and it didn't work

[Mirodil]

The same issue

[rootical]

Subscribing, blocks quite a lot of work on this end.

[treshugart]

I'm not sure this is fixable due to the PhantomJS unconfigurable issues and the fact that it's been deprecated in favour of Chrome headless.

[TimvdLippe]

Sadly this is an issue in PhantomJS and it is deprecated. Therefore I am closing this issue.