Quoted property aren't correctly transpiled

[tpluscode]

I have a TS property in quotes (not sure it's needed but works)

export class MyExample {
   readonly 'escaped': String = null;
}

Interestingly, the default value is not added to the Polymer output. Even more surprising is that readOnly is.

Also, when I add @notify annotation, twc throws:

\twc\src\parsers\JSParser.js:225
                    config.annotations = usedAnnotations;
                                       ^

TypeError: Cannot set property 'annotations' of undefined
    at \twc\src\parsers\JSParser.js:225:40
    at String.replace (native)
    at Module.JSParser [as constructor] (\twc\src\parsers\JSParser.js:41:294)
    at new Module (E:\Piskorz\AppData\Roaming\npm\node_modules\twc\src\PolymerModule.js:95:28)
    at DestroyableTransform._transform (\twc\src\index.js:56:36)
    at DestroyableTransform.Transform._read (\twc\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:159:10)
    at DestroyableTransform.Transform._write (\twc\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:147:83)
    at doWrite (\twc\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:347:64)
    at writeOrBuffer (\twc\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:336:5)
    at DestroyableTransform.Writable.write (\twc\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:274:11)