Failing kotlin2js codegen for delegated extension properties

gistfile1.txt

// Kotlin example

class Delegate() {
    fun get(obj: String, desc: PropertyMetadataImpl) : String  = obj.toString() + ".log"
}

val String.log by Delegate()
  
fun main(args : Array<String>) {
  println("Hello, world!".log)
}

// Here is generated JS

Kotlin.System.flush();
(function () {
  'use strict';
  var _ = Kotlin.defineRootPackage(function () {
    this.log$delegate = new _.Delegate();
  }, /** @lends _ */ {
    Delegate: Kotlin.createClass(null, null, /** @lends _.Delegate.prototype */ {
      get: function (obj, desc) {
        return obj + '.log';
      }
    }),
    get_log: {value: function () {
      
      // BUG: $receiver omited and ignored
      
      return this.log$delegate.get(this, new Kotlin.PropertyMetadata('log'));
    }},
    main: function (args) {
      Kotlin.println(_.get_log('Hello, world!'));
    }
  });
  Kotlin.defineModule('JS_TESTS', _);