Problem with rxjs 6.x in umd bundles

[uparlange]

Bug, feature request, or proposal:

BUG - Problem with rxjs 6.x in umd bundles.

What is the expected behavior?

Application should load without errors.

What is the current behavior?

Application can't load... many errors in console.

Uncaught TypeError: Cannot read property 'operators' of undefined
at MutationObserverFactory.create (cdk-observers.umd.js:11)
at cdk-observers.umd.js:12

Same problem in

• cdk-a11y.umd.js
• cdk-layout.umd.js
• cdk-scrolling.umd.js
• cdk-overlay.umd.js
• cdk-text-field.umd.js
• cdk-table.umd.js
• cdk-tree.umd.js
• material.umd.js

What are the steps to reproduce?

https://unpkg.com/@angular/cdk@6.0.1/bundles/cdk-observers.umd.js

(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/cdk/coercion'), require('@angular/core'), require('rxjs'), require('rxjs/operators')) :
typeof define === 'function' && define.amd ? define('@angular/cdk/observers', ['exports', '@angular/cdk/coercion', '@angular/core', 'rxjs', 'rxjs/operators'], factory) :
(factory((global.ng = global.ng || {}, global.ng.cdk = global.ng.cdk || {}, global.ng.cdk.observers = {}),global.ng.cdk.coercion,global.ng.core,global.Rx,global.Rx.operators));
}(this, (function (exports,coercion,core,rxjs,operators) { 'use strict';

should be

(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/cdk/coercion'), require('@angular/core'), require('rxjs'), require('rxjs/operators')) :
typeof define === 'function' && define.amd ? define('@angular/cdk/observers', ['exports', '@angular/cdk/coercion', '@angular/core', 'rxjs', 'rxjs/operators'], factory) :
(factory((global.ng = global.ng || {}, global.ng.cdk = global.ng.cdk || {}, global.ng.cdk.observers = {}),global.ng.cdk.coercion,global.ng.core,global.rxjs,global.rxjs.operators));
}(this, (function (exports,coercion,core,rxjs,operators) { 'use strict';

What is the use-case or motivation for changing an existing behavior?

Application should load without errors.

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular & Material 6+
All OS
All browsers
Application developped in ecmascript

Is there anything else we should know?

Everything should be clear !

[uparlange]

Meanwhile to correct the problem add this script after rxjs and before material dependencies.

<script>window.Rx = window.rxjs;</script>

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