Uncaught TypeError: Class constructor ComputedProperty cannot be invoked without 'new'

[Krzyrok]

Hi. I've encountered a problem when I've updated ember-source to the newest stable version (3.7.2).

error:

Uncaught TypeError: Class constructor ComputedProperty cannot be invoked without 'new'
    at new TaskProperty
    at task

I've seen the issues:

• Error when used with native classes #261
• Does not work with native classes #271 (especially: Does not work with native classes #271 (comment))

But: I've upgraded ember-concurrency to newer version: 0.8.24 (mentioned in the issue) and 0.8.27 (the newest one) - none of them helped.
I don't use native classes, ember-native-class-polyfill nor ember-decorators.
I use on other hand typescript (2.9.2) and ember-typescript (1.5.0).

Usage in the code:

export default class SomeService extends Service.extend({
  _someTask: task(function* (this: SomeService) {
    const properties = yield this.api.callToApi();
  }).maxConcurrency(1).restartable(),
}) {};

Error is thrown on task construction, first line: _someTask: task(function* (this: SomeService) {

Environment details:

OS: Debian GNU/Linux 9.6
node version: 10.13.0
npm version: 6.4.1
yarn version: 1.13.0

ember-concurrency version: 0.8.24 and 0.8.27 (the newest one)
ember-source version: 3.8.0-beta.3, 3.7.2 (current stable version), 3.7.0., 3.6.1 (3.6.0 I couldn't test)
typescript: 2.8.3
ember-cli-typescript: 1.3.0

code which failed (showed in console):

  function TaskProperty(taskFn) {
    let tp = this;
    _utils._ComputedProperty.call(this, function (_propertyName) {
      taskFn.displayName = `${_propertyName} (task)`;
      return Task.create({
        fn: tp.taskFn,
        context: this,
        _origin: this,
        _taskGroupPath: tp._taskGroupPath,
        _scheduler: (0, _propertyModifiersMixin.resolveScheduler)(tp, this, _taskGroup.TaskGroup),
        _propertyName,
        _debug: tp._debug,
        _hasEnabledEvents: tp._hasEnabledEvents
      });
    });

    this.taskFn = taskFn;
    this.eventNames = null;
    this.cancelEventNames = null;
    this._observes = null;
  }

exact line: _utils._ComputedProperty.call(this, function (_propertyName) {

[Krzyrok]

Ah, I figured out that some another addon had a dependency on ember-concurrency. And it was installed some time ago - so it was resolved to older version (record in yarn.lock was pinned to specific, old version). Whole time ember was taking this old version (despite I had newer version in my package.json).

More details here: #207 (comment)

yarn list ember-concurrency (or npm ls ember-concurrency) helped to figure this out.

Final fix: removing the record in yarn.lock responsible for resolving package (ember-concurrency) as dependency. In my case there was: ember-data-copyable, ember-power-calendar, ember-power-select. All of those packages had specified the dependency with ^, so yarn install took newer version of ember-concurrency (for all of these addons): 0.8.27.

For other people: check if yarn list [package] (or npm ls [package]) shows that you have only the new package. If not - then modifying yarn/npm.lock can help. If not: upgrade of addon (new dependency specified). If this also didn't help: fork of addon and manual update of dependecy.

This addon looks that can be helpful to detect such situation: https://github.com/salsify/ember-cli-dependency-lint