Incompatible with Ember 3.9

I’m seeing some test failures in one of my addons running against ember-beta

https://travis-ci.com/alexlafroscia/ember-rx/jobs/179065658

Ultimately, this error is stemming from ember-concurrency and (presumably) task not being compatible with the changes that were made to the Computed Property system in Ember 3.9 to gain compatibility with decorators.

While not obvious in CI, the error that I’m seeing is actually this:

TypeError: Found non-callable @@iterator

Which stems from calling the constructor of ComputedProperty with a function here

https://github.com/machty/ember-concurrency/blob/master/addon/-task-property.js#L419-L431

The constructor now expects an array as the first argument

https://github.com/emberjs/ember.js/blob/89b122ac65824b48d7c08da7f2d8b3998041c372/packages/%40ember/-internals/metal/lib/computed.ts#L168

The error I’m seeing is specifically triggered because of the way that first argument is “spread” here

https://github.com/emberjs/ember.js/blob/89b122ac65824b48d7c08da7f2d8b3998041c372/packages/%40ember/-internals/metal/lib/computed.ts#L207

[maxfierke]

@basz You should ensure you don’t have a dependency that is resolving to a lower version of ember-concurrency (e.g. ember-power-select, etc.). If there’s not a more recent version of the addon that permits ember-concurrency 1.0.0, you can use Yarn resolutions to force it to resolve to ember-concurrency 1.0.0 (if you’re using Yarn).

[machty]

Should be fixed in 0.9.0