[3.8.0] Regression compiling to ES5

[boris-petrov]

Not sure if this is the right title for this issue. Here is a reproduction.

Since updating to Ember 3.8.0, ember-ajax stops working in an ES5 build. isUnauthorizedError(new UnauthorizedError()) should return true (and does on ES6 builds on Ember 3.8 and any build on Ember 3.7-) but it returns false on ES5 on 3.8. isUnauthorizedError just does an instanceof check so the issue is somewhere deeper.

It's a regression from 3.7.3.

[Turbo87]

this is most likely caused by #17216, since ember-ajax errors seem to extend EmberError 😞

[boris-petrov]

This has been fixed in ember-ajax 5, thanks to @Turbo87!