Issue with `performCount` on Ember v3.15

We tried to update our app to Ember 3.15 this morning and the test suite of one of our apps uncovered the following issue:

Assertion Failed: You attempted to update performCount on <(unknown):ember22520>, but it had already been used previously in the same computation. Attempting to update a value after using it in a computation can cause logical errors, infinite revalidation bugs, and performance issues, and is not supported.

performCount was first used:

• While rendering: (instance of a (unknown function) modifier)

Stack trace for the first usage: at get (http://localhost:7357/assets/vendor.js:39430:11) at Class.incrementProperty (http://localhost:7357/assets/vendor.js:53987:72) at Class.schedule (http://localhost:7357/assets/vendor.js:158913:12) at Class._performShared (http://localhost:7357/assets/vendor.js:160316:23) at Class.perform (http://localhost:7357/assets/vendor.js:160286:19) at XValidatedInput._focus (http://localhost:7357/assets/vendor.js:143177:33) at XValidatedInput.focusIn (http://localhost:7357/assets/vendor.js:143157:12) at XValidatedInput.trigger (http://localhost:7357/assets/vendor.js:59364:23)

I haven’t been able to come up with a reproduction yet, but I’ll update this issue if I can provide one.

[allthesignals]

@maxfierke that was totally it! time to add https://github.com/salsify/ember-cli-dependency-lint to this project…

appreciate it 😃

[Turbo87]

that double negation is hard to parse 😅