CI Failures: Function.prototype.apply was called on undefined

[rwjblue]

As of 2019-08-06 our CI has been failing this test:

ember-cli/tests/acceptance/smoke-test-slow.js

Line 241 in 9756145

it('ember build generates instrumentation files when viz is enabled', async function() {

With this error:

TypeError: Function.prototype.apply was called on undefined, which is a undefined and not a function
    at $o (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/esm/esm.js:1:224377)
    at xu (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/esm/esm.js:1:226413)
    at wu (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/esm/esm.js:1:227391)
    at Eu (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/esm/esm.js:1:227999)
    at Module.<anonymous> (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/esm/esm.js:1:295976)
    at n (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/esm/esm.js:1:279589)
    at getFeatures (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/@ember-data/-build-infra/src/features.js:5:33)
    at Object.<anonymous> (/home/travis/build/ember-cli/ember-cli/tmp/node-FGpJBujF.tmp/node_modules/@ember-data/-build-infra/src/features.js:31:18)

The issue appears to be an incompatibility with esm and heimdall-fs-monitor, I've reported the issue in heimdalljs/heimdall-fs-monitor#22 (and will work on fixing over there) but cross posting here for visibility.

[locks]

Linked PR has been merged.