The [email protected] published module is broken

[kanongil]

The published dist/legacy/ember.*.js uses const, which carries over to the ember-cli built vendor.js and causes it to break on eg. iOS 9.3.5 devices.

It seems that this is a babel issue in the ember-source publication process. A number of lines containing const data = _taggedTemplateLiteralLoose(…); is left in the files.
It seems that babel fails to properly apply const => var for tagged template literals.

I have not checked older versions than 3.12.1. For 3.13+ it works again due to a revised build process.

[kanongil]

I checked the published packages, and this issue seems to have been introduced with [email protected]. The [email protected] package does not contain const expressions.

[kanongil]

Seems that this was introduced with #17859.

[rwjblue]

Fixed by #18576 and being released as v3.12.2 (currently pending CI for publishing).