Updates in version 10.9.0 break Parcel compilation

[drewbolles]

Compiling split.io libraries (both vanilla JS and React) with Parcel throws an error:

TypeError: Incompatible receiver, Map required

I traced this issue to updates made in version in 10.9.0, 10.8.4 compiles fine.

I've created a repo to demonstrate the bug: https://github.com/drewbolles/parcel-split-debug

After cloning run npm i && npm serve and visit the development URL in a browser. You should see the error in the console.

I was unable to figure out the literal cause of the error, but it seems to be related to how Split uses core-js and how Parcel uses it.

[chillaq]

Thanks for the details, we are checking the issue now.

[smeijer]

@chillaq, were you able to find something? I'm having the same issue when using aria-query with parcel. I've created an issue at the parcel repo, but if that's not where the root cause lies, I should post it at the aria-query repo instead.

[chillaq]

Hi, which version of Parcel are you using, we are able to repro with parcel 1 version only.

[smeijer]

Yeah, it's indeed a parcel 1 issue only. Upgrading to 2 alpha helped.

[EmilianoSanchez]

@drewbolles , sorry for the delay in the notification.

You can upgrade now the JS SDK to version 10.14.0 in your example and it will work fine with Parcel 1, since we have removed core-js dependencies from the SDK (among other optimizations), in order to reduce its size.