bug(web): TypeError: Cannot redefine property: name

[sentry-io]

Sentry Issue: KEYMAN-WEB-DX

TypeError: Cannot redefine property: name
  at None (blob:null/4baa49ce-2d04-4277-8a76-d240ad93546e:1:69)

It's clearly coming from the predictive-text worker, but... it's not clear at all which part of the worker. Sentry's information here is pretty sparse.

[jahorton]

This surfaces as a general keyboard-related error within the Android app whenever it starts up.

[jahorton]

Note: #9409 passed its user tests just a few nightlies ago, and it would surface with the same issue. So... something must have changed somehow since then?

The first thing to come to mind: we did just merge the kmc-kmw feature branch (🗜) a few days ago with #8954. According to the bot, that'd have been 17.0.156... the currently-known minimum version for this new underlying error detected by Sentry. Not that I see an easy explanation along that route; there aren't many KMW-related files in that changeset, and none have an obvious correlation. The most significant KMW-related changes are to automated test setup... which is a far cry from what ends up in the Android app.

[jahorton]

Using downloads.keyman.com and emulated Android 5.0, I can reproduce the error back to 17.0.154. (Before that, #9409's error is in place.) So it's nothing to do with kmc-kmw, at least.

[jahorton]

Will be fixed by #9943.