TypeError: Cannot read property 'kind' of undefined on building an app with the library

First of all, great library. I was using it for a while but recently running ng build --prod started yielding the following error:

ERROR in ./node_modules/angular-feather/fesm5/angular-feather.js
Module build failed (from ./node_modules/@angular-devkit/build-optimizer/src/build-optimizer/webpack-loader.js):
TypeError: Cannot read property 'kind' of undefined

At first I thought that the problem was with webpack or some Angular dependencies. Unfortunately, it seems like the only solution that currently works for me is removing angular-feather library in order to make the build process work again.

Any ideas why it can be happening and what could be the solutions?

[mmaltsev]

@michaelbazos I resolved the problem by fixing the version of the library at 6.0.4. It seems like one of your updates in the following versions introduced breaking changes. My suspicion is that it was the one with Angular 8 dependencies. It would be great if you could patch the current version of the portal and create a new minor / major version with breaking changes. Thanks!

[mmaltsev]

@avmaisak @michaelbazos Thank you guys! I tried to remove package_lock and reinstall node_modules but the error persists. Before creating this issue I upgraded the version of the library up to ^6.0.8, unfortunately, it didn’t help either.

I will try to recreate this error in a clean project and update the issue if succeed.