cant build due to "Optional chaining cannot appear in left-hand side"

Type of Issue

[ x] Bug Report

Description

After running ng build my-publishable-module I get an error durring build

✔ Compiling with Angular sources in Ivy partial compilation mode. ✖ Generating FESM2020 Optional chaining cannot appear in left-hand side (Note that you need plugins to import files that are not JavaScript) Error: Optional chaining cannot appear in left-hand side (Note that you need plugins to import files that are not JavaScript) at error (/Users/omar/Sites/met-libs-nx/node_modules/ng-packagr/node_modules/rollup/dist/shared/rollup.js:159:30)

It looks like @rollup@2.68.0 (/ng-packagr/node_modules/rollup/) throws this error.

There is a lot of chatter about this bug on rollup. but i have not found a solution. https://github.com/rollup/rollup/pull/3582

I tried all the suggestions with rollup and updating it within my project but no luck.

Version Information

Angular CLI: 13.1.3
Node: 14.16.0
Package Manager: npm 6.14.11
OS: darwin x64

Angular: 13.1.2
... animations, common, compiler, compiler-cli, core, forms
... language-service, material, platform-browser
... platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1301.3
@angular-devkit/build-angular   13.1.3
@angular-devkit/core            13.2.5
@angular-devkit/schematics      13.2.5
@angular/cli                    13.1.3
@angular/fire                   7.2.1
@schematics/angular             13.2.5
ng-packagr                      13.1.3
rxjs                            6.6.7
typescript                      4.5.4

Please include all version numbers that might be relevant, e.g. third-party libraries

[alan-agius4]

I believe the problem is caused by the below and since you are using casting you are also bypassing Typescript error reporting.

(this.schema?.fields as Field[])[e.previousContainer.data.index] = e.container.data.item;
(this.schema?.fields as Field[])[e.container.data.index] = e.previousContainer.data.item;

[alan-agius4]

Printing the fileInfo on error https://github.com/rollup/rollup/blob/51cab92373bcf8c844a8de2a6765869f7eb05a5d/src/Module.ts#L836 should give should be enough to determine which file is causing the problem.