[ivy] ERROR in Expected array when reading property exports using concat()

🐞 bug report

Affected Package

The issue is caused by package @angular/cli ?

Is this a regression?

NO

Description

When using .concat() to concat two arrays in the exports field of a Module, ivy throws an ERROR in Expected array when reading property exports

The compiled version of the package @swimlane/ngx-charts contains such an concat() that seems to prevent ivy to recognize the export variable as array. Removing concat() and merge the arrays by hand resolves the error. Since concat() returns an Array itself, I see the issue in angular / ivy, not in the ngx-charts package.

The line of the source: https://github.com/swimlane/ngx-charts/blob/4d9f58b1b8ec3127b408964c373613ee961dee71/src/common/chart-common.module.ts#L61

🔬 Minimal Reproduction

Checkout: https://github.com/maltehol/ivy-ngx-charts and run ng build

🔥 Exception or Error

ERROR in Expected array when reading property exports

🌍 Your Environment

Angular Version:

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/
    

Angular CLI: 8.0.0-beta.11
Node: 11.13.0
OS: win32 x64
Angular: 8.0.0-beta.11
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.800.0-beta.11
@angular-devkit/build-angular     0.800.0-beta.11
@angular-devkit/build-optimizer   0.800.0-beta.11
@angular-devkit/build-webpack     0.800.0-beta.11
@angular-devkit/core              8.0.0-beta.11
@angular-devkit/schematics        8.0.0-beta.11
@angular/@types                   <error>
@angular/events                   <error>
@angular/rxjs                     <error>
@angular/tslib                    <error>
@angular/typescript               <error>
@ngtools/webpack                  8.0.0-beta.11
@schematics/angular               8.0.0-beta.11
@schematics/update                0.800.0-beta.11
rxjs                              6.4.0
typescript                        3.3.4000
webpack                           4.29.6

[blackholegalaxy]

@JoostK we can confirm using spread syntax in module declaration triggers the error ERROR in Expected array when reading property declarations each time.

exports: [
    ...gmdModules,
    ScrollDispatchModule,
  ],

It’s quite useful to be able to use spread syntax when importing/exporting/declaring large number of modules/components.

[yantrab]

I have the same with 8.0.0-rc.1