V 2.1.0: TypeError: Cannot read property 'kind' of undefined

when running

ng build --prod

with this set of packages

{
  "name": "create",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "startWithProxy": "ng serve --host 0.0.0.0 --disableHostCheck true --proxy-config proxy.config.json",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^8.2.14",
    "@angular/cdk": "^8.2.3",
    "@angular/common": "~8.2.14",
    "@angular/compiler": "~8.2.14",
    "@angular/core": "~8.2.14",
    "@angular/flex-layout": "^8.0.0-beta.27",
    "@angular/forms": "~8.2.14",
    "@angular/material": "^8.2.3",
    "@angular/material-moment-adapter": "^8.2.3",
    "@angular/platform-browser": "~8.2.14",
    "@angular/platform-browser-dynamic": "~8.2.14",
    "@angular/router": "~8.2.14",
    "@ng-bootstrap/ng-bootstrap": "^5.1.4",
    "ajv": "^6.10.2",
    "angularx-qrcode": "^2.1.0",
    "core-js": "^3.6.1",
    "hammerjs": "^2.0.8",
    "moment": "^2.24.0",
    "ngx-color-picker": "^8.2.0",
    "rxjs": "^6.5.4",
    "tslib": "^1.9.0",
    "zone.js": "~0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.800.6",
    "@angular/cli": "~8.0.6",
    "@angular/compiler-cli": "~8.2.14",
    "@angular/language-service": "~8.0.3",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "^2.0.8",
    "@types/node": "~8.9.4",
    "codelyzer": "^5.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^2.0.6",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.4.5"
  }
}

This error happens

ERROR in ./node_modules/angularx-qrcode/fesm5/angularx-qrcode.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 isAngularDecoratorMetadataExpression (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:265:35)
    at checkNodeForDecorators (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:77:21)
    at visitNodes (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16514:30)
    at Object.forEachChild (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16740:24)
    at checkNodeForDecorators (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16635:21)
    at checkNodeForDecorators (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16692:24)
    at checkNodeForDecorators (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16703:24)
    at checkNodeForDecorators (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/Users/egylis/eclipse-workspace/Formation/NGFormation/create/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16599:21)

[Cordobo]

Ok, what I’ve read so far, it could be an issue with an older @angular dependency (1) used in your package.json. I run ng build --prod with the following devDependencies and can’t reproduce the error. Coiuld you try updating your dependencies to the ones below?

"devDependencies": {
    "@angular-devkit/build-angular": "~0.803.21",
    "@angular-devkit/build-ng-packagr": "~0.803.21",
    "@angular/cli": "~8.3.21",
    "@angular/compiler-cli": "~8.2.14",
    "@angular/language-service": "~8.2.14",
...
}

1. Reference: https://github.com/angular/angular-cli/pull/15705

[lance-h]

@nicosoutn2014 I am using @angular/cli ^7.2.2 - I downgraded angularx-qrcode to ^1.6.4 which removed the issue for me. Be aware that the documentation is slightly different between versions.