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ERROR in ./src/$$_gendir/app/app.module.ngfactory.ts: Cannot read property 'flags' of undefined

I'm working on a project based on the Angular Electron Repo, using the Angular 4 versions. When I try to run npm run electron:mac, which in turn runs webpack --display-error-details, the webpack build runs until it hits this error message:

npm run electron:mac

webpack --display-error-details

[XS25] ./src/polyfills.ts 2.45 kB 0 [built]
[0] multi ./src/main.ts 28 bytes 2 [built]
[dvQ4] ./src/environments/index.ts 252 bytes 2 [built]
[kke6] ./src/$$_gendir/app/app.module.ngfactory.ts 3.16 kB 2 [built] [failed] [1 error]
[x35b] ./src/main.ts 376 bytes 2 [built]
[1] multi ./src/polyfills.ts 28 bytes 0 [built]
[2] multi ./src/styles.scss 28 bytes 1 [built]
+ 147 hidden modules

ERROR in ./src/$$_gendir/app/app.module.ngfactory.ts
Module build failed: TypeError: Cannot read property 'flags' of undefined
at resolveAlias (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:24003:37)
at checkAliasSymbol (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:42692:26)
at checkImportBinding (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:42722:13)
at checkImportDeclaration (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:42740:29)
at checkSourceElement (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:43052:28)
at Object.forEach (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:1500:30)
at checkSourceFileWorker (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:43125:20)
at checkSourceFile (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:43105:13)
at getDiagnosticsWorker (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:43169:17)
at getDiagnostics (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:43155:24)
at Object.getEmitResolver (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:23078:13)
at /Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70539:69
at runWithCancellationToken (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70295:24)
at getDeclarationDiagnosticsForFileNoCache (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70538:20)
at getAndCacheDiagnostics (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70551:26)
at getDeclarationDiagnosticsWorker (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70535:20)
at getDeclarationDiagnosticsForFile (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70564:56)
at getDiagnosticsHelper (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70254:24)
at Object.getDeclarationDiagnostics (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/typescript/lib/typescript.js:70276:24)
at TypeScriptFileRefactor.getDiagnostics (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/@ngtools/webpack/src/refactor.js:52:60)
at Promise.resolve.then.then.then.then (/Users/Evan/Documents/Programming/electron/groupme-client/node_modules/@ngtools/webpack/src/loader.js:505:46)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
@ ./src/main.ts 3:0-74
@ multi ./src/main.ts


I'm not sure what the error message is referring to, no part of my application uses the property flags, including in app.module.ts or main.ts.

flags

app.module.ts

main.ts

I have seen many answers and threads which contain solutions for installing various versions of packages. Things such as upgrading @angular/cli to 1.7.3 and upgrading Typescript to 2.6.2 have only caused other issues. I believe that the issue is not with my installed modules, as the Angular Electron repo provides a working application with an identical set of modules in package.json.

@angular/cli

package.json

"scripts":
"ng": "ng",
"lint": "ng lint",
"start": "npm-run-all --parallel webpack:watch electron:serve",
"webpack:watch": "webpack --watch",
"start:web": "webpack-dev-server --content-base . --port 4200 --inline",
"build:electron:main": "tsc main.ts --outDir dist && copyfiles package.json dist && cd dist && npm install --prod && cd ..",
"build": "webpack --display-error-details && npm run build:electron:main",
"build:prod": "cross-env NODE_ENV=production npm run build",
"electron:serve": "npm run build:electron:main && electron ./dist --serve",
"electron:test": "electron ./dist",
"electron:dev": "npm run build && electron ./dist",
"electron:prod": "npm run build:prod && electron ./dist",
"electron:linux": "npm run build:prod && node package.js --asar --platform=linux --arch=x64",
"electron:windows": "npm run build:prod && node package.js --asar --platform=win32 --arch=ia32",
"electron:mac": "npm run build:prod && node package.js --asar --platform=darwin --arch=x64",
"test": "karma start ./karma.conf.js",
"pree2e": "webdriver-manager update --standalone false --gecko false --quiet && npm run build",
"e2e": "protractor ./protractor.conf.js"
,
"dependencies":
"@angular/common": "4.4.6",
"@angular/compiler": "4.4.6",
"@angular/core": "4.4.6",
"@angular/forms": "4.4.6",
"@angular/http": "4.4.6",
"@angular/platform-browser": "4.4.6",
"@angular/platform-browser-dynamic": "4.4.6",
"@angular/router": "4.4.6",
"core-js": "2.4.1",
"enhanced-resolve": "3.3.0",
"rxjs": "5.4.3",
"zone.js": "0.8.17"
,
"devDependencies":
"@angular/cli": "1.4.9",
"@angular/compiler-cli": "4.4.6",
"@types/core-js": "0.9.36",
"@types/jasmine": "2.5.54",
"@types/node": "7.0.7",
"autoprefixer": "7.1.4",
"codelyzer": "3.2.0",
"copyfiles": "1.2.0",
"cross-env": "5.0.5",
"css-loader": "0.28.7",
"cssnano": "3.10.0",
"electron": "1.7.8",
"electron-packager": "9.1.0",
"electron-reload": "1.2.1",
"exports-loader": "0.6.4",
"file-loader": "0.11.2",
"html-loader": "0.5.1",
"istanbul-instrumenter-loader": "3.0.0",
"jasmine-core": "2.8.0",
"jasmine-spec-reporter": "4.2.1",
"json-loader": "0.5.7",
"karma": "1.7.1",
"karma-chrome-launcher": "2.2.0",
"karma-cli": "1.0.1",
"karma-coverage-istanbul-reporter": "1.3.0",
"karma-jasmine": "1.1.0",
"karma-jasmine-html-reporter": "0.2.2",
"karma-sourcemap-loader": "0.3.7",
"less-loader": "4.0.5",
"minimist": "1.2.0",
"mkdirp": "0.5.1",
"npm-run-all": "^4.1.1",
"postcss-loader": "2.0.6",
"postcss-url": "7.1.2",
"protractor": "5.1.2",
"raw-loader": "0.5.1",
"sass-loader": "6.0.6",
"script-loader": "0.7.1",
"source-map-loader": "0.2.1",
"style-loader": "0.18.2",
"stylus-loader": "3.0.1",
"ts-node": "3.3.0",
"tslint": "5.7.0",
"typescript": "^2.5.3",
"url-loader": "0.5.9",
"webdriver-manager": "12.0.6",
"webpack": "3.6.0",
"webpack-dev-server": "2.8.2"
,


I'm very much out of answers here, any help is appreciated.

1 Answer
1

I started getting this error after i used

ng update


and I resolved the issue by reverting my package.json to the previous version of angular,

I downgraded from 6.1.3 to 6.0.7

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