Angular 7 : "ng serve --aot" fails the after a file change

Question

"ng serve --aot" which succeeds first time, fails after a file change every time with the following error

ERROR in Debug Failure. False expression: Host should not return a redirect source file from `getSourceFile`
i ｢wdm｣: Failed to compile.

Re-running the command works again.

With respect to contents posted in "https://github.com/angular/angular-cli/issues/11835", I have tried down grading "@angular/compiler-cli": to version '6.1.1'. It did not help.

contents of my package.json are as follows,

{
  "name": "matrix-dashboards",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^7.1.4",
    "@angular/cdk": "^7.2.0",
    "@angular/common": "~7.1.0",
    "@angular/compiler": "^7.1.4",
    "@angular/core": "~7.1.0",
    "@angular/forms": "~7.1.0",
    "@angular/material": "^7.2.0",
    "@angular/platform-browser": "~7.1.0",
    "@angular/platform-browser-dynamic": "~7.1.0",
    "@angular/router": "~7.1.0",
    "core-js": "^2.5.4",
    "crypto-js": "^3.1.9-1",
    "font-awesome": "^4.7.0",
    "materialize-css": "^1.0.0",
    "roboto-fontface": "^0.10.0",
    "rxjs": "~6.3.3",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.11.0",
    "@angular/cli": "~7.1.2",
    "@angular/compiler-cli": "~7.1.0",
    "@angular/language-service": "~7.1.0",
    "@types/node": "~8.9.4",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.1.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "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": "~3.1.6"
  }
}

Appreciate any help, to help me find a way to get "ng serve --aot" to compile the code properly every time a file is changed. Thanks

Answer 1

Hope this helps other people with such error.

What I found as a solution what an issue in the official Angular CLI repository. In my case the issue was caused by duplicated typing files used for typescript - check here.

After finding the module that was causing the issue through troubleshooting, I was able to fix it. All thanks to the contributors of the issue.