Reproduce https://github.com/microsoft/TypeScript/issues/8912

README.md

Minimal example to reproduce microsoft/TypeScript#34869

git clone https://gist.github.com/b3e58e7eac7750faa235ef66bdb559ab.git
cd b3e58e7eac7750faa235ef66bdb559ab
npm install
npm run build

The last command runs tsc and will output

TypeError: Cannot read property 'valueDeclaration' of undefined

and a stack trace. No output will be generated.

foo.js

export default class Foo {

  constructor() {
    console.log(this.getType());
  }

  /**
   * @abstract
   * @returns {import("./type").default}
   */
  getType() {}

}

index.js

import PointFoo from './pointfoo';

new PointFoo();

package.json

{
  "name": "valuedeclaration-of-undefined",
  "version": "1.0.0",
  "description": "Reproduces https://github.com/microsoft/TypeScript/issues/34869",
  "main": "index.js",
  "scripts": {
    "build": "tsc",
    "start": "node -r esm index.js"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "esm": "^3.2.25",
    "typescript": "^3.8.0-dev.20191126"
  }
}

pointfoo.js

import Foo from './foo';
import Type from './type';

export default class PointFoo extends Foo {

  /**
   * @inheritDoc
   */
  getType() {
    return Type.POINT;
  }

}

tsconfig.json

{
  "compilerOptions": {
    "outDir": "./build",
    "emitDeclarationOnly": true,
    "declaration": true,
    "allowJs": true,
    "checkJs": true
  },
  "include": [
    "./*.js"
  ]
}

type.js

/**
 * @enum {string}
 */
export default {
  'POINT': 'point',
  'LINE': 'line'
};