npm run build Error

[LBX13]

vue-hackernews@1.0.0 build C:\Users\v_liubingxue\Downloads\vue-hackernews-gh-pages

cross-env NODE_ENV=production webpack --progress --hide-modules

Hash: 60e1b7e993d9b77d1124ts
Version: webpack 1.15.0
Time: 18201ms
Asset Size Chunks Chunk Names
build.js 104 kB 0 [emitted] main

ERROR in ./src/components/App.vue
Module build failed: TypeError: Object function Object() { [native code] } has no method 'assign'
at Object.module.exports (C:\Users\v_liubingxue\Downloads\vue-hackernews-gh-pages\node_modules\vue-loader\lib\loader.js:32:24)
@ ./src/main.js 13:11-42

ERROR in ./src/components/NewsView.vue
Module build failed: TypeError: Object function Object() { [native code] } has no method 'assign'
at Object.module.exports (C:\Users\v_liubingxue\Downloads\vue-hackernews-gh-pages\node_modules\vue-loader\lib\loader.js:32:24)
@ ./src/main.js 17:16-52

ERROR in ./src/components/ItemView.vue
Module build failed: TypeError: Object function Object() { [native code] } has no method 'assign'
at Object.module.exports (C:\Users\v_liubingxue\Downloads\vue-hackernews-gh-pages\node_modules\vue-loader\lib\loader.js:32:24)
@ ./src/main.js 21:16-52

ERROR in ./src/components/UserView.vue
Module build failed: TypeError: Object function Object() { [native code] } has no method 'assign'
at Object.module.exports (C:\Users\v_liubingxue\Downloads\vue-hackernews-gh-pages\node_modules\vue-loader\lib\loader.js:32:24)
@ ./src/main.js 25:16-52

[Evan You]

Your Node version is too old.