"install uglify-js" throw ERR!

[YataoZhang]

$sudo npm install uglify-js --save

npm ERR! Darwin 15.2.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install"
npm ERR! node v5.0.0
npm ERR! npm v3.5.2

npm ERR! Cannot read property 'target' of null
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! https://github.com/npm/npm/issues

npm ERR! Please include the following file with any support request:
npm ERR! /usr/local/lib/node_modules/fis-prepackager-concat/npm-debug.log

[doug-wade]

@YataoZhang please include /usr/local/lib/node_modules/fis-prepackager-concat/npm-debug.log

[npm-robot]

We're closing this issue as it has gone seven days without activity and without being labeled. If we haven't even labeled in issue in seven days then we're unlikely to ever read it.

If you are still experiencing the issue that led to you opening this or this is a feature request you're still interested in then we encourage you to open a new issue. If this was a support issue, you may be better served by joining package.communty and asking your question there.

For more information about our new issue aging policies and why we've instituted them please see our blog post.