:~$ npm install -g grunt
npm http GET https://registry.npmjs.org/grunt
../src/node_crypto_bio.cc:213: size_t node::NodeBIO::Read(char*, size_t): Assertion `read_head_ != write_head_' failed.
Aborted (core dumped)

I tried to install grunt but got this error. I have node and npm installed already. Please someone help me resolve this problem!