mocha installation error: Unexpected end of input - node.js

Question

I'm trying to install mocha on my windows 10 but I'm getting this error on the terminal
$npm install mocha#3.0.0 --save-dev
npm ERR! Unexpected end of input at 1:19983
npm ERR! a":"./bin/_mocha"},"directories":{},"dist":{"shasum":"653712e9852cce4
npm ERR!
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\NS\AppData\Roaming\npm-cache\_logs\2017-06-24T21_47_36_363Z-debug.log
this is the log file content
0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli 'C:\\Users\\NS\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'install',
1 verbose cli 'mocha#3.0.0',
1 verbose cli '--save-dev' ]
2 info using npm#5.0.2
3 info using node#v6.10.2
4 silly install loadCurrentTree
5 silly install readLocalPackageData
6 http fetch GET 200 https://registry.npmjs.org/mocha 34ms (from cache)
7 silly fetchPackageMetaData error for mocha#3.0.0 Unexpected end of input at 1:19983
7 silly fetchPackageMetaData a":"./bin/_mocha"},"directories":{},"dist":{"shasum":"653712e9852cce4
7 silly fetchPackageMetaData ^
8 verbose stack SyntaxError: Unexpected end of input at 1:19983
8 verbose stack a":"./bin/_mocha"},"directories":{},"dist":{"shasum":"653712e9852cce4
8 verbose stack ^
8 verbose stack at SyntaxError (native)
8 verbose stack at Object.parseJSON (C:\Users\NS\AppData\Roaming\npm\node_modules\npm\node_modules\pacote\node_modules\make-fetch-happen\node_modules\node-fetch-npm\node_modules\json-parse-helpfulerror\node_modules\jju\lib\parse.js:745:13)
8 verbose stack at parse (C:\Users\NS\AppData\Roaming\npm\node_modules\npm\node_modules\pacote\node_modules\make-fetch-happen\node_modules\node-fetch-npm\node_modules\json-parse-helpfulerror\index.js:10:13)
8 verbose stack at consumeBody.call.then.buffer (C:\Users\NS\AppData\Roaming\npm\node_modules\npm\node_modules\pacote\node_modules\make-fetch-happen\node_modules\node-fetch-npm\src\body.js:96:50)
8 verbose stack at process._tickCallback (internal/process/next_tick.js:109:7)
9 verbose cwd C:\Users\NS\node-test
10 verbose Windows_NT 10.0.15063
11 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\NS\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "mocha#3.0.0" "--save-dev"
12 verbose node v6.10.2
13 verbose npm v5.0.2
14 error Unexpected end of input at 1:19983
14 error a":"./bin/_mocha"},"directories":{},"dist":{"shasum":"653712e9852cce4
14 error ^
15 verbose exit [ 1, true ]

Answer 1

if you are using the latest version of node
try downgrading to the LTS version
//
sudo npm install n -g
sudo n lts

Answer 2

if you are using it in local then use command "npm cache clean --force" to clear cache. Then run your command it will work