node.js - Why does `npm install` hang with this specific `package.json`? -

when trying npm install exact package.json, npm hangs , becomes totally unreponsive.

{   "name": "my project",   "description": "my project",   "version": "1.0.0",   "private": true,   "main": "server.js",   "dependencies": {     "body-parser": "^1.15.2",     "compression": "^1.6.2",     "cors": "^2.8.0",     "loopback": "^2.31.0",     "loopback-boot": "^2.21.0",     "loopback-component-explorer": "^2.5.0",     "loopback-connector-mysql": "^2.3.0",     "loopback-connector-redis": "^0.0.3",     "loopback-datasource-juggler": "^2.50.0",     "loopback-ds-timestamp-mixin": "^3.4.0",     "mosca": "^2.1.0",     "mqtt": "^1.14.1",     "q": "^1.4.1",     "redis": "^2.6.2",     "serve-favicon": "^2.3.0",     "socket.io": "^1.4.8",     "socketio-auth": "0.0.5" }, "devdependencies": {   "grunt": "^1.0.1",   "grunt-contrib-concat": "^1.0.1",   "grunt-contrib-jshint": "^1.0.0",   "grunt-contrib-uglify": "^2.0.0",   "grunt-docular": "^0.2.4",   "grunt-loopback-sdk-angular": "^1.2.0",   "jshint": "^2.9.3" },   "scripts": {     "start": "node .",     "pretest": "jshint ."   } } 

i tested on different clients, both using npm version 3.10.6 , node v6.5.0. i'm pretty sure worked days ago, now, refuses complete. tried npm cache clean, tried lowering maxsockets down 1, waiting 20-30 minutes , tried remove packages packages.json, finding culprit it's hit , miss. example, "mosca" alone makes npm hang, when removed package.json, still won't finish.

the last message see it's:

[             .....] - extract:socketio-auth: sill doparallel extract 852 

and nothing. doesn't give error, when setting logging level silly. hangs forever. don't understand , i'm pretty sure working day ago. can me? package.json work you?

i checked this,this , this, think it's not related them.

i't known npm bug, still open... :-(
i'd rollback npm 6.4 (which #13782 bug free), till it's fixed...