Error: ENOENT, No such file or directory '/child.js'
at Object.openSync (fs:150:18)
at Object.readFileSync (fs:94:15)
at Object.<anonymous> (/opt/local/lib/node/webworker/webworker-child.js:138:12)
at Module._compile (node.js:472:25)
at Module._loadScriptSync (node.js:482:10)
at Module.loadSync (node.js:352:12)
at Object.runMain (node.js:535:24)
at node.js:760:10
Witness: