DeprecationWarning causing 500 Internal Server Error in wzrd

[deathcap]

All output on stderr causes a 500 Internal Server Error:

  proc.stderr.pipe(concat(function error(err) {
    console.log(err);
    if (!err.length) return
    endLog()
    process.stderr.write(err.toString())
    res.statusCode = 500

This includes the DeprecationWarning: 'GLOBAL' is deprecated, use 'global' warning added in Node.js v6: nodejs/node#1838, triggered by cwise-parser

Works with beefy (no server error)

[deathcap]

Not sure of the best fix. Pattern match stderr output for what looks like "warnings"?

Or could wzrd pass through stderr and determine browserify failure by some other means? (process exit code?)