console: make global console work in workers

PR-URL: #109
Reviewed-By: Stephen Belanger <[email protected]>
Reviewed-By: Timothy Gu <[email protected]>
Reviewed-By: Alexey Orlenko <[email protected]>
Reviewed-By: Olivia Hugger <[email protected]>
Reviewed-By: James Butler <[email protected]>

Author: addaleax

lib/console.js

@@ -245,7 +245,12 @@ Console.prototype.groupEnd = function groupEnd() {
     this[kGroupIndent].slice(0, this[kGroupIndent].length - 2);
 };
 
-module.exports = new Console(process.stdout, process.stderr);
+if (isMainThread) {
+  module.exports = new Console(process.stdout, process.stderr);
+} else {
+  const { SyncWriteStream } = require('internal/fs');
+  module.exports = new Console(new SyncWriteStream(1), new SyncWriteStream(2));
+}
 module.exports.Console = Console;
 
 function noop() {}