update child.on('error')

Author: Amoki

lib/helpers/hydrater.js

@@ -75,8 +75,8 @@ module.exports = function(hydraterFunction, childs, opbeatConfig) {
         };
         cleaner.called = false;
 
-        child.process.on('error', function(exitCode) {
-          cleaner(new HydrationError("Wild error appeared while spawning child. Exit code:" + exitCode));
+        child.process.on('error', function(error) {
+          cleaner(new HydrationError("Wild error appeared while spawning child. error:" + error));
         });
 
         child.process.stderr.on('readable', function() {