nice print of unhandled exception stack trace

Author: samzilverberg

lib/winston/common.js

@@ -223,8 +223,26 @@ exports.log = function (options) {
         output += ' ' + options.prettyPrint(meta);
       } else if (options.prettyPrint) {
         output += ' ' + '\n' + util.inspect(meta, false, options.depth || null, options.colorize);
-      } else {
+      } else if (
+        Object.keys(meta).length === 5
+        && meta.hasOwnProperty('date')
+        && meta.hasOwnProperty('process')
+        && meta.hasOwnProperty('os')
+        && meta.hasOwnProperty('trace')
+        && meta.hasOwnProperty('stack')) {
+
+        //
+        // If meta carries unhandled exception data serialize the stack nicely
+        //
+        var stack = meta.stack;
+        delete meta.stack;
+        delete meta.trace;
         output += ' ' + exports.serialize(meta);
+        output += '\n' + stack.map(function(s){
+          return s + '\n';
+        });
+      } else {
+         output += ' ' + exports.serialize(meta);
       }
     }
   }