v2.0.3: bugfix

lib/helpers.js

@@ -19,11 +19,11 @@ exports.prepareMetaData = meta=>{
     // through cycling properties and `common.clone` doesn't copies them
     return {message: meta.message, name: meta.name, stack: meta.stack};
   }
-  meta = common.clone(meta);
   if (typeof meta === 'object' && meta !== null) {
-    makeObjectNonCircular(meta);
+    meta = makeObjectNonCircular(meta);
     cleanFieldNames(meta);
   }
+  meta = common.clone(meta);
   return meta;
 };
 
@@ -58,18 +58,22 @@ function cleanFieldNames(object) {
 function makeObjectNonCircular(node, opt_parents) {
   opt_parents = opt_parents || [];
   opt_parents.push(node);
+  let copy = {};
   for (let key in node) {
     if (!Object.prototype.hasOwnProperty.call(node, key)) {
       continue;
     }
     let value = node[key];
     if (typeof value === 'object') {
       if (opt_parents.indexOf(value) === -1) {
-        makeObjectNonCircular(value, opt_parents);
+        copy[key] = makeObjectNonCircular(value, opt_parents);
       } else {
-        node[key] = '[Circular]';
+        copy[key] = '[Circular]';
       }
+    } else {
+      copy[key] = value;
     }
   }
   opt_parents.pop();
+  return copy;
 }

package.json

@@ -1,7 +1,7 @@
 {
   "name": "winston-mongodb",
   "license": "MIT",
-  "version": "2.0.2",
+  "version": "2.0.3",
   "description": "A MongoDB transport for winston",
   "author": "Charlie Robbins <[email protected]>",
   "contributors": [