diff --git a/logging/console.js b/logging/console.js
index a0e49c1..03f0809 100644
--- a/logging/console.js
+++ b/logging/console.js
@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-var Logger = (function () {
+var logger = (function () {
   let color = {
     red: "\033[1;31m",
     green: "\033[1;32m",
@@ -61,6 +61,16 @@ var Logger = (function () {
     dumpln(color.green + sep + color.clear);
   }
 
+  function traceback() {
+    error("===[ Traceback ]");
+    try {
+      throw new Error();
+    } catch (e) {
+      dump(e.stack || e.stacktrace || "");
+    }
+    error("===");
+  }
+
   return {
     console: console,
     dump: dump,
@@ -69,6 +79,7 @@ var Logger = (function () {
     dumpln: dumpln,
     comment: comment,
     testcase: testcase,
-    separator: separator
+    separator: separator,
+    traceback: traceback
   };
 })();
diff --git a/random/random.js b/random/random.js
index dede6aa..9bda73d 100644
--- a/random/random.js
+++ b/random/random.js
@@ -38,7 +38,7 @@ var random = {
   range: function (start, limit) {
     // Returns an integer in [start, limit]. Uniform distribution.
     if (isNaN(start) || isNaN(limit)) {
-      Utils.traceback();
+      logger.traceback();
       throw new TypeError("random.range() received a non number type: '" + start + "', '" + limit + "')");
     }
     return this.number(limit - start + 1) + start;
@@ -49,7 +49,7 @@ var random = {
   },
   item: function (list) {
     if (!(list instanceof Array || (list !== undefined && typeof list != "string" && list.hasOwnProperty("length")))) {
-      //Utils.traceback();
+      logger.traceback();
       throw new TypeError("this.item() received a non array type: '" + list + "'");
     }
     return list[this.number(list.length)];
@@ -78,14 +78,14 @@ var random = {
       limit = 2;
     }
     if (isNaN(limit)) {
-      Utils.traceback();
+      logger.traceback();
       throw new TypeError("random.chance() received a non number type: '" + limit + "'");
     }
     return this.number(limit) == 1;
   },
   choose: function (list, flat) {
     if (!(list instanceof Array)) {
-      Utils.traceback();
+      logger.traceback();
       throw new TypeError("random.choose() received a non-array type: '" + list + "'");
     }
     let total = 0;
@@ -137,7 +137,7 @@ var random = {
   },
   subset: function (list, limit) {
     if (!(list instanceof Array)) {
-      Utils.traceback();
+      logger.traceback();
       throw new TypeError("random.some() received a non-array type: '" + list + "'");
     }
     if (typeof limit !== 'number') {
diff --git a/utils/common.js b/utils/common.js
index ac297cc..d93ec6e 100644
--- a/utils/common.js
+++ b/utils/common.js
@@ -63,14 +63,5 @@ utils.common = {
       }
     }
     return obj1;
-  },
-  traceback: function () {
-    Logger.error("===[ Traceback ]");
-    try {
-      throw new Error();
-    } catch (e) {
-      Logger.dump(e.stack || e.stacktrace || "");
-    }
-    Logger.error("===");
   }
 };