option object shouldn't be updated internally.

lib/instance.js

@@ -482,7 +482,7 @@ Instance.prototype.save = function(options) {
   if (arguments.length > 1) {
     throw new Error('The second argument was removed in favor of the options object.');
   }
-  options = _.defaults(options || {}, {
+  options = _.defaults({}, options || {}, {
     hooks: true,
     validate: true
   });
@@ -724,7 +724,7 @@ Instance.prototype.save = function(options) {
 * @return {Promise<this>}
 */
 Instance.prototype.reload = function(options) {
-  options = _.defaults(options || {}, {
+  options = _.defaults({}, options || {}, {
     where: this.where(),
     limit: 1,
     include: this.options.include || null
@@ -828,7 +828,7 @@ Instance.prototype.destroy = function(options) {
       for(var i = 0; i < primaryKeys.length; i++) {
           where[this.Model.rawAttributes[primaryKeys[i]].field] = this.get(primaryKeys[i], { raw: true });
       }
-      return this.sequelize.getQueryInterface().delete(this, this.Model.getTableName(options), where, _.defaults(options, { type: QueryTypes.DELETE,limit: null}));
+      return this.sequelize.getQueryInterface().delete(this, this.Model.getTableName(options), where, _.defaults({}, options, { type: QueryTypes.DELETE,limit: null}));
     }
   }).tap(function() {
     // Run after hook
@@ -913,7 +913,7 @@ Instance.prototype.increment = function(fields, options) {
     }
   }
 
-  options = _.defaults(options || {}, {
+  options = _.defaults({}, options || {}, {
     by: 1,
     attributes: {},
     where: {}
@@ -970,7 +970,7 @@ Instance.prototype.increment = function(fields, options) {
  * @return {Promise}
  */
 Instance.prototype.decrement = function(fields, options) {
-  options = _.defaults(options || {}, {
+  options = _.defaults({}, options || {}, {
     by: 1
   });