diff --git a/dist/lodash.compat.js b/dist/lodash.compat.js
index 4179f79a4..93f0f1d73 100644
--- a/dist/lodash.compat.js
+++ b/dist/lodash.compat.js
@@ -76,7 +76,7 @@
    * See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
    * for more details.
    */
-  var reRegExpChars = /[.*+?^${}()|[\]\\]/g;
+  var reRegExpChars = /[.*+?^${}()|[\]\/\\]/g;
 
   /** Used to detect functions containing a `this` reference */
   var reThis = /\bthis\b/;
@@ -305,8 +305,8 @@
   }
 
   /**
-   * Used by `_.max` and `_.min` as the default callback when a given
-   * collection is a string value.
+   * Used by `_.max` and `_.min` as the default callback when a given collection
+   * is a string value.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -317,7 +317,8 @@
   }
 
   /**
-   * Gets the index of the first character of `string` that is not found in `chars`.
+   * Used by `_.trim` and `_.trimLeft` to get the index of the first character
+   * of `string` that is not found in `chars`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -337,7 +338,8 @@
   }
 
   /**
-   * Gets the index of the last character of `string` that is not found in `chars`.
+   * Used by `_.trim` and `_.trimRight` to get the index of the last character
+   * of `string` that is not found in `chars`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -468,7 +470,8 @@
   }
 
   /**
-   * Gets the index of the first non-whitespace character of `string`.
+   * Used by `_.trim` and `_.trimLeft` to get the index of the first non-whitespace
+   * character of `string`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -489,7 +492,8 @@
   }
 
   /**
-   * Gets the index of the last non-whitespace character of `string`.
+   * Used by `_.trim` and `_.trimRight` to get the index of the last non-whitespace
+   * character of `string`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -5717,7 +5721,7 @@
      * // => { 'name': 'barney', 'employer': 'slate' }
      */
     function defaults(object) {
-      if (!object || arguments.length < 2) {
+      if (!object) {
         return object;
       }
       var args = slice(arguments);
@@ -6349,7 +6353,7 @@
       // and avoid a V8 bug
       // https://code.google.com/p/v8/issues/detail?id=2291
       var type = typeof value;
-      return (value && (type == 'function' || type == 'object')) || false;
+      return type == 'function' || (value && type == 'object') || false;
     }
 
     /**
@@ -6492,9 +6496,7 @@
      * // => false
      */
     function isRegExp(value) {
-      var type = typeof value;
-      return (value && (type == 'function' || type == 'object') &&
-        toString.call(value) == regexpClass) || false;
+      return (isObject(value) && toString.call(value) == regexpClass) || false;
     }
 
     /**
@@ -6739,13 +6741,13 @@
      * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] }
      */
     function merge(object, source, guard) {
-      if (!object) {
-        return object;
-      }
       var args = arguments,
           length = args.length,
           type = typeof guard;
 
+      if (!object || length < 2) {
+        return object;
+      }
       // enables use as a callback for functions like `_.reduce`
       if ((type == 'number' || type == 'string') && args[3] && args[3][guard] === source) {
         length = 2;
@@ -6924,9 +6926,10 @@
         if (isArr) {
           accumulator = [];
         } else {
-          var ctor = object && object.constructor,
-              proto = ctor && ctor.prototype;
-
+          if (isObject(object)) {
+            var ctor = object.constructor,
+                proto = ctor && ctor.prototype;
+          }
           accumulator = baseCreate(proto);
         }
       }
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index 74bac390e..2ea780b0b 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -29,8 +29,8 @@ t(o,r,n)&&e.push(o)}}else bt(n,function(n,r,u){t(n,r,u)&&e.push(n)});return e}fu
 });return r}function fr(n,t,r,e){var u=3>arguments.length;return t=c.createCallback(t,e,4),_t(n,function(n,e,o){r=u?(u=false,n):t(r,n,e,o)}),r}function cr(n){var t=-1,r=n&&n.length,e=$r(0>r?0:r>>>0);return bt(n,function(n){var r=It(0,++t);e[t]=e[r],e[r]=n}),e}function sr(n,t,r){var e;if(t=c.createCallback(t,r,3),Fe(n)){r=-1;for(var u=n.length;++r<u;)if(t(n[r],r,n))return true}else bt(n,function(n,r,u){return!(e=t(n,r,u))});return!!e}function pr(n,t){if(3>arguments.length)return Ft(n,b,null,t);if(n)var r=n[O]?n[O][2]:n.length,e=Vt(arguments,2),r=r-e.length;
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-}function wr(n){var t=typeof n;return n&&("function"==t||"object"==t)||false}function xr(n){var t=typeof n;return"number"==t||n&&"object"==t&&te.call(n)==et||false}function Cr(n){var t=typeof n;return n&&("function"==t||"object"==t)&&te.call(n)==ot||false}function jr(n){return typeof n=="string"||n&&typeof n=="object"&&te.call(n)==it||false}function kr(n){if(!wr(n))return[];for(var t,r=n.length,r=(typeof r=="number"&&0<r&&(Fe(n)||Se.nonEnumStrings&&jr(n)||Se.nonEnumArgs&&dr(n))&&r)>>>0,e=n.constructor,u=-1,o=e&&n===e.prototype,i=r-1,e=$r(r),a=0<r,l=Se.enumErrorProps&&(n===Xr||n instanceof Dr),f=Se.enumPrototypes&&typeof n=="function";++u<r;)e[u]=Mr(u);
+for(;++u<o;){t=e[u];for(var i=-1,l=Pe(t),f=l.length;++i<f;){var c=l[i];n[c]=a?a(n[c],t[c]):t[c]}}return n}function yr(t){if(!t)return t;var r=Vt(arguments);return r.push(n),vr.apply(null,r)}function mr(n){var t=[];return kt(n,function(n,r){_r(n)&&t.push(r)}),t.sort()}function dr(n){return n&&typeof n=="object"&&typeof n.length=="number"&&te.call(n)==G||false}function br(n){return n&&typeof n=="object"&&1===n.nodeType&&(Se.nodeClass?-1<te.call(n).indexOf("Element"):g(n))||false}function _r(n){return typeof n=="function"
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 return 1!=r||u!==u||wr(u)?function(e){var u=r;if(u&&!e)return false;for(var o=true;u--&&(o=t[u],o=le.call(e,o)&&At(e[o],n[o],null,true)););return o}:function(n){return n&&le.call(n,e)?(n=n[e],u===n&&(0!==u||1/u==1/n)):false}}function Lr(n,t,r){var e=true,u=t&&mr(t);t&&(r||u.length)||(null==r&&(r=t),t=n,n=c,u=mr(t)),false===r?e=false:wr(r)&&"chain"in r&&(e=r.chain),r=-1;for(var o=_r(n),i=u?u.length:0;++r<i;){var a=u[r],l=n[a]=t[a];o&&(n.prototype[a]=function(t){return function(){var r=this.__chain__,u=this.__wrapped__,o=[u];
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diff --git a/dist/lodash.js b/dist/lodash.js
index da17af6be..4eed30349 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -76,7 +76,7 @@
    * See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
    * for more details.
    */
-  var reRegExpChars = /[.*+?^${}()|[\]\\]/g;
+  var reRegExpChars = /[.*+?^${}()|[\]\/\\]/g;
 
   /** Used to detect functions containing a `this` reference */
   var reThis = /\bthis\b/;
@@ -299,8 +299,8 @@
   }
 
   /**
-   * Used by `_.max` and `_.min` as the default callback when a given
-   * collection is a string value.
+   * Used by `_.max` and `_.min` as the default callback when a given collection
+   * is a string value.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -311,7 +311,8 @@
   }
 
   /**
-   * Gets the index of the first character of `string` that is not found in `chars`.
+   * Used by `_.trim` and `_.trimLeft` to get the index of the first character
+   * of `string` that is not found in `chars`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -331,7 +332,8 @@
   }
 
   /**
-   * Gets the index of the last character of `string` that is not found in `chars`.
+   * Used by `_.trim` and `_.trimRight` to get the index of the last character
+   * of `string` that is not found in `chars`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -449,7 +451,8 @@
   }
 
   /**
-   * Gets the index of the first non-whitespace character of `string`.
+   * Used by `_.trim` and `_.trimLeft` to get the index of the first non-whitespace
+   * character of `string`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -470,7 +473,8 @@
   }
 
   /**
-   * Gets the index of the last non-whitespace character of `string`.
+   * Used by `_.trim` and `_.trimRight` to get the index of the last non-whitespace
+   * character of `string`.
    *
    * @private
    * @param {string} string The string to inspect.
@@ -5538,7 +5542,7 @@
      * // => { 'name': 'barney', 'employer': 'slate' }
      */
     function defaults(object) {
-      if (!object || arguments.length < 2) {
+      if (!object) {
         return object;
       }
       var args = slice(arguments);
@@ -6157,7 +6161,7 @@
       // and avoid a V8 bug
       // https://code.google.com/p/v8/issues/detail?id=2291
       var type = typeof value;
-      return (value && (type == 'function' || type == 'object')) || false;
+      return type == 'function' || (value && type == 'object') || false;
     }
 
     /**
@@ -6521,13 +6525,13 @@
      * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] }
      */
     function merge(object, source, guard) {
-      if (!object) {
-        return object;
-      }
       var args = arguments,
           length = args.length,
           type = typeof guard;
 
+      if (!object || length < 2) {
+        return object;
+      }
       // enables use as a callback for functions like `_.reduce`
       if ((type == 'number' || type == 'string') && args[3] && args[3][guard] === source) {
         length = 2;
@@ -6706,9 +6710,10 @@
         if (isArr) {
           accumulator = [];
         } else {
-          var ctor = object && object.constructor,
-              proto = ctor && ctor.prototype;
-
+          if (isObject(object)) {
+            var ctor = object.constructor,
+                proto = ctor && ctor.prototype;
+          }
           accumulator = baseCreate(proto);
         }
       }
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index 02572d5de..96dd4a512 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -28,10 +28,10 @@ for(t||!r||Nr(n[0])||(t=[]);++e<r;){var o=n[e];t?u[o]=t[e]:o&&(u[o[0]]=o[1])}ret
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diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index 5856b2ccb..3f374ac20 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -52,7 +52,7 @@
    * See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
    * for more details.
    */
-  var reRegExpChars = /[.*+?^${}()|[\]\\]/g;
+  var reRegExpChars = /[.*+?^${}()|[\]\/\\]/g;
 
   /** Used to match unescaped characters in compiled string literals */
   var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
@@ -4197,7 +4197,7 @@
     // and avoid a V8 bug
     // https://code.google.com/p/v8/issues/detail?id=2291
     var type = typeof value;
-    return (value && (type == 'function' || type == 'object')) || false;
+    return type == 'function' || (value && type == 'object') || false;
   }
 
   /**
@@ -4297,9 +4297,7 @@
    * // => false
    */
   function isRegExp(value) {
-    var type = typeof value;
-    return (value && (type == 'function' || type == 'object') &&
-      toString.call(value) == regexpClass) || false;
+    return (isObject(value) && toString.call(value) == regexpClass) || false;
   }
 
   /**
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
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