diff --git a/build/post-compile.js b/build/post-compile.js
index e59442391..0ff394d24 100644
--- a/build/post-compile.js
+++ b/build/post-compile.js
@@ -2,8 +2,9 @@
 ;(function() {
   'use strict';
 
-  /** The Node.js filesystem module */
-  var fs = require('fs');
+  /** Load Node.js modules */
+  var fs = require('fs'),
+      vm = require('vm');
 
   /** The minimal license/copyright template */
   var licenseTemplate = [
@@ -24,9 +25,6 @@
    * @returns {String} Returns the processed source.
    */
   function postprocess(source) {
-    // remove copyright header
-    source = source.replace(/^\/\**[\s\S]+?\*\/\n/, '');
-
     // correct overly aggressive Closure Compiler advanced optimization
     source = source
       .replace(/(document[^&]+&&)\s*(?:\w+|!\d)/, '$1!({toString:0}+"")')
@@ -37,15 +35,23 @@
         '\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000"'
       );
 
-    // replace vars for `false` and `true` with boolean literals
-    [/(\w+)\s*=\s*!1\b/, /(\w+)\s*=\s*!0\b/].forEach(function(regexp, index) {
-      var varName = (regexp.exec(source) || 0)[1];
-      if (varName) {
-        source = source.replace(RegExp('([!=]==\\s*)' + varName + '\\b|\\b' + varName + '(\\s*[!=]==)', 'g'), function(match, prelude, postlude, at) {
+    try {
+      var context = vm.createContext({});
+      vm.runInContext(source, context);
+    } catch(e) { }
+
+    ['forEach', 'forIn', 'forOwn'].forEach(function(methodName) {
+      var pairs = /[!=]==\s*([a-zA-Z]+)(?!\()|([a-zA-Z]+)\s*[!=]==/.exec((context._ || {})[methodName]),
+          varName = pairs && (pairs[1] || pairs[2]),
+          value = (value = varName && RegExp('\\b' + varName + '\\s*=\\s*!([01])\\b').exec(source)) && !+value[1];
+
+      if (typeof value == 'boolean') {
+        // replace vars for `false` and `true` with boolean literals
+        source = source.replace(RegExp('([!=]==\\s*)' + varName + '\\b(?!\\()|\\b' + varName + '(\\s*[!=]==)', 'g'), function(match, prelude, postlude, at) {
           // avoid replacing local variables with the same name
           return RegExp('\\b' + varName + '\\s*(?:,|=[^=])').test(source.slice(at - 10, at))
             ? match
-            : (prelude || '') + !!index + (postlude || '');
+            : (prelude || '') + value + (postlude || '');
         });
       }
     });
@@ -78,6 +84,9 @@
     if (!snippet) {
       return source;
     }
+    // remove copyright header
+    source = source.replace(/^\/\**[\s\S]+?\*\/\n/, '');
+
     // add new copyright header
     var version = snippet[2];
     source = licenseTemplate.replace('<%= VERSION %>', version) + '\n;' + source;
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index ea31278f3..16ece43dc 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -9,12 +9,12 @@
 if(s){for(;++i<p;)u(n[i]);o&&(s=v=g=null)}return s?{contains:e,push:u}:{contains:t,push:r}}function K(){for(var n,t={g:x,b:"",c:"",e:"r",f:"",h:"",i:!0,j:!!Br},r=0;n=arguments[r];r++)for(var e in n)t[e]=n[e];r=t.a,t.d=/^[^,]+/.exec(r)[0],n=Rt,r="return function("+r+"){",e="var m,r="+t.d+",C="+t.e+";if(!r)return C;"+t.h+";",t.b?(e+="var s=r.length;m=-1;if("+t.b+"){",xr.unindexedChars&&(e+="if(q(r)){r=r.split('')}"),e+="while(++m<s){"+t.f+";}}else{"):xr.nonEnumArgs&&(e+="var s=r.length;m=-1;if(s&&n(r)){while(++m<s){m+='';"+t.f+";}}else{"),xr.enumPrototypes&&(e+="var E=typeof r=='function';"),xr.enumErrorProps&&(e+="var D=r===j||r instanceof Error;");
 var u=[];if(xr.enumPrototypes&&u.push('!(E&&m=="prototype")'),xr.enumErrorProps&&u.push('!(D&&(m=="message"||m=="name"))'),t.i&&t.j)e+="var A=-1,B=z[typeof r]?t(r):[],s=B.length;while(++A<s){m=B[A];",u.length&&(e+="if("+u.join("&&")+"){"),e+=t.f+";",u.length&&(e+="}"),e+="}";else if(e+="for(m in r){",t.i&&u.push("l.call(r, m)"),u.length&&(e+="if("+u.join("&&")+"){"),e+=t.f+";",u.length&&(e+="}"),e+="}",xr.nonEnumShadows){for(e+="if(r!==y){var h=r.constructor,p=r===(h&&h.prototype),e=r===H?G:r===j?i:J.call(r),v=w[e];",k=0;7>k;k++)e+="m='"+t.g[k]+"';if((!(p&&v[m])&&l.call(r,m))",t.i||(e+="||(!v[m]&&r[m]!==y[m])"),e+="){"+t.f+"}";
 e+="}"}return(t.b||xr.nonEnumArgs)&&(e+="}"),e+=t.c+";return C",n("i,j,l,n,o,q,t,u,y,z,w,G,H,J",r+e+"}")(I,Ut,ur,et,Ar,pt,Br,a,Vt,q,kr,F,Qt,lr)}function M(n){return lt(n)?pr(n):{}}function U(n){return Pr[n]}function V(n){return"\\"+D[n]}function Q(){var n=(n=a.indexOf)==Ot?T:n;return n}function W(n){return typeof n.toString!="function"&&typeof(n+"")=="string"}function X(n){this.__wrapped__=n}function Y(){}function Z(n){return function(t,e,u,o){return typeof e!="boolean"&&null!=e&&(o=u,u=o&&o[e]===t?r:e,e=!1),null!=u&&(u=a.createCallback(u,o)),n(t,e,u,o)
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@@ -40,8 +40,8 @@ var e=-1,u=$t(n);for(t=a.createCallback(t,r,1);++e<n;)u[e]=t(e);return u},a.toAr
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diff --git a/dist/lodash.js b/dist/lodash.js
index fd4c3b4c3..2cf66ece0 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -2059,9 +2059,9 @@
     }
 
     /**
-     * Transforms an `object` to an new `accumulator` object which is the result
+     * Transforms an `object` to a new `accumulator` object which is the result
      * of running each of its elements through the `callback`, with each `callback`
-     * execution potentially mutating the `accumulator` object. The `callback`is
+     * execution potentially mutating the `accumulator` object. The `callback` is
      * bound to `thisArg` and invoked with four arguments; (accumulator, value, key, object).
      * Callbacks may exit iteration early by explicitly returning `false`.
      *
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index 4d677a540..f4ff99db4 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
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