Merge branch 'sentry-js' into 'master'

Add Sentry logging for JavaScript errors

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/12675

See merge request !3795

5 files changed, 2482 insertions, 0 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 9cfa04b1e63..5f8b4e24e69 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -86,6 +86,7 @@ v 8.7.0 (unreleased)
   - Fix repository cache invalidation issue when project is recreated with an empty repo (Stan Hu)
   - Fix: Allow empty recipients list for builds emails service when pushed is added (Frank Groeneveld)
   - Improved markdown forms
+  - Show JavaScript errors in sentry
   - Delete tags using Rugged for performance reasons (Robert Schilling)
   - Add Slack notifications when Wiki is edited (Sebastian Klier)
   - Diffs load at the correct point when linking from from number
diff --git a/app/assets/javascripts/application.js.coffee b/app/assets/javascripts/application.js.coffee
index 5bac8eef1cb..642e7429acf 100644
--- a/app/assets/javascripts/application.js.coffee
+++ b/app/assets/javascripts/application.js.coffee
@@ -55,6 +55,7 @@
 #= require_tree .
 #= require fuzzaldrin-plus
 #= require cropper
+#= require raven
 
 window.slugify = (text) ->
   text.replace(/[^-a-zA-Z0-9]+/g, '_').toLowerCase()
diff --git a/app/assets/javascripts/raven_config.js.coffee b/app/assets/javascripts/raven_config.js.coffee
new file mode 100644
index 00000000000..d031a655abf
--- /dev/null
+++ b/app/assets/javascripts/raven_config.js.coffee
@@ -0,0 +1,44 @@
+@raven =
+  init: ->
+    if gon.sentry_dsn?
+      Raven.config(gon.sentry_dsn, {
+        includePaths: [/gon.relative_url_root/]
+        ignoreErrors: [
+          # Random plugins/extensions
+          'top.GLOBALS',
+          # See: http://blog.errorception.com/2012/03/tale-of-unfindable-js-error. html
+          'originalCreateNotification',
+          'canvas.contentDocument',
+          'MyApp_RemoveAllHighlights',
+          'http://tt.epicplay.com',
+          'Can\'t find variable: ZiteReader',
+          'jigsaw is not defined',
+          'ComboSearch is not defined',
+          'http://loading.retry.widdit.com/',
+          'atomicFindClose',
+          # ISP "optimizing" proxy - `Cache-Control: no-transform` seems to
+          # reduce this. (thanks @acdha)
+          # See http://stackoverflow.com/questions/4113268
+          'bmi_SafeAddOnload',
+          'EBCallBackMessageReceived',
+          # See http://toolbar.conduit.com/Developer/HtmlAndGadget/Methods/JSInjection.aspx
+          'conduitPage'
+        ],
+        ignoreUrls: [
+          # Chrome extensions
+          /extensions\//i,
+          /^chrome:\/\//i,
+          # Other plugins
+          /127\.0\.0\.1:4001\/isrunning/i,  # Cacaoweb
+          /webappstoolbarba\.texthelp\.com\//i,
+          /metrics\.itunes\.apple\.com\.edgesuite\.net\//i
+        ]
+      }).install()
+
+    if gon.current_user_id
+      Raven.setUserContext({
+        id: gon.current_user_id
+      })
+
+$ ->
+  raven.init()
diff --git a/lib/gitlab/gon_helper.rb b/lib/gitlab/gon_helper.rb
index 5ebaad6ca6e..eb27d82f110 100644
--- a/lib/gitlab/gon_helper.rb
+++ b/lib/gitlab/gon_helper.rb
@@ -7,6 +7,7 @@ module Gitlab
       gon.max_file_size          = current_application_settings.max_attachment_size
       gon.relative_url_root      = Gitlab.config.gitlab.relative_url_root
       gon.user_color_scheme      = Gitlab::ColorSchemes.for_user(current_user).css_class
+      gon.sentry_dsn             = ApplicationSetting.current.sentry_dsn if Rails.env.production?
 
       if current_user
         gon.current_user_id = current_user.id
diff --git a/vendor/assets/javascripts/raven.js b/vendor/assets/javascripts/raven.js
new file mode 100644
index 00000000000..d99c6f1c2c8
--- /dev/null
+++ b/vendor/assets/javascripts/raven.js
@@ -0,0 +1,2435 @@
+/*! Raven.js 2.3.0 (b09d766) | github.com/getsentry/raven-js */
+
+/*
+ * Includes TraceKit
+ * https://github.com/getsentry/TraceKit
+ *
+ * Copyright 2016 Matt Robenolt and other contributors
+ * Released under the BSD license
+ * https://github.com/getsentry/raven-js/blob/master/LICENSE
+ *
+ */
+
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Raven = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
+'use strict';
+
+function RavenConfigError(message) {
+    this.name = 'RavenConfigError';
+    this.message = message;
+}
+RavenConfigError.prototype = new Error();
+RavenConfigError.prototype.constructor = RavenConfigError;
+
+module.exports = RavenConfigError;
+
+},{}],2:[function(_dereq_,module,exports){
+/*global XDomainRequest:false*/
+'use strict';
+
+var TraceKit = _dereq_(5);
+var RavenConfigError = _dereq_(1);
+var utils = _dereq_(4);
+
+var isFunction = utils.isFunction;
+var isUndefined = utils.isUndefined;
+var isError = utils.isError;
+var isEmptyObject = utils.isEmptyObject;
+var hasKey = utils.hasKey;
+var joinRegExp = utils.joinRegExp;
+var each = utils.each;
+var objectMerge = utils.objectMerge;
+var truncate = utils.truncate;
+var urlencode = utils.urlencode;
+var uuid4 = utils.uuid4;
+
+var dsnKeys = 'source protocol user pass host port path'.split(' '),
+    dsnPattern = /^(?:(\w+):)?\/\/(?:(\w+)(:\w+)?@)?([\w\.-]+)(?::(\d+))?(\/.*)/;
+
+function now() {
+    return +new Date();
+}
+
+// First, check for JSON support
+// If there is no JSON, we no-op the core features of Raven
+// since JSON is required to encode the payload
+function Raven() {
+    this._hasJSON = !!(typeof JSON === 'object' && JSON.stringify);
+    // Raven can run in contexts where there's no document (react-native)
+    this._hasDocument = typeof document !== 'undefined';
+    this._lastCapturedException = null;
+    this._lastEventId = null;
+    this._globalServer = null;
+    this._globalKey = null;
+    this._globalProject = null;
+    this._globalContext = {};
+    this._globalOptions = {
+        logger: 'javascript',
+        ignoreErrors: [],
+        ignoreUrls: [],
+        whitelistUrls: [],
+        includePaths: [],
+        crossOrigin: 'anonymous',
+        collectWindowErrors: true,
+        maxMessageLength: 0,
+        stackTraceLimit: 50
+    };
+    this._ignoreOnError = 0;
+    this._isRavenInstalled = false;
+    this._originalErrorStackTraceLimit = Error.stackTraceLimit;
+    // capture references to window.console *and* all its methods first
+    // before the console plugin has a chance to monkey patch
+    this._originalConsole = window.console || {};
+    this._originalConsoleMethods = {};
+    this._plugins = [];
+    this._startTime = now();
+    this._wrappedBuiltIns = [];
+
+    for (var method in this._originalConsole) {  // eslint-disable-line guard-for-in
+      this._originalConsoleMethods[method] = this._originalConsole[method];
+    }
+}
+
+/*
+ * The core Raven singleton
+ *
+ * @this {Raven}
+ */
+
+Raven.prototype = {
+    // Hardcode version string so that raven source can be loaded directly via
+    // webpack (using a build step causes webpack #1617). Grunt verifies that
+    // this value matches package.json during build.
+    //   See: https://github.com/getsentry/raven-js/issues/465
+    VERSION: '2.3.0',
+
+    debug: false,
+
+    TraceKit: TraceKit, // alias to TraceKit
+
+    /*
+     * Configure Raven with a DSN and extra options
+     *
+     * @param {string} dsn The public Sentry DSN
+     * @param {object} options Optional set of of global options [optional]
+     * @return {Raven}
+     */
+    config: function(dsn, options) {
+        var self = this;
+
+        if (this._globalServer) {
+                this._logDebug('error', 'Error: Raven has already been configured');
+            return this;
+        }
+        if (!dsn) return this;
+
+        // merge in options
+        if (options) {
+            each(options, function(key, value){
+                // tags and extra are special and need to be put into context
+                if (key === 'tags' || key === 'extra') {
+                    self._globalContext[key] = value;
+                } else {
+                    self._globalOptions[key] = value;
+                }
+            });
+        }
+
+        var uri = this._parseDSN(dsn),
+            lastSlash = uri.path.lastIndexOf('/'),
+            path = uri.path.substr(1, lastSlash);
+
+        this._dsn = dsn;
+
+        // "Script error." is hard coded into browsers for errors that it can't read.
+        // this is the result of a script being pulled in from an external domain and CORS.
+        this._globalOptions.ignoreErrors.push(/^Script error\.?$/);
+        this._globalOptions.ignoreErrors.push(/^Javascript error: Script error\.? on line 0$/);
+
+        // join regexp rules into one big rule
+        this._globalOptions.ignoreErrors = joinRegExp(this._globalOptions.ignoreErrors);
+        this._globalOptions.ignoreUrls = this._globalOptions.ignoreUrls.length ? joinRegExp(this._globalOptions.ignoreUrls) : false;
+        this._globalOptions.whitelistUrls = this._globalOptions.whitelistUrls.length ? joinRegExp(this._globalOptions.whitelistUrls) : false;
+        this._globalOptions.includePaths = joinRegExp(this._globalOptions.includePaths);
+
+        this._globalKey = uri.user;
+        this._globalSecret = uri.pass && uri.pass.substr(1);
+        this._globalProject = uri.path.substr(lastSlash + 1);
+
+        this._globalServer = this._getGlobalServer(uri);
+
+        this._globalEndpoint = this._globalServer +
+            '/' + path + 'api/' + this._globalProject + '/store/';
+
+        if (this._globalOptions.fetchContext) {
+            TraceKit.remoteFetching = true;
+        }
+
+        if (this._globalOptions.linesOfContext) {
+            TraceKit.linesOfContext = this._globalOptions.linesOfContext;
+        }
+
+        TraceKit.collectWindowErrors = !!this._globalOptions.collectWindowErrors;
+
+        // return for chaining
+        return this;
+    },
+
+    /*
+     * Installs a global window.onerror error handler
+     * to capture and report uncaught exceptions.
+     * At this point, install() is required to be called due
+     * to the way TraceKit is set up.
+     *
+     * @return {Raven}
+     */
+    install: function() {
+        var self = this;
+        if (this.isSetup() && !this._isRavenInstalled) {
+            TraceKit.report.subscribe(function () {
+                self._handleOnErrorStackInfo.apply(self, arguments);
+            });
+            this._wrapBuiltIns();
+
+            // Install all of the plugins
+            this._drainPlugins();
+
+            this._isRavenInstalled = true;
+        }
+
+        Error.stackTraceLimit = this._globalOptions.stackTraceLimit;
+        return this;
+    },
+
+    /*
+     * Wrap code within a context so Raven can capture errors
+     * reliably across domains that is executed immediately.
+     *
+     * @param {object} options A specific set of options for this context [optional]
+     * @param {function} func The callback to be immediately executed within the context
+     * @param {array} args An array of arguments to be called with the callback [optional]
+     */
+    context: function(options, func, args) {
+        if (isFunction(options)) {
+            args = func || [];
+            func = options;
+            options = undefined;
+        }
+
+        return this.wrap(options, func).apply(this, args);
+    },
+
+    /*
+     * Wrap code within a context and returns back a new function to be executed
+     *
+     * @param {object} options A specific set of options for this context [optional]
+     * @param {function} func The function to be wrapped in a new context
+     * @return {function} The newly wrapped functions with a context
+     */
+    wrap: function(options, func) {
+        var self = this;
+
+        // 1 argument has been passed, and it's not a function
+        // so just return it
+        if (isUndefined(func) && !isFunction(options)) {
+            return options;
+        }
+
+        // options is optional
+        if (isFunction(options)) {
+            func = options;
+            options = undefined;
+        }
+
+        // At this point, we've passed along 2 arguments, and the second one
+        // is not a function either, so we'll just return the second argument.
+        if (!isFunction(func)) {
+            return func;
+        }
+
+        // We don't wanna wrap it twice!
+        try {
+            if (func.__raven__) {
+                return func;
+            }
+        } catch (e) {
+            // Just accessing the __raven__ prop in some Selenium environments
+            // can cause a "Permission denied" exception (see raven-js#495).
+            // Bail on wrapping and return the function as-is (defers to window.onerror).
+            return func;
+        }
+
+        // If this has already been wrapped in the past, return that
+        if (func.__raven_wrapper__ ){
+            return func.__raven_wrapper__ ;
+        }
+
+        function wrapped() {
+            var args = [], i = arguments.length,
+                deep = !options || options && options.deep !== false;
+            // Recursively wrap all of a function's arguments that are
+            // functions themselves.
+
+            while(i--) args[i] = deep ? self.wrap(options, arguments[i]) : arguments[i];
+
+            try {
+                return func.apply(this, args);
+            } catch(e) {
+                self._ignoreNextOnError();
+                self.captureException(e, options);
+                throw e;
+            }
+        }
+
+        // copy over properties of the old function
+        for (var property in func) {
+            if (hasKey(func, property)) {
+                wrapped[property] = func[property];
+            }
+        }
+        func.__raven_wrapper__ = wrapped;
+
+        wrapped.prototype = func.prototype;
+
+        // Signal that this function has been wrapped already
+        // for both debugging and to prevent it to being wrapped twice
+        wrapped.__raven__ = true;
+        wrapped.__inner__ = func;
+
+        return wrapped;
+    },
+
+    /*
+     * Uninstalls the global error handler.
+     *
+     * @return {Raven}
+     */
+    uninstall: function() {
+        TraceKit.report.uninstall();
+
+        this._restoreBuiltIns();
+
+        Error.stackTraceLimit = this._originalErrorStackTraceLimit;
+        this._isRavenInstalled = false;
+
+        return this;
+    },
+
+    /*
+     * Manually capture an exception and send it over to Sentry
+     *
+     * @param {error} ex An exception to be logged
+     * @param {object} options A specific set of options for this error [optional]
+     * @return {Raven}
+     */
+    captureException: function(ex, options) {
+        // If not an Error is passed through, recall as a message instead
+        if (!isError(ex)) return this.captureMessage(ex, options);
+
+        // Store the raw exception object for potential debugging and introspection
+        this._lastCapturedException = ex;
+
+        // TraceKit.report will re-raise any exception passed to it,
+        // which means you have to wrap it in try/catch. Instead, we
+        // can wrap it here and only re-raise if TraceKit.report
+        // raises an exception different from the one we asked to
+        // report on.
+        try {
+            var stack = TraceKit.computeStackTrace(ex);
+            this._handleStackInfo(stack, options);
+        } catch(ex1) {
+            if(ex !== ex1) {
+                throw ex1;
+            }
+        }
+
+        return this;
+    },
+
+    /*
+     * Manually send a message to Sentry
+     *
+     * @param {string} msg A plain message to be captured in Sentry
+     * @param {object} options A specific set of options for this message [optional]
+     * @return {Raven}
+     */
+    captureMessage: function(msg, options) {
+        // config() automagically converts ignoreErrors from a list to a RegExp so we need to test for an
+        // early call; we'll error on the side of logging anything called before configuration since it's
+        // probably something you should see:
+        if (!!this._globalOptions.ignoreErrors.test && this._globalOptions.ignoreErrors.test(msg)) {
+            return;
+        }
+
+        // Fire away!
+        this._send(
+            objectMerge({
+                message: msg + ''  // Make sure it's actually a string
+            }, options)
+        );
+
+        return this;
+    },
+
+    addPlugin: function(plugin /*arg1, arg2, ... argN*/) {
+        var pluginArgs = Array.prototype.slice.call(arguments, 1);
+
+        this._plugins.push([plugin, pluginArgs]);
+        if (this._isRavenInstalled) {
+            this._drainPlugins();
+        }
+
+        return this;
+    },
+
+    /*
+     * Set/clear a user to be sent along with the payload.
+     *
+     * @param {object} user An object representing user data [optional]
+     * @return {Raven}
+     */
+    setUserContext: function(user) {
+        // Intentionally do not merge here since that's an unexpected behavior.
+        this._globalContext.user = user;
+
+        return this;
+    },
+
+    /*
+     * Merge extra attributes to be sent along with the payload.
+     *
+     * @param {object} extra An object representing extra data [optional]
+     * @return {Raven}
+     */
+    setExtraContext: function(extra) {
+        this._mergeContext('extra', extra);
+
+        return this;
+    },
+
+    /*
+     * Merge tags to be sent along with the payload.
+     *
+     * @param {object} tags An object representing tags [optional]
+     * @return {Raven}
+     */
+    setTagsContext: function(tags) {
+        this._mergeContext('tags', tags);
+
+        return this;
+    },
+
+    /*
+     * Clear all of the context.
+     *
+     * @return {Raven}
+     */
+    clearContext: function() {
+        this._globalContext = {};
+
+        return this;
+    },
+
+    /*
+     * Get a copy of the current context. This cannot be mutated.
+     *
+     * @return {object} copy of context
+     */
+    getContext: function() {
+        // lol javascript
+        return JSON.parse(JSON.stringify(this._globalContext));
+    },
+
+    /*
+     * Set release version of application
+     *
+     * @param {string} release Typically something like a git SHA to identify version
+     * @return {Raven}
+     */
+    setRelease: function(release) {
+        this._globalOptions.release = release;
+
+        return this;
+    },
+
+    /*
+     * Set the dataCallback option
+     *
+     * @param {function} callback The callback to run which allows the
+     *                            data blob to be mutated before sending
+     * @return {Raven}
+     */
+    setDataCallback: function(callback) {
+        this._globalOptions.dataCallback = callback;
+
+        return this;
+    },
+
+    /*
+     * Set the shouldSendCallback option
+     *
+     * @param {function} callback The callback to run which allows
+     *                            introspecting the blob before sending
+     * @return {Raven}
+     */
+    setShouldSendCallback: function(callback) {
+        this._globalOptions.shouldSendCallback = callback;
+
+        return this;
+    },
+
+    /**
+     * Override the default HTTP transport mechanism that transmits data
+     * to the Sentry server.
+     *
+     * @param {function} transport Function invoked instead of the default
+     *                             `makeRequest` handler.
+     *
+     * @return {Raven}
+     */
+    setTransport: function(transport) {
+        this._globalOptions.transport = transport;
+
+        return this;
+    },
+
+    /*
+     * Get the latest raw exception that was captured by Raven.
+     *
+     * @return {error}
+     */
+    lastException: function() {
+        return this._lastCapturedException;
+    },
+
+    /*
+     * Get the last event id
+     *
+     * @return {string}
+     */
+    lastEventId: function() {
+        return this._lastEventId;
+    },
+
+    /*
+     * Determine if Raven is setup and ready to go.
+     *
+     * @return {boolean}
+     */
+    isSetup: function() {
+        if (!this._hasJSON) return false;  // needs JSON support
+        if (!this._globalServer) {
+            if (!this.ravenNotConfiguredError) {
+              this.ravenNotConfiguredError = true;
+              this._logDebug('error', 'Error: Raven has not been configured.');
+            }
+            return false;
+        }
+        return true;
+    },
+
+    afterLoad: function () {
+        // TODO: remove window dependence?
+
+        // Attempt to initialize Raven on load
+        var RavenConfig = window.RavenConfig;
+        if (RavenConfig) {
+            this.config(RavenConfig.dsn, RavenConfig.config).install();
+        }
+    },
+
+    showReportDialog: function (options) {
+        if (!window.document) // doesn't work without a document (React native)
+            return;
+
+        options = options || {};
+
+        var lastEventId = options.eventId || this.lastEventId();
+        if (!lastEventId) {
+            throw new RavenConfigError('Missing eventId');
+        }
+
+        var dsn = options.dsn || this._dsn;
+        if (!dsn) {
+            throw new RavenConfigError('Missing DSN');
+        }
+
+        var encode = encodeURIComponent;
+        var qs = '';
+        qs += '?eventId=' + encode(lastEventId);
+        qs += '&dsn=' + encode(dsn);
+
+        var user = options.user || this._globalContext.user;
+        if (user) {
+            if (user.name)  qs += '&name=' + encode(user.name);
+            if (user.email) qs += '&email=' + encode(user.email);
+        }
+
+        var globalServer = this._getGlobalServer(this._parseDSN(dsn));
+
+        var script = document.createElement('script');
+        script.async = true;
+        script.src = globalServer + '/api/embed/error-page/' + qs;
+        (document.head || document.body).appendChild(script);
+    },
+
+    /**** Private functions ****/
+    _ignoreNextOnError: function () {
+        var self = this;
+        this._ignoreOnError += 1;
+        setTimeout(function () {
+            // onerror should trigger before setTimeout
+            self._ignoreOnError -= 1;
+        });
+    },
+
+    _triggerEvent: function(eventType, options) {
+        // NOTE: `event` is a native browser thing, so let's avoid conflicting wiht it
+        var evt, key;
+
+        if (!this._hasDocument)
+            return;
+
+        options = options || {};
+
+        eventType = 'raven' + eventType.substr(0,1).toUpperCase() + eventType.substr(1);
+
+        if (document.createEvent) {
+            evt = document.createEvent('HTMLEvents');
+            evt.initEvent(eventType, true, true);
+        } else {
+            evt = document.createEventObject();
+            evt.eventType = eventType;
+        }
+
+        for (key in options) if (hasKey(options, key)) {
+            evt[key] = options[key];
+        }
+
+        if (document.createEvent) {
+            // IE9 if standards
+            document.dispatchEvent(evt);
+        } else {
+            // IE8 regardless of Quirks or Standards
+            // IE9 if quirks
+            try {
+                document.fireEvent('on' + evt.eventType.toLowerCase(), evt);
+            } catch(e) {
+                // Do nothing
+            }
+        }
+    },
+
+    /**
+     * Install any queued plugins
+     */
+    _wrapBuiltIns: function() {
+        var self = this;
+
+        function fill(obj, name, replacement, noUndo) {
+            var orig = obj[name];
+            obj[name] = replacement(orig);
+            if (!noUndo) {
+                self._wrappedBuiltIns.push([obj, name, orig]);
+            }
+        }
+
+        function wrapTimeFn(orig) {
+            return function (fn, t) { // preserve arity
+                // Make a copy of the arguments
+                var args = [].slice.call(arguments);
+                var originalCallback = args[0];
+                if (isFunction(originalCallback)) {
+                    args[0] = self.wrap(originalCallback);
+                }
+
+                // IE < 9 doesn't support .call/.apply on setInterval/setTimeout, but it
+                // also supports only two arguments and doesn't care what this is, so we
+                // can just call the original function directly.
+                if (orig.apply) {
+                    return orig.apply(this, args);
+                } else {
+                    return orig(args[0], args[1]);
+                }
+            };
+        }
+
+        fill(window, 'setTimeout', wrapTimeFn);
+        fill(window, 'setInterval', wrapTimeFn);
+        if (window.requestAnimationFrame) {
+            fill(window, 'requestAnimationFrame', function (orig) {
+                return function (cb) {
+                    return orig(self.wrap(cb));
+                };
+            });
+        }
+
+        // event targets borrowed from bugsnag-js:
+        // https://github.com/bugsnag/bugsnag-js/blob/master/src/bugsnag.js#L666
+        'EventTarget Window Node ApplicationCache AudioTrackList ChannelMergerNode CryptoOperation EventSource FileReader HTMLUnknownElement IDBDatabase IDBRequest IDBTransaction KeyOperation MediaController MessagePort ModalWindow Notification SVGElementInstance Screen TextTrack TextTrackCue TextTrackList WebSocket WebSocketWorker Worker XMLHttpRequest XMLHttpRequestEventTarget XMLHttpRequestUpload'.replace(/\w+/g, function (global) {
+            var proto = window[global] && window[global].prototype;
+            if (proto && proto.hasOwnProperty && proto.hasOwnProperty('addEventListener')) {
+                fill(proto, 'addEventListener', function(orig) {
+                    return function (evt, fn, capture, secure) { // preserve arity
+                        try {
+                            if (fn && fn.handleEvent) {
+                                fn.handleEvent = self.wrap(fn.handleEvent);
+                            }
+                        } catch (err) {
+                            // can sometimes get 'Permission denied to access property "handle Event'
+                        }
+                        return orig.call(this, evt, self.wrap(fn), capture, secure);
+                    };
+                });
+                fill(proto, 'removeEventListener', function (orig) {
+                    return function (evt, fn, capture, secure) {
+                        fn = fn && (fn.__raven_wrapper__ ? fn.__raven_wrapper__  : fn);
+                        return orig.call(this, evt, fn, capture, secure);
+                    };
+                });
+            }
+        });
+
+        if ('XMLHttpRequest' in window) {
+            fill(XMLHttpRequest.prototype, 'send', function(origSend) {
+                return function (data) { // preserve arity
+                    var xhr = this;
+                    'onreadystatechange onload onerror onprogress'.replace(/\w+/g, function (prop) {
+                        if (prop in xhr && Object.prototype.toString.call(xhr[prop]) === '[object Function]') {
+                            fill(xhr, prop, function (orig) {
+                                return self.wrap(orig);
+                            }, true /* noUndo */); // don't track filled methods on XHR instances
+                        }
+                    });
+                    return origSend.apply(this, arguments);
+                };
+            });
+        }
+
+        var $ = window.jQuery || window.$;
+        if ($ && $.fn && $.fn.ready) {
+            fill($.fn, 'ready', function (orig) {
+                return function (fn) {
+                    return orig.call(this, self.wrap(fn));
+                };
+            });
+        }
+    },
+
+    _restoreBuiltIns: function () {
+        // restore any wrapped builtins
+        var builtin;
+        while (this._wrappedBuiltIns.length) {
+            builtin = this._wrappedBuiltIns.shift();
+
+            var obj = builtin[0],
+              name = builtin[1],
+              orig = builtin[2];
+
+            obj[name] = orig;
+        }
+    },
+
+    _drainPlugins: function() {
+        var self = this;
+
+        // FIX ME TODO
+        each(this._plugins, function(_, plugin) {
+            var installer = plugin[0];
+            var args = plugin[1];
+            installer.apply(self, [self].concat(args));
+        });
+    },
+
+    _parseDSN: function(str) {
+        var m = dsnPattern.exec(str),
+            dsn = {},
+            i = 7;
+
+        try {
+            while (i--) dsn[dsnKeys[i]] = m[i] || '';
+        } catch(e) {
+            throw new RavenConfigError('Invalid DSN: ' + str);
+        }
+
+        if (dsn.pass && !this._globalOptions.allowSecretKey) {
+            throw new RavenConfigError('Do not specify your secret key in the DSN. See: http://bit.ly/raven-secret-key');
+        }
+
+        return dsn;
+    },
+
+    _getGlobalServer: function(uri) {
+        // assemble the endpoint from the uri pieces
+        var globalServer = '//' + uri.host +
+            (uri.port ? ':' + uri.port : '');
+
+        if (uri.protocol) {
+            globalServer = uri.protocol + ':' + globalServer;
+        }
+        return globalServer;
+    },
+
+    _handleOnErrorStackInfo: function() {
+        // if we are intentionally ignoring errors via onerror, bail out
+        if (!this._ignoreOnError) {
+            this._handleStackInfo.apply(this, arguments);
+        }
+    },
+
+    _handleStackInfo: function(stackInfo, options) {
+        var self = this;
+        var frames = [];
+
+        if (stackInfo.stack && stackInfo.stack.length) {
+            each(stackInfo.stack, function(i, stack) {
+                var frame = self._normalizeFrame(stack);
+                if (frame) {
+                    frames.push(frame);
+                }
+            });
+        }
+
+        this._triggerEvent('handle', {
+            stackInfo: stackInfo,
+            options: options
+        });
+
+        this._processException(
+            stackInfo.name,
+            stackInfo.message,
+            stackInfo.url,
+            stackInfo.lineno,
+            frames.slice(0, this._globalOptions.stackTraceLimit),
+            options
+        );
+    },
+
+    _normalizeFrame: function(frame) {
+        if (!frame.url) return;
+
+        // normalize the frames data
+        var normalized = {
+            filename:   frame.url,
+            lineno:     frame.line,
+            colno:      frame.column,
+            'function': frame.func || '?'
+        }, context = this._extractContextFromFrame(frame), i;
+
+        if (context) {
+            var keys = ['pre_context', 'context_line', 'post_context'];
+            i = 3;
+            while (i--) normalized[keys[i]] = context[i];
+        }
+
+        normalized.in_app = !( // determine if an exception came from outside of our app
+            // first we check the global includePaths list.
+            !!this._globalOptions.includePaths.test && !this._globalOptions.includePaths.test(normalized.filename) ||
+            // Now we check for fun, if the function name is Raven or TraceKit
+            /(Raven|TraceKit)\./.test(normalized['function']) ||
+            // finally, we do a last ditch effort and check for raven.min.js
+            /raven\.(min\.)?js$/.test(normalized.filename)
+        );
+
+        return normalized;
+    },
+
+    _extractContextFromFrame: function(frame) {
+        // immediately check if we should even attempt to parse a context
+        if (!frame.context || !this._globalOptions.fetchContext) return;
+
+        var context = frame.context,
+            pivot = ~~(context.length / 2),
+            i = context.length, isMinified = false;
+
+        while (i--) {
+            // We're making a guess to see if the source is minified or not.
+            // To do that, we make the assumption if *any* of the lines passed
+            // in are greater than 300 characters long, we bail.
+            // Sentry will see that there isn't a context
+            if (context[i].length > 300) {
+                isMinified = true;
+                break;
+            }
+        }
+
+        if (isMinified) {
+            // The source is minified and we don't know which column. Fuck it.
+            if (isUndefined(frame.column)) return;
+
+            // If the source is minified and has a frame column
+            // we take a chunk of the offending line to hopefully shed some light
+            return [
+                [],  // no pre_context
+                context[pivot].substr(frame.column, 50), // grab 50 characters, starting at the offending column
+                []   // no post_context
+            ];
+        }
+
+        return [
+            context.slice(0, pivot),    // pre_context
+            context[pivot],             // context_line
+            context.slice(pivot + 1)    // post_context
+        ];
+    },
+
+    _processException: function(type, message, fileurl, lineno, frames, options) {
+        var stacktrace, fullMessage;
+
+        if (!!this._globalOptions.ignoreErrors.test && this._globalOptions.ignoreErrors.test(message)) return;
+
+        message += '';
+        message = truncate(message, this._globalOptions.maxMessageLength);
+
+        fullMessage = (type ? type + ': ' : '') + message;
+        fullMessage = truncate(fullMessage, this._globalOptions.maxMessageLength);
+
+        if (frames && frames.length) {
+            fileurl = frames[0].filename || fileurl;
+            // Sentry expects frames oldest to newest
+            // and JS sends them as newest to oldest
+            frames.reverse();
+            stacktrace = {frames: frames};
+        } else if (fileurl) {
+            stacktrace = {
+                frames: [{
+                    filename: fileurl,
+                    lineno: lineno,
+                    in_app: true
+                }]
+            };
+        }
+
+        if (!!this._globalOptions.ignoreUrls.test && this._globalOptions.ignoreUrls.test(fileurl)) return;
+        if (!!this._globalOptions.whitelistUrls.test && !this._globalOptions.whitelistUrls.test(fileurl)) return;
+
+        var data = objectMerge({
+            // sentry.interfaces.Exception
+            exception: {
+                values: [{
+                    type: type,
+                    value: message,
+                    stacktrace: stacktrace
+                }]
+            },
+            culprit: fileurl,
+            message: fullMessage
+        }, options);
+
+        // Fire away!
+        this._send(data);
+    },
+
+    _trimPacket: function(data) {
+        // For now, we only want to truncate the two different messages
+        // but this could/should be expanded to just trim everything
+        var max = this._globalOptions.maxMessageLength;
+        data.message = truncate(data.message, max);
+        if (data.exception) {
+            var exception = data.exception.values[0];
+            exception.value = truncate(exception.value, max);
+        }
+
+        return data;
+    },
+
+    _getHttpData: function() {
+        if (!this._hasDocument || !document.location || !document.location.href) {
+            return;
+        }
+
+        var httpData = {
+            headers: {
+                'User-Agent': navigator.userAgent
+            }
+        };
+
+        httpData.url = document.location.href;
+
+        if (document.referrer) {
+            httpData.headers.Referer = document.referrer;
+        }
+
+        return httpData;
+    },
+
+
+    _send: function(data) {
+        var self = this;
+
+        var globalOptions = this._globalOptions;
+
+        var baseData = {
+            project: this._globalProject,
+            logger: globalOptions.logger,
+            platform: 'javascript'
+        }, httpData = this._getHttpData();
+
+        if (httpData) {
+            baseData.request = httpData;
+        }
+
+        data = objectMerge(baseData, data);
+
+        // Merge in the tags and extra separately since objectMerge doesn't handle a deep merge
+        data.tags = objectMerge(objectMerge({}, this._globalContext.tags), data.tags);
+        data.extra = objectMerge(objectMerge({}, this._globalContext.extra), data.extra);
+
+        // Send along our own collected metadata with extra
+        data.extra['session:duration'] = now() - this._startTime;
+
+        // If there are no tags/extra, strip the key from the payload alltogther.
+        if (isEmptyObject(data.tags)) delete data.tags;
+
+        if (this._globalContext.user) {
+            // sentry.interfaces.User
+            data.user = this._globalContext.user;
+        }
+
+        // Include the release if it's defined in globalOptions
+        if (globalOptions.release) data.release = globalOptions.release;
+
+        // Include server_name if it's defined in globalOptions
+        if (globalOptions.serverName) data.server_name = globalOptions.serverName;
+
+        if (isFunction(globalOptions.dataCallback)) {
+            data = globalOptions.dataCallback(data) || data;
+        }
+
+        // Why??????????
+        if (!data || isEmptyObject(data)) {
+            return;
+        }
+
+        // Check if the request should be filtered or not
+        if (isFunction(globalOptions.shouldSendCallback) && !globalOptions.shouldSendCallback(data)) {
+            return;
+        }
+
+        // Send along an event_id if not explicitly passed.
+        // This event_id can be used to reference the error within Sentry itself.
+        // Set lastEventId after we know the error should actually be sent
+        this._lastEventId = data.event_id || (data.event_id = uuid4());
+
+        // Try and clean up the packet before sending by truncating long values
+        data = this._trimPacket(data);
+
+        this._logDebug('debug', 'Raven about to send:', data);
+
+        if (!this.isSetup()) return;
+
+        var auth = {
+            sentry_version: '7',
+            sentry_client: 'raven-js/' + this.VERSION,
+            sentry_key: this._globalKey
+        };
+        if (this._globalSecret) {
+            auth.sentry_secret = this._globalSecret;
+        }
+
+        var url = this._globalEndpoint;
+        (globalOptions.transport || this._makeRequest).call(this, {
+            url: url,
+            auth: auth,
+            data: data,
+            options: globalOptions,
+            onSuccess: function success() {
+                self._triggerEvent('success', {
+                    data: data,
+                    src: url
+                });
+            },
+            onError: function failure() {
+                self._triggerEvent('failure', {
+                    data: data,
+                    src: url
+                });
+            }
+        });
+    },
+
+    _makeImageRequest: function(opts) {
+        // Tack on sentry_data to auth options, which get urlencoded
+        opts.auth.sentry_data = JSON.stringify(opts.data);
+
+        var img = this._newImage(),
+            src = opts.url + '?' + urlencode(opts.auth),
+            crossOrigin = opts.options.crossOrigin;
+
+        if (crossOrigin || crossOrigin === '') {
+            img.crossOrigin = crossOrigin;
+        }
+        img.onload = opts.onSuccess;
+        img.onerror = img.onabort = opts.onError;
+        img.src = src;
+    },
+
+    _makeXhrRequest: function(opts) {
+        var request;
+
+        var url = opts.url;
+        function handler() {
+            if (request.status === 200) {
+                if (opts.onSuccess) {
+                    opts.onSuccess();
+                }
+            } else if (opts.onError) {
+                opts.onError();
+            }
+        }
+
+        request = new XMLHttpRequest();
+        if ('withCredentials' in request) {
+            request.onreadystatechange = function () {
+                if (request.readyState !== 4) {
+                    return;
+                }
+                handler();
+            };
+        } else {
+            request = new XDomainRequest();
+            // xdomainrequest cannot go http -> https (or vice versa),
+            // so always use protocol relative
+            url = url.replace(/^https?:/, '');
+
+            // onreadystatechange not supported by XDomainRequest
+            request.onload = handler;
+        }
+
+        // NOTE: auth is intentionally sent as part of query string (NOT as custom
+        //       HTTP header) so as to avoid preflight CORS requests
+        request.open('POST', url + '?' + urlencode(opts.auth));
+        request.send(JSON.stringify(opts.data));
+    },
+
+    _makeRequest: function(opts) {
+        var hasCORS =
+            'withCredentials' in new XMLHttpRequest() ||
+            typeof XDomainRequest !== 'undefined';
+
+        return (hasCORS ? this._makeXhrRequest : this._makeImageRequest)(opts);
+    },
+
+    // Note: this is shitty, but I can't figure out how to get
+    // sinon to stub document.createElement without breaking everything
+    // so this wrapper is just so I can stub it for tests.
+    _newImage: function() {
+        return document.createElement('img');
+    },
+
+    _logDebug: function(level) {
+        if (this._originalConsoleMethods[level] && this.debug) {
+            // In IE<10 console methods do not have their own 'apply' method
+            Function.prototype.apply.call(
+                this._originalConsoleMethods[level],
+                this._originalConsole,
+                [].slice.call(arguments, 1)
+            );
+        }
+    },
+
+    _mergeContext: function(key, context) {
+        if (isUndefined(context)) {
+            delete this._globalContext[key];
+        } else {
+            this._globalContext[key] = objectMerge(this._globalContext[key] || {}, context);
+        }
+    }
+};
+
+// Deprecations
+Raven.prototype.setUser = Raven.prototype.setUserContext;
+Raven.prototype.setReleaseContext = Raven.prototype.setRelease;
+
+module.exports = Raven;
+
+},{"1":1,"4":4,"5":5}],3:[function(_dereq_,module,exports){
+/**
+ * Enforces a single instance of the Raven client, and the
+ * main entry point for Raven. If you are a consumer of the
+ * Raven library, you SHOULD load this file (vs raven.js).
+ **/
+
+'use strict';
+
+var RavenConstructor = _dereq_(2);
+
+var _Raven = window.Raven;
+
+var Raven = new RavenConstructor();
+
+/*
+ * Allow multiple versions of Raven to be installed.
+ * Strip Raven from the global context and returns the instance.
+ *
+ * @return {Raven}
+ */
+Raven.noConflict = function () {
+	window.Raven = _Raven;
+	return Raven;
+};
+
+Raven.afterLoad();
+
+module.exports = Raven;
+
+},{"2":2}],4:[function(_dereq_,module,exports){
+'use strict';
+
+var objectPrototype = Object.prototype;
+
+function isUndefined(what) {
+    return what === void 0;
+}
+
+function isFunction(what) {
+    return typeof what === 'function';
+}
+
+function isString(what) {
+    return objectPrototype.toString.call(what) === '[object String]';
+}
+
+function isObject(what) {
+    return typeof what === 'object' && what !== null;
+}
+
+function isEmptyObject(what) {
+    for (var _ in what) return false;  // eslint-disable-line guard-for-in, no-unused-vars
+    return true;
+}
+
+// Sorta yanked from https://github.com/joyent/node/blob/aa3b4b4/lib/util.js#L560
+// with some tiny modifications
+function isError(what) {
+    var toString = objectPrototype.toString.call(what);
+    return isObject(what) &&
+        toString === '[object Error]' ||
+        toString === '[object Exception]' || // Firefox NS_ERROR_FAILURE Exceptions
+        what instanceof Error;
+}
+
+function each(obj, callback) {
+    var i, j;
+
+    if (isUndefined(obj.length)) {
+        for (i in obj) {
+            if (hasKey(obj, i)) {
+                callback.call(null, i, obj[i]);
+            }
+        }
+    } else {
+        j = obj.length;
+        if (j) {
+            for (i = 0; i < j; i++) {
+                callback.call(null, i, obj[i]);
+            }
+        }
+    }
+}
+
+function objectMerge(obj1, obj2) {
+    if (!obj2) {
+        return obj1;
+    }
+    each(obj2, function(key, value){
+        obj1[key] = value;
+    });
+    return obj1;
+}
+
+function truncate(str, max) {
+    return !max || str.length <= max ? str : str.substr(0, max) + '\u2026';
+}
+
+/**
+ * hasKey, a better form of hasOwnProperty
+ * Example: hasKey(MainHostObject, property) === true/false
+ *
+ * @param {Object} host object to check property
+ * @param {string} key to check
+ */
+function hasKey(object, key) {
+    return objectPrototype.hasOwnProperty.call(object, key);
+}
+
+function joinRegExp(patterns) {
+    // Combine an array of regular expressions and strings into one large regexp
+    // Be mad.
+    var sources = [],
+        i = 0, len = patterns.length,
+        pattern;
+
+    for (; i < len; i++) {
+        pattern = patterns[i];
+        if (isString(pattern)) {
+            // If it's a string, we need to escape it
+            // Taken from: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
+            sources.push(pattern.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, '\\$1'));
+        } else if (pattern && pattern.source) {
+            // If it's a regexp already, we want to extract the source
+            sources.push(pattern.source);
+        }
+        // Intentionally skip other cases
+    }
+    return new RegExp(sources.join('|'), 'i');
+}
+
+function urlencode(o) {
+    var pairs = [];
+    each(o, function(key, value) {
+        pairs.push(encodeURIComponent(key) + '=' + encodeURIComponent(value));
+    });
+    return pairs.join('&');
+}
+
+function uuid4() {
+    var crypto = window.crypto || window.msCrypto;
+
+    if (!isUndefined(crypto) && crypto.getRandomValues) {
+        // Use window.crypto API if available
+        var arr = new Uint16Array(8);
+        crypto.getRandomValues(arr);
+
+        // set 4 in byte 7
+        arr[3] = arr[3] & 0xFFF | 0x4000;
+        // set 2 most significant bits of byte 9 to '10'
+        arr[4] = arr[4] & 0x3FFF | 0x8000;
+
+        var pad = function(num) {
+            var v = num.toString(16);
+            while (v.length < 4) {
+                v = '0' + v;
+            }
+            return v;
+        };
+
+        return pad(arr[0]) + pad(arr[1]) + pad(arr[2]) + pad(arr[3]) + pad(arr[4]) +
+        pad(arr[5]) + pad(arr[6]) + pad(arr[7]);
+    } else {
+        // http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/2117523#2117523
+        return 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
+            var r = Math.random()*16|0,
+                v = c === 'x' ? r : r&0x3|0x8;
+            return v.toString(16);
+        });
+    }
+}
+
+module.exports = {
+    isUndefined: isUndefined,
+    isFunction: isFunction,
+    isString: isString,
+    isObject: isObject,
+    isEmptyObject: isEmptyObject,
+    isError: isError,
+    each: each,
+    objectMerge: objectMerge,
+    truncate: truncate,
+    hasKey: hasKey,
+    joinRegExp: joinRegExp,
+    urlencode: urlencode,
+    uuid4: uuid4
+};
+
+},{}],5:[function(_dereq_,module,exports){
+'use strict';
+
+var utils = _dereq_(4);
+
+var hasKey = utils.hasKey;
+var isString = utils.isString;
+var isUndefined = utils.isUndefined;
+
+/*
+ TraceKit - Cross brower stack traces - github.com/occ/TraceKit
+ MIT license
+*/
+
+var TraceKit = {
+    remoteFetching: false,
+    collectWindowErrors: true,
+    // 3 lines before, the offending line, 3 lines after
+    linesOfContext: 7,
+    debug: false
+};
+
+// global reference to slice
+var _slice = [].slice;
+var UNKNOWN_FUNCTION = '?';
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error#Error_types
+var ERROR_TYPES_RE = /^(?:Uncaught )?((?:Eval|Internal|Range|Reference|Syntax|Type|URI)Error)\: ?(.*)$/;
+
+function getLocationHref() {
+    if (typeof document === 'undefined')
+        return '';
+
+    return document.location.href;
+}
+
+/**
+ * TraceKit.report: cross-browser processing of unhandled exceptions
+ *
+ * Syntax:
+ *   TraceKit.report.subscribe(function(stackInfo) { ... })
+ *   TraceKit.report.unsubscribe(function(stackInfo) { ... })
+ *   TraceKit.report(exception)
+ *   try { ...code... } catch(ex) { TraceKit.report(ex); }
+ *
+ * Supports:
+ *   - Firefox: full stack trace with line numbers, plus column number
+ *              on top frame; column number is not guaranteed
+ *   - Opera:   full stack trace with line and column numbers
+ *   - Chrome:  full stack trace with line and column numbers
+ *   - Safari:  line and column number for the top frame only; some frames
+ *              may be missing, and column number is not guaranteed
+ *   - IE:      line and column number for the top frame only; some frames
+ *              may be missing, and column number is not guaranteed
+ *
+ * In theory, TraceKit should work on all of the following versions:
+ *   - IE5.5+ (only 8.0 tested)
+ *   - Firefox 0.9+ (only 3.5+ tested)
+ *   - Opera 7+ (only 10.50 tested; versions 9 and earlier may require
+ *     Exceptions Have Stacktrace to be enabled in opera:config)
+ *   - Safari 3+ (only 4+ tested)
+ *   - Chrome 1+ (only 5+ tested)
+ *   - Konqueror 3.5+ (untested)
+ *
+ * Requires TraceKit.computeStackTrace.
+ *
+ * Tries to catch all unhandled exceptions and report them to the
+ * subscribed handlers. Please note that TraceKit.report will rethrow the
+ * exception. This is REQUIRED in order to get a useful stack trace in IE.
+ * If the exception does not reach the top of the browser, you will only
+ * get a stack trace from the point where TraceKit.report was called.
+ *
+ * Handlers receive a stackInfo object as described in the
+ * TraceKit.computeStackTrace docs.
+ */
+TraceKit.report = (function reportModuleWrapper() {
+    var handlers = [],
+        lastArgs = null,
+        lastException = null,
+        lastExceptionStack = null;
+
+    /**
+     * Add a crash handler.
+     * @param {Function} handler
+     */
+    function subscribe(handler) {
+        installGlobalHandler();
+        handlers.push(handler);
+    }
+
+    /**
+     * Remove a crash handler.
+     * @param {Function} handler
+     */
+    function unsubscribe(handler) {
+        for (var i = handlers.length - 1; i >= 0; --i) {
+            if (handlers[i] === handler) {
+                handlers.splice(i, 1);
+            }
+        }
+    }
+
+    /**
+     * Remove all crash handlers.
+     */
+    function unsubscribeAll() {
+        uninstallGlobalHandler();
+        handlers = [];
+    }
+
+    /**
+     * Dispatch stack information to all handlers.
+     * @param {Object.<string, *>} stack
+     */
+    function notifyHandlers(stack, isWindowError) {
+        var exception = null;
+        if (isWindowError && !TraceKit.collectWindowErrors) {
+          return;
+        }
+        for (var i in handlers) {
+            if (hasKey(handlers, i)) {
+                try {
+                    handlers[i].apply(null, [stack].concat(_slice.call(arguments, 2)));
+                } catch (inner) {
+                    exception = inner;
+                }
+            }
+        }
+
+        if (exception) {
+            throw exception;
+        }
+    }
+
+    var _oldOnerrorHandler, _onErrorHandlerInstalled;
+
+    /**
+     * Ensures all global unhandled exceptions are recorded.
+     * Supported by Gecko and IE.
+     * @param {string} message Error message.
+     * @param {string} url URL of script that generated the exception.
+     * @param {(number|string)} lineNo The line number at which the error
+     * occurred.
+     * @param {?(number|string)} colNo The column number at which the error
+     * occurred.
+     * @param {?Error} ex The actual Error object.
+     */
+    function traceKitWindowOnError(message, url, lineNo, colNo, ex) {
+        var stack = null;
+
+        if (lastExceptionStack) {
+            TraceKit.computeStackTrace.augmentStackTraceWithInitialElement(lastExceptionStack, url, lineNo, message);
+            processLastException();
+        } else if (ex) {
+            // New chrome and blink send along a real error object
+            // Let's just report that like a normal error.
+            // See: https://mikewest.org/2013/08/debugging-runtime-errors-with-window-onerror
+            stack = TraceKit.computeStackTrace(ex);
+            notifyHandlers(stack, true);
+        } else {
+            var location = {
+                'url': url,
+                'line': lineNo,
+                'column': colNo
+            };
+            location.func = TraceKit.computeStackTrace.guessFunctionName(location.url, location.line);
+            location.context = TraceKit.computeStackTrace.gatherContext(location.url, location.line);
+
+            var name = undefined;
+            var msg = message; // must be new var or will modify original `arguments`
+            var groups;
+            if (isString(message)) {
+                var groups = message.match(ERROR_TYPES_RE);
+                if (groups) {
+                    name = groups[1];
+                    msg = groups[2];
+                }
+            }
+
+            stack = {
+                'name': name,
+                'message': msg,
+                'url': getLocationHref(),
+                'stack': [location]
+            };
+            notifyHandlers(stack, true);
+        }
+
+        if (_oldOnerrorHandler) {
+            return _oldOnerrorHandler.apply(this, arguments);
+        }
+
+        return false;
+    }
+
+    function installGlobalHandler ()
+    {
+        if (_onErrorHandlerInstalled) {
+            return;
+        }
+        _oldOnerrorHandler = window.onerror;
+        window.onerror = traceKitWindowOnError;
+        _onErrorHandlerInstalled = true;
+    }
+
+    function uninstallGlobalHandler ()
+    {
+        if (!_onErrorHandlerInstalled) {
+            return;
+        }
+        window.onerror = _oldOnerrorHandler;
+        _onErrorHandlerInstalled = false;
+        _oldOnerrorHandler = undefined;
+    }
+
+    function processLastException() {
+        var _lastExceptionStack = lastExceptionStack,
+            _lastArgs = lastArgs;
+        lastArgs = null;
+        lastExceptionStack = null;
+        lastException = null;
+        notifyHandlers.apply(null, [_lastExceptionStack, false].concat(_lastArgs));
+    }
+
+    /**
+     * Reports an unhandled Error to TraceKit.
+     * @param {Error} ex
+     * @param {?boolean} rethrow If false, do not re-throw the exception.
+     * Only used for window.onerror to not cause an infinite loop of
+     * rethrowing.
+     */
+    function report(ex, rethrow) {
+        var args = _slice.call(arguments, 1);
+        if (lastExceptionStack) {
+            if (lastException === ex) {
+                return; // already caught by an inner catch block, ignore
+            } else {
+              processLastException();
+            }
+        }
+
+        var stack = TraceKit.computeStackTrace(ex);
+        lastExceptionStack = stack;
+        lastException = ex;
+        lastArgs = args;
+
+        // If the stack trace is incomplete, wait for 2 seconds for
+        // slow slow IE to see if onerror occurs or not before reporting
+        // this exception; otherwise, we will end up with an incomplete
+        // stack trace
+        window.setTimeout(function () {
+            if (lastException === ex) {
+                processLastException();
+            }
+        }, (stack.incomplete ? 2000 : 0));
+
+        if (rethrow !== false) {
+            throw ex; // re-throw to propagate to the top level (and cause window.onerror)
+        }
+    }
+
+    report.subscribe = subscribe;
+    report.unsubscribe = unsubscribe;
+    report.uninstall = unsubscribeAll;
+    return report;
+}());
+
+/**
+ * TraceKit.computeStackTrace: cross-browser stack traces in JavaScript
+ *
+ * Syntax:
+ *   s = TraceKit.computeStackTrace(exception) // consider using TraceKit.report instead (see below)
+ * Returns:
+ *   s.name              - exception name
+ *   s.message           - exception message
+ *   s.stack[i].url      - JavaScript or HTML file URL
+ *   s.stack[i].func     - function name, or empty for anonymous functions (if guessing did not work)
+ *   s.stack[i].args     - arguments passed to the function, if known
+ *   s.stack[i].line     - line number, if known
+ *   s.stack[i].column   - column number, if known
+ *   s.stack[i].context  - an array of source code lines; the middle element corresponds to the correct line#
+ *
+ * Supports:
+ *   - Firefox:  full stack trace with line numbers and unreliable column
+ *               number on top frame
+ *   - Opera 10: full stack trace with line and column numbers
+ *   - Opera 9-: full stack trace with line numbers
+ *   - Chrome:   full stack trace with line and column numbers
+ *   - Safari:   line and column number for the topmost stacktrace element
+ *               only
+ *   - IE:       no line numbers whatsoever
+ *
+ * Tries to guess names of anonymous functions by looking for assignments
+ * in the source code. In IE and Safari, we have to guess source file names
+ * by searching for function bodies inside all page scripts. This will not
+ * work for scripts that are loaded cross-domain.
+ * Here be dragons: some function names may be guessed incorrectly, and
+ * duplicate functions may be mismatched.
+ *
+ * TraceKit.computeStackTrace should only be used for tracing purposes.
+ * Logging of unhandled exceptions should be done with TraceKit.report,
+ * which builds on top of TraceKit.computeStackTrace and provides better
+ * IE support by utilizing the window.onerror event to retrieve information
+ * about the top of the stack.
+ *
+ * Note: In IE and Safari, no stack trace is recorded on the Error object,
+ * so computeStackTrace instead walks its *own* chain of callers.
+ * This means that:
+ *  * in Safari, some methods may be missing from the stack trace;
+ *  * in IE, the topmost function in the stack trace will always be the
+ *    caller of computeStackTrace.
+ *
+ * This is okay for tracing (because you are likely to be calling
+ * computeStackTrace from the function you want to be the topmost element
+ * of the stack trace anyway), but not okay for logging unhandled
+ * exceptions (because your catch block will likely be far away from the
+ * inner function that actually caused the exception).
+ *
+ */
+TraceKit.computeStackTrace = (function computeStackTraceWrapper() {
+    var sourceCache = {};
+
+    /**
+     * Attempts to retrieve source code via XMLHttpRequest, which is used
+     * to look up anonymous function names.
+     * @param {string} url URL of source code.
+     * @return {string} Source contents.
+     */
+    function loadSource(url) {
+        if (!TraceKit.remoteFetching) { //Only attempt request if remoteFetching is on.
+            return '';
+        }
+        try {
+            var getXHR = function() {
+                try {
+                    return new window.XMLHttpRequest();
+                } catch (e) {
+                    // explicitly bubble up the exception if not found
+                    return new window.ActiveXObject('Microsoft.XMLHTTP');
+                }
+            };
+
+            var request = getXHR();
+            request.open('GET', url, false);
+            request.send('');
+            return request.responseText;
+        } catch (e) {
+            return '';
+        }
+    }
+
+    /**
+     * Retrieves source code from the source code cache.
+     * @param {string} url URL of source code.
+     * @return {Array.<string>} Source contents.
+     */
+    function getSource(url) {
+        if (!isString(url)) return [];
+        if (!hasKey(sourceCache, url)) {
+            // URL needs to be able to fetched within the acceptable domain.  Otherwise,
+            // cross-domain errors will be triggered.
+            var source = '';
+            var domain = '';
+            try { domain = document.domain; } catch (e) {}
+            if (url.indexOf(domain) !== -1) {
+                source = loadSource(url);
+            }
+            sourceCache[url] = source ? source.split('\n') : [];
+        }
+
+        return sourceCache[url];
+    }
+
+    /**
+     * Tries to use an externally loaded copy of source code to determine
+     * the name of a function by looking at the name of the variable it was
+     * assigned to, if any.
+     * @param {string} url URL of source code.
+     * @param {(string|number)} lineNo Line number in source code.
+     * @return {string} The function name, if discoverable.
+     */
+    function guessFunctionName(url, lineNo) {
+        var reFunctionArgNames = /function ([^(]*)\(([^)]*)\)/,
+            reGuessFunction = /['"]?([0-9A-Za-z$_]+)['"]?\s*[:=]\s*(function|eval|new Function)/,
+            line = '',
+            maxLines = 10,
+            source = getSource(url),
+            m;
+
+        if (!source.length) {
+            return UNKNOWN_FUNCTION;
+        }
+
+        // Walk backwards from the first line in the function until we find the line which
+        // matches the pattern above, which is the function definition
+        for (var i = 0; i < maxLines; ++i) {
+            line = source[lineNo - i] + line;
+
+            if (!isUndefined(line)) {
+                if ((m = reGuessFunction.exec(line))) {
+                    return m[1];
+                } else if ((m = reFunctionArgNames.exec(line))) {
+                    return m[1];
+                }
+            }
+        }
+
+        return UNKNOWN_FUNCTION;
+    }
+
+    /**
+     * Retrieves the surrounding lines from where an exception occurred.
+     * @param {string} url URL of source code.
+     * @param {(string|number)} line Line number in source code to centre
+     * around for context.
+     * @return {?Array.<string>} Lines of source code.
+     */
+    function gatherContext(url, line) {
+        var source = getSource(url);
+
+        if (!source.length) {
+            return null;
+        }
+
+        var context = [],
+            // linesBefore & linesAfter are inclusive with the offending line.
+            // if linesOfContext is even, there will be one extra line
+            //   *before* the offending line.
+            linesBefore = Math.floor(TraceKit.linesOfContext / 2),
+            // Add one extra line if linesOfContext is odd
+            linesAfter = linesBefore + (TraceKit.linesOfContext % 2),
+            start = Math.max(0, line - linesBefore - 1),
+            end = Math.min(source.length, line + linesAfter - 1);
+
+        line -= 1; // convert to 0-based index
+
+        for (var i = start; i < end; ++i) {
+            if (!isUndefined(source[i])) {
+                context.push(source[i]);
+            }
+        }
+
+        return context.length > 0 ? context : null;
+    }
+
+    /**
+     * Escapes special characters, except for whitespace, in a string to be
+     * used inside a regular expression as a string literal.
+     * @param {string} text The string.
+     * @return {string} The escaped string literal.
+     */
+    function escapeRegExp(text) {
+        return text.replace(/[\-\[\]{}()*+?.,\\\^$|#]/g, '\\$&');
+    }
+
+    /**
+     * Escapes special characters in a string to be used inside a regular
+     * expression as a string literal. Also ensures that HTML entities will
+     * be matched the same as their literal friends.
+     * @param {string} body The string.
+     * @return {string} The escaped string.
+     */
+    function escapeCodeAsRegExpForMatchingInsideHTML(body) {
+        return escapeRegExp(body).replace('<', '(?:<|&lt;)').replace('>', '(?:>|&gt;)').replace('&', '(?:&|&amp;)').replace('"', '(?:"|&quot;)').replace(/\s+/g, '\\s+');
+    }
+
+    /**
+     * Determines where a code fragment occurs in the source code.
+     * @param {RegExp} re The function definition.
+     * @param {Array.<string>} urls A list of URLs to search.
+     * @return {?Object.<string, (string|number)>} An object containing
+     * the url, line, and column number of the defined function.
+     */
+    function findSourceInUrls(re, urls) {
+        var source, m;
+        for (var i = 0, j = urls.length; i < j; ++i) {
+            // console.log('searching', urls[i]);
+            if ((source = getSource(urls[i])).length) {
+                source = source.join('\n');
+                if ((m = re.exec(source))) {
+                    // console.log('Found function in ' + urls[i]);
+
+                    return {
+                        'url': urls[i],
+                        'line': source.substring(0, m.index).split('\n').length,
+                        'column': m.index - source.lastIndexOf('\n', m.index) - 1
+                    };
+                }
+            }
+        }
+
+        // console.log('no match');
+
+        return null;
+    }
+
+    /**
+     * Determines at which column a code fragment occurs on a line of the
+     * source code.
+     * @param {string} fragment The code fragment.
+     * @param {string} url The URL to search.
+     * @param {(string|number)} line The line number to examine.
+     * @return {?number} The column number.
+     */
+    function findSourceInLine(fragment, url, line) {
+        var source = getSource(url),
+            re = new RegExp('\\b' + escapeRegExp(fragment) + '\\b'),
+            m;
+
+        line -= 1;
+
+        if (source && source.length > line && (m = re.exec(source[line]))) {
+            return m.index;
+        }
+
+        return null;
+    }
+
+    /**
+     * Determines where a function was defined within the source code.
+     * @param {(Function|string)} func A function reference or serialized
+     * function definition.
+     * @return {?Object.<string, (string|number)>} An object containing
+     * the url, line, and column number of the defined function.
+     */
+    function findSourceByFunctionBody(func) {
+        if (typeof document === 'undefined')
+            return;
+
+        var urls = [window.location.href],
+            scripts = document.getElementsByTagName('script'),
+            body,
+            code = '' + func,
+            codeRE = /^function(?:\s+([\w$]+))?\s*\(([\w\s,]*)\)\s*\{\s*(\S[\s\S]*\S)\s*\}\s*$/,
+            eventRE = /^function on([\w$]+)\s*\(event\)\s*\{\s*(\S[\s\S]*\S)\s*\}\s*$/,
+            re,
+            parts,
+            result;
+
+        for (var i = 0; i < scripts.length; ++i) {
+            var script = scripts[i];
+            if (script.src) {
+                urls.push(script.src);
+            }
+        }
+
+        if (!(parts = codeRE.exec(code))) {
+            re = new RegExp(escapeRegExp(code).replace(/\s+/g, '\\s+'));
+        }
+
+        // not sure if this is really necessary, but I don’t have a test
+        // corpus large enough to confirm that and it was in the original.
+        else {
+            var name = parts[1] ? '\\s+' + parts[1] : '',
+                args = parts[2].split(',').join('\\s*,\\s*');
+
+            body = escapeRegExp(parts[3]).replace(/;$/, ';?'); // semicolon is inserted if the function ends with a comment.replace(/\s+/g, '\\s+');
+            re = new RegExp('function' + name + '\\s*\\(\\s*' + args + '\\s*\\)\\s*{\\s*' + body + '\\s*}');
+        }
+
+        // look for a normal function definition
+        if ((result = findSourceInUrls(re, urls))) {
+            return result;
+        }
+
+        // look for an old-school event handler function
+        if ((parts = eventRE.exec(code))) {
+            var event = parts[1];
+            body = escapeCodeAsRegExpForMatchingInsideHTML(parts[2]);
+
+            // look for a function defined in HTML as an onXXX handler
+            re = new RegExp('on' + event + '=[\\\'"]\\s*' + body + '\\s*[\\\'"]', 'i');
+
+            if ((result = findSourceInUrls(re, urls[0]))) {
+                return result;
+            }
+
+            // look for ???
+            re = new RegExp(body);
+
+            if ((result = findSourceInUrls(re, urls))) {
+                return result;
+            }
+        }
+
+        return null;
+    }
+
+    // Contents of Exception in various browsers.
+    //
+    // SAFARI:
+    // ex.message = Can't find variable: qq
+    // ex.line = 59
+    // ex.sourceId = 580238192
+    // ex.sourceURL = http://...
+    // ex.expressionBeginOffset = 96
+    // ex.expressionCaretOffset = 98
+    // ex.expressionEndOffset = 98
+    // ex.name = ReferenceError
+    //
+    // FIREFOX:
+    // ex.message = qq is not defined
+    // ex.fileName = http://...
+    // ex.lineNumber = 59
+    // ex.columnNumber = 69
+    // ex.stack = ...stack trace... (see the example below)
+    // ex.name = ReferenceError
+    //
+    // CHROME:
+    // ex.message = qq is not defined
+    // ex.name = ReferenceError
+    // ex.type = not_defined
+    // ex.arguments = ['aa']
+    // ex.stack = ...stack trace...
+    //
+    // INTERNET EXPLORER:
+    // ex.message = ...
+    // ex.name = ReferenceError
+    //
+    // OPERA:
+    // ex.message = ...message... (see the example below)
+    // ex.name = ReferenceError
+    // ex.opera#sourceloc = 11  (pretty much useless, duplicates the info in ex.message)
+    // ex.stacktrace = n/a; see 'opera:config#UserPrefs|Exceptions Have Stacktrace'
+
+    /**
+     * Computes stack trace information from the stack property.
+     * Chrome and Gecko use this property.
+     * @param {Error} ex
+     * @return {?Object.<string, *>} Stack trace information.
+     */
+    function computeStackTraceFromStackProp(ex) {
+        if (isUndefined(ex.stack) || !ex.stack) return;
+
+        var chrome = /^\s*at (.*?) ?\(((?:file|https?|blob|chrome-extension|native|eval|<anonymous>).*?)(?::(\d+))?(?::(\d+))?\)?\s*$/i,
+            gecko = /^\s*(.*?)(?:\((.*?)\))?(?:^|@)((?:file|https?|blob|chrome|\[native).*?)(?::(\d+))?(?::(\d+))?\s*$/i,
+            winjs = /^\s*at (?:((?:\[object object\])?.+) )?\(?((?:ms-appx|https?|blob):.*?):(\d+)(?::(\d+))?\)?\s*$/i,
+            lines = ex.stack.split('\n'),
+            stack = [],
+            parts,
+            element,
+            reference = /^(.*) is undefined$/.exec(ex.message);
+
+        for (var i = 0, j = lines.length; i < j; ++i) {
+            if ((parts = chrome.exec(lines[i]))) {
+                var isNative = parts[2] && parts[2].indexOf('native') !== -1;
+                element = {
+                    'url': !isNative ? parts[2] : null,
+                    'func': parts[1] || UNKNOWN_FUNCTION,
+                    'args': isNative ? [parts[2]] : [],
+                    'line': parts[3] ? +parts[3] : null,
+                    'column': parts[4] ? +parts[4] : null
+                };
+            } else if ( parts = winjs.exec(lines[i]) ) {
+                element = {
+                    'url': parts[2],
+                    'func': parts[1] || UNKNOWN_FUNCTION,
+                    'args': [],
+                    'line': +parts[3],
+                    'column': parts[4] ? +parts[4] : null
+                };
+            } else if ((parts = gecko.exec(lines[i]))) {
+                element = {
+                    'url': parts[3],
+                    'func': parts[1] || UNKNOWN_FUNCTION,
+                    'args': parts[2] ? parts[2].split(',') : [],
+                    'line': parts[4] ? +parts[4] : null,
+                    'column': parts[5] ? +parts[5] : null
+                };
+            } else {
+                continue;
+            }
+
+            if (!element.func && element.line) {
+                element.func = guessFunctionName(element.url, element.line);
+            }
+
+            if (element.line) {
+                element.context = gatherContext(element.url, element.line);
+            }
+
+            stack.push(element);
+        }
+
+        if (!stack.length) {
+            return null;
+        }
+
+        if (stack[0].line && !stack[0].column && reference) {
+            stack[0].column = findSourceInLine(reference[1], stack[0].url, stack[0].line);
+        } else if (!stack[0].column && !isUndefined(ex.columnNumber)) {
+            // FireFox uses this awesome columnNumber property for its top frame
+            // Also note, Firefox's column number is 0-based and everything else expects 1-based,
+            // so adding 1
+            stack[0].column = ex.columnNumber + 1;
+        }
+
+        return {
+            'name': ex.name,
+            'message': ex.message,
+            'url': getLocationHref(),
+            'stack': stack
+        };
+    }
+
+    /**
+     * Computes stack trace information from the stacktrace property.
+     * Opera 10 uses this property.
+     * @param {Error} ex
+     * @return {?Object.<string, *>} Stack trace information.
+     */
+    function computeStackTraceFromStacktraceProp(ex) {
+        // Access and store the stacktrace property before doing ANYTHING
+        // else to it because Opera is not very good at providing it
+        // reliably in other circumstances.
+        var stacktrace = ex.stacktrace;
+        if (isUndefined(ex.stacktrace) || !ex.stacktrace) return;
+
+        var opera10Regex = / line (\d+).*script (?:in )?(\S+)(?:: in function (\S+))?$/i,
+          opera11Regex = / line (\d+), column (\d+)\s*(?:in (?:<anonymous function: ([^>]+)>|([^\)]+))\((.*)\))? in (.*):\s*$/i,
+          lines = stacktrace.split('\n'),
+          stack = [],
+          parts;
+
+        for (var line = 0; line < lines.length; line += 2) {
+            var element = null;
+            if ((parts = opera10Regex.exec(lines[line]))) {
+                element = {
+                    'url': parts[2],
+                    'line': +parts[1],
+                    'column': null,
+                    'func': parts[3],
+                    'args':[]
+                };
+            } else if ((parts = opera11Regex.exec(lines[line]))) {
+                element = {
+                    'url': parts[6],
+                    'line': +parts[1],
+                    'column': +parts[2],
+                    'func': parts[3] || parts[4],
+                    'args': parts[5] ? parts[5].split(',') : []
+                };
+            }
+
+            if (element) {
+                if (!element.func && element.line) {
+                    element.func = guessFunctionName(element.url, element.line);
+                }
+                if (element.line) {
+                    try {
+                        element.context = gatherContext(element.url, element.line);
+                    } catch (exc) {}
+                }
+
+                if (!element.context) {
+                    element.context = [lines[line + 1]];
+                }
+
+                stack.push(element);
+            }
+        }
+
+        if (!stack.length) {
+            return null;
+        }
+
+        return {
+            'name': ex.name,
+            'message': ex.message,
+            'url': getLocationHref(),
+            'stack': stack
+        };
+    }
+
+    /**
+     * NOT TESTED.
+     * Computes stack trace information from an error message that includes
+     * the stack trace.
+     * Opera 9 and earlier use this method if the option to show stack
+     * traces is turned on in opera:config.
+     * @param {Error} ex
+     * @return {?Object.<string, *>} Stack information.
+     */
+    function computeStackTraceFromOperaMultiLineMessage(ex) {
+        // Opera includes a stack trace into the exception message. An example is:
+        //
+        // Statement on line 3: Undefined variable: undefinedFunc
+        // Backtrace:
+        //   Line 3 of linked script file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.js: In function zzz
+        //         undefinedFunc(a);
+        //   Line 7 of inline#1 script in file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.html: In function yyy
+        //           zzz(x, y, z);
+        //   Line 3 of inline#1 script in file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.html: In function xxx
+        //           yyy(a, a, a);
+        //   Line 1 of function script
+        //     try { xxx('hi'); return false; } catch(ex) { TraceKit.report(ex); }
+        //   ...
+
+        var lines = ex.message.split('\n');
+        if (lines.length < 4) {
+            return null;
+        }
+
+        var lineRE1 = /^\s*Line (\d+) of linked script ((?:file|https?|blob)\S+)(?:: in function (\S+))?\s*$/i,
+            lineRE2 = /^\s*Line (\d+) of inline#(\d+) script in ((?:file|https?|blob)\S+)(?:: in function (\S+))?\s*$/i,
+            lineRE3 = /^\s*Line (\d+) of function script\s*$/i,
+            stack = [],
+            scripts = document.getElementsByTagName('script'),
+            inlineScriptBlocks = [],
+            parts;
+
+        for (var s in scripts) {
+            if (hasKey(scripts, s) && !scripts[s].src) {
+                inlineScriptBlocks.push(scripts[s]);
+            }
+        }
+
+        for (var line = 2; line < lines.length; line += 2) {
+            var item = null;
+            if ((parts = lineRE1.exec(lines[line]))) {
+                item = {
+                    'url': parts[2],
+                    'func': parts[3],
+                    'args': [],
+                    'line': +parts[1],
+                    'column': null
+                };
+            } else if ((parts = lineRE2.exec(lines[line]))) {
+                item = {
+                    'url': parts[3],
+                    'func': parts[4],
+                    'args': [],
+                    'line': +parts[1],
+                    'column': null // TODO: Check to see if inline#1 (+parts[2]) points to the script number or column number.
+                };
+                var relativeLine = (+parts[1]); // relative to the start of the <SCRIPT> block
+                var script = inlineScriptBlocks[parts[2] - 1];
+                if (script) {
+                    var source = getSource(item.url);
+                    if (source) {
+                        source = source.join('\n');
+                        var pos = source.indexOf(script.innerText);
+                        if (pos >= 0) {
+                            item.line = relativeLine + source.substring(0, pos).split('\n').length;
+                        }
+                    }
+                }
+            } else if ((parts = lineRE3.exec(lines[line]))) {
+                var url = window.location.href.replace(/#.*$/, '');
+                var re = new RegExp(escapeCodeAsRegExpForMatchingInsideHTML(lines[line + 1]));
+                var src = findSourceInUrls(re, [url]);
+                item = {
+                    'url': url,
+                    'func': '',
+                    'args': [],
+                    'line': src ? src.line : parts[1],
+                    'column': null
+                };
+            }
+
+            if (item) {
+                if (!item.func) {
+                    item.func = guessFunctionName(item.url, item.line);
+                }
+                var context = gatherContext(item.url, item.line);
+                var midline = (context ? context[Math.floor(context.length / 2)] : null);
+                if (context && midline.replace(/^\s*/, '') === lines[line + 1].replace(/^\s*/, '')) {
+                    item.context = context;
+                } else {
+                    // if (context) alert("Context mismatch. Correct midline:\n" + lines[i+1] + "\n\nMidline:\n" + midline + "\n\nContext:\n" + context.join("\n") + "\n\nURL:\n" + item.url);
+                    item.context = [lines[line + 1]];
+                }
+                stack.push(item);
+            }
+        }
+
+        if (!stack.length) {
+            return null; // could not parse multiline exception message as Opera stack trace
+        }
+
+        return {
+            'name': ex.name,
+            'message': lines[0],
+            'url': getLocationHref(),
+            'stack': stack
+        };
+    }
+
+    /**
+     * Adds information about the first frame to incomplete stack traces.
+     * Safari and IE require this to get complete data on the first frame.
+     * @param {Object.<string, *>} stackInfo Stack trace information from
+     * one of the compute* methods.
+     * @param {string} url The URL of the script that caused an error.
+     * @param {(number|string)} lineNo The line number of the script that
+     * caused an error.
+     * @param {string=} message The error generated by the browser, which
+     * hopefully contains the name of the object that caused the error.
+     * @return {boolean} Whether or not the stack information was
+     * augmented.
+     */
+    function augmentStackTraceWithInitialElement(stackInfo, url, lineNo, message) {
+        var initial = {
+            'url': url,
+            'line': lineNo
+        };
+
+        if (initial.url && initial.line) {
+            stackInfo.incomplete = false;
+
+            if (!initial.func) {
+                initial.func = guessFunctionName(initial.url, initial.line);
+            }
+
+            if (!initial.context) {
+                initial.context = gatherContext(initial.url, initial.line);
+            }
+
+            var reference = / '([^']+)' /.exec(message);
+            if (reference) {
+                initial.column = findSourceInLine(reference[1], initial.url, initial.line);
+            }
+
+            if (stackInfo.stack.length > 0) {
+                if (stackInfo.stack[0].url === initial.url) {
+                    if (stackInfo.stack[0].line === initial.line) {
+                        return false; // already in stack trace
+                    } else if (!stackInfo.stack[0].line && stackInfo.stack[0].func === initial.func) {
+                        stackInfo.stack[0].line = initial.line;
+                        stackInfo.stack[0].context = initial.context;
+                        return false;
+                    }
+                }
+            }
+
+            stackInfo.stack.unshift(initial);
+            stackInfo.partial = true;
+            return true;
+        } else {
+            stackInfo.incomplete = true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Computes stack trace information by walking the arguments.caller
+     * chain at the time the exception occurred. This will cause earlier
+     * frames to be missed but is the only way to get any stack trace in
+     * Safari and IE. The top frame is restored by
+     * {@link augmentStackTraceWithInitialElement}.
+     * @param {Error} ex
+     * @return {?Object.<string, *>} Stack trace information.
+     */
+    function computeStackTraceByWalkingCallerChain(ex, depth) {
+        var functionName = /function\s+([_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*)?\s*\(/i,
+            stack = [],
+            funcs = {},
+            recursion = false,
+            parts,
+            item,
+            source;
+
+        for (var curr = computeStackTraceByWalkingCallerChain.caller; curr && !recursion; curr = curr.caller) {
+            if (curr === computeStackTrace || curr === TraceKit.report) {
+                // console.log('skipping internal function');
+                continue;
+            }
+
+            item = {
+                'url': null,
+                'func': UNKNOWN_FUNCTION,
+                'line': null,
+                'column': null
+            };
+
+            if (curr.name) {
+                item.func = curr.name;
+            } else if ((parts = functionName.exec(curr.toString()))) {
+                item.func = parts[1];
+            }
+
+            if (typeof item.func === 'undefined') {
+              try {
+                item.func = parts.input.substring(0, parts.input.indexOf('{'));
+              } catch (e) { }
+            }
+
+            if ((source = findSourceByFunctionBody(curr))) {
+                item.url = source.url;
+                item.line = source.line;
+
+                if (item.func === UNKNOWN_FUNCTION) {
+                    item.func = guessFunctionName(item.url, item.line);
+                }
+
+                var reference = / '([^']+)' /.exec(ex.message || ex.description);
+                if (reference) {
+                    item.column = findSourceInLine(reference[1], source.url, source.line);
+                }
+            }
+
+            if (funcs['' + curr]) {
+                recursion = true;
+            }else{
+                funcs['' + curr] = true;
+            }
+
+            stack.push(item);
+        }
+
+        if (depth) {
+            // console.log('depth is ' + depth);
+            // console.log('stack is ' + stack.length);
+            stack.splice(0, depth);
+        }
+
+        var result = {
+            'name': ex.name,
+            'message': ex.message,
+            'url': getLocationHref(),
+            'stack': stack
+        };
+        augmentStackTraceWithInitialElement(result, ex.sourceURL || ex.fileName, ex.line || ex.lineNumber, ex.message || ex.description);
+        return result;
+    }
+
+    /**
+     * Computes a stack trace for an exception.
+     * @param {Error} ex
+     * @param {(string|number)=} depth
+     */
+    function computeStackTrace(ex, depth) {
+        var stack = null;
+        depth = (depth == null ? 0 : +depth);
+
+        try {
+            // This must be tried first because Opera 10 *destroys*
+            // its stacktrace property if you try to access the stack
+            // property first!!
+            stack = computeStackTraceFromStacktraceProp(ex);
+            if (stack) {
+                return stack;
+            }
+        } catch (e) {
+            if (TraceKit.debug) {
+                throw e;
+            }
+        }
+
+        try {
+            stack = computeStackTraceFromStackProp(ex);
+            if (stack) {
+                return stack;
+            }
+        } catch (e) {
+            if (TraceKit.debug) {
+                throw e;
+            }
+        }
+
+        try {
+            stack = computeStackTraceFromOperaMultiLineMessage(ex);
+            if (stack) {
+                return stack;
+            }
+        } catch (e) {
+            if (TraceKit.debug) {
+                throw e;
+            }
+        }
+
+        try {
+            stack = computeStackTraceByWalkingCallerChain(ex, depth + 1);
+            if (stack) {
+                return stack;
+            }
+        } catch (e) {
+            if (TraceKit.debug) {
+                throw e;
+            }
+        }
+
+        return {
+            'name': ex.name,
+            'message': ex.message,
+            'url': getLocationHref()
+        };
+    }
+
+    computeStackTrace.augmentStackTraceWithInitialElement = augmentStackTraceWithInitialElement;
+    computeStackTrace.computeStackTraceFromStackProp = computeStackTraceFromStackProp;
+    computeStackTrace.guessFunctionName = guessFunctionName;
+    computeStackTrace.gatherContext = gatherContext;
+
+    return computeStackTrace;
+}());
+
+module.exports = TraceKit;
+
+},{"4":4}]},{},[3])(3)
+});
\ No newline at end of file