Merged the bug fix which I did too.

app/assets/javascripts/workers/worker_world.js

@@ -82,6 +82,10 @@ self.transferableSupported = function transferableSupported() {
 
 var World = self.require('lib/world/world');
 var GoalManager = self.require('lib/world/GoalManager');
+
+Aether.addGlobal('Vector', require('lib/world/vector'));
+Aether.addGlobal('_', _);
+
 var serializedClasses = {
     "Thang": self.require('lib/world/thang'),
     "Vector": self.require('lib/world/vector'),
@@ -354,7 +358,6 @@ self.debugAbort = function () {
     self.postMessage({type: 'debugAbort'});
 };
 
-
 self.runWorld = function runWorld(args) {
   self.postedErrors = {};
   self.t0 = new Date();
@@ -408,11 +411,11 @@ self.onWorldLoaded = function onWorldLoaded() {
 };
 
 self.onWorldError = function onWorldError(error) {
-  if(error instanceof Aether.problems.UserCodeProblem) {
-    if(!self.postedErrors[error.key]) {
-      var problem = error.serialize();
-      self.postMessage({type: 'user-code-problem', problem: problem});
-      self.postedErrors[error.key] = problem;
+  if(error.isUserCodeProblem) {
+    var errorKey = error.userInfo.key;
+    if(!errorKey || !self.postedErrors[errorKey]) {
+      self.postMessage({type: 'user-code-problem', problem: error});
+      self.postedErrors[errorKey] = error;
     }
   }
   else {

app/lib/God.coffee

@@ -113,7 +113,7 @@ module.exports = class God
 
   angelUserCodeProblem: (angel, problem) ->
     return if @dead
-    #console.log "UserCodeProblem:", '"' + problem.message + '"', "for", problem.userInfo.thangID, "-", problem.userInfo.methodName, 'at line', problem.ranges?[0][0][0], 'column', problem.ranges?[0][0][1]
+    #console.log "UserCodeProblem:", '"' + problem.message + '"', "for", problem.userInfo.thangID, "-", problem.userInfo.methodName, 'at', problem.range?[0]
     Backbone.Mediator.publish 'god:user-code-problem', problem: problem
 
   createWorld: (@spells) ->

app/lib/auth.coffee

@@ -16,7 +16,7 @@ init = ->
 module.exports.createUser = (userObject, failure=backboneFailure, nextURL=null) ->
   user = new User(userObject)
   user.save({}, {
-    error: (model,jqxhr,options) -> 
+    error: (model,jqxhr,options) ->
       error = parseServerError(jqxhr.responseText)
       property = error.property if error.property
       if jqxhr.status is 409 and property is 'name'
@@ -26,12 +26,12 @@ module.exports.createUser = (userObject, failure=backboneFailure, nextURL=null)
         genericFailure(jqxhr)
     success: -> if nextURL then window.location.href = nextURL else window.location.reload()
   })
-  
+
 module.exports.createUserWithoutReload = (userObject, failure=backboneFailure) ->
   user = new User(userObject)
   user.save({}, {
     error: failure
-    success: -> 
+    success: ->
       Backbone.Mediator.publish("created-user-without-reload")
   })
 

app/lib/simulator/Simulator.coffee

@@ -4,6 +4,9 @@ LevelLoader = require 'lib/LevelLoader'
 GoalManager = require 'lib/world/GoalManager'
 God = require 'lib/Buddha'
 
+Aether.addGlobal 'Vector', require 'lib/world/vector'
+Aether.addGlobal '_', _
+
 module.exports = class Simulator extends CocoClass
 
   constructor: (@options) ->
@@ -292,8 +295,8 @@ module.exports = class Simulator extends CocoClass
       functionName: methodName
       protectAPI: useProtectAPI
       includeFlow: false
-      requiresThis: true
       yieldConditionally: false
+      globals: ['Vector', '_']
       problems:
         jshint_W040: {level: "ignore"}
         jshint_W030: {level: "ignore"}  # aether_NoEffect instead

app/lib/world/systems/collision.coffee

@@ -32,7 +32,7 @@ module.exports.CollisionCategory = class CollisionCategory
     # "ground_and_air_<team>" units don't hit ground or air units on their team (so missiles don't hit same team)
     sameTeam = @superteamIndex and cat.superteamIndex is @superteamIndex
     return false if sameTeam and @ground and @air
-    
+
     # actually, "ground_and_air<team>" units don't hit any ground_and_air units (temp missile collision fix)
     return false if @ground and @air and cat.ground and cat.air
 

app/models/CocoModel.coffee

@@ -28,7 +28,7 @@ class CocoModel extends Backbone.Model
     clone = super()
     clone.set($.extend(true, {}, if withChanges then @attributes else @_revertAttributes))
     clone
-    
+
   onError: ->
     @loading = false
 
@@ -186,7 +186,7 @@ class CocoModel extends Backbone.Model
 
   watching: ->
     return me.id in (@get('watchers') or [])
-    
+
   populateI18N: (data, schema, path='') ->
     # TODO: Better schema/json walking
     sum = 0
@@ -195,7 +195,7 @@ class CocoModel extends Backbone.Model
     if schema.properties?.i18n and _.isPlainObject(data) and not data.i18n?
       data.i18n = {}
       sum += 1
-      
+
     if _.isPlainObject data
       for key, value of data
         numChanged = 0
@@ -203,10 +203,10 @@ class CocoModel extends Backbone.Model
         if numChanged and not path # should only do this for the root object
           @set key, value
         sum += numChanged
-          
+
     if schema.items and _.isArray data
       sum += @populateI18N(value, schema.items, path+'/'+index) for value, index in data
-    
+
     sum
 
   @getReferencedModel: (data, schema) ->
@@ -237,13 +237,13 @@ class CocoModel extends Backbone.Model
     model = new Model()
     model.url = makeUrlFunc(link)
     return model
-    
+
   setURL: (url) ->
     makeURLFunc = (u) -> -> u
     @url = makeURLFunc(url)
     @
-    
+
   getURL: ->
     return if _.isString @url then @url else @url()
-    
+
 module.exports = CocoModel

app/views/editor/level/component/edit.coffee

@@ -46,12 +46,12 @@ module.exports = class LevelComponentEditView extends View
     schema = _.cloneDeep LevelComponent.schema
     schema.properties = _.pick schema.properties, (value, key) => key in @editableSettings
     schema.required = _.intersection schema.required, @editableSettings
-    
+
     treemaOptions =
       supermodel: @supermodel
       schema: schema
       data: data
-      readOnly: me.get('anonymous')
+      readonly: me.get('anonymous')
       callbacks: {change: @onComponentSettingsEdited}
     @componentSettingsTreema = @$el.find('#edit-component-treema').treema treemaOptions
     @componentSettingsTreema.build()
@@ -93,7 +93,7 @@ module.exports = class LevelComponentEditView extends View
     session.setNewLineMode = 'unix'
     session.setUseSoftTabs true
     @editor.on('change', @onEditorChange)
-    
+
   onEditorChange: =>
     @levelComponent.set 'code', @editor.getValue()
     Backbone.Mediator.publish 'level-component-edited', levelComponent: @levelComponent
@@ -107,7 +107,7 @@ module.exports = class LevelComponentEditView extends View
     versionHistoryView = new VersionHistoryView {}, @levelComponent.id
     @openModalView versionHistoryView
     Backbone.Mediator.publish 'level:view-switched', e
-    
+
   startPatchingComponent: (e) ->
     @openModalView new SaveVersionModal({model:@levelComponent})
     Backbone.Mediator.publish 'level:view-switched', e
@@ -120,4 +120,3 @@ module.exports = class LevelComponentEditView extends View
   destroy: ->
     @editor?.destroy()
     super()
-

app/views/editor/level/settings_tab_view.coffee

@@ -3,6 +3,7 @@ template = require 'templates/editor/level/settings_tab'
 Level = require 'models/Level'
 Surface = require 'lib/surface/Surface'
 nodes = require './treema_nodes'
+{me} = require 'lib/auth'
 
 module.exports = class SettingsTabView extends View
   id: 'editor-level-settings-tab-view'

app/views/employers_view.coffee

@@ -50,7 +50,9 @@ module.exports = class EmployersView extends View
   renderCandidatesAndSetupScrolling: =>
     @render()
     $(".nano").nanoScroller()
-    if window.location.hash.length is 25
+    if window.history?.state?.lastViewedCandidateID
+      $(".nano").nanoScroller({scrollTo:$("#" + window.history.state.lastViewedCandidateID)})
+    else if window.location.hash.length is 25
       $(".nano").nanoScroller({scrollTo:$(window.location.hash)})
 
   sortTable: ->
@@ -175,8 +177,13 @@ module.exports = class EmployersView extends View
 
   onCandidateClicked: (e) ->
     id = $(e.target).closest('tr').data('candidate-id')
-    window.location.hash = id
     if id
+      if window.history
+        oldState = _.cloneDeep window.history.state ? {}
+        oldState["lastViewedCandidateID"] = id
+        window.history.replaceState(oldState,"")
+      else  
+        window.location.hash = id
       url = "/account/profile/#{id}"
       app.router.navigate url, {trigger: true}
     else

app/views/kinds/RootView.coffee

@@ -38,9 +38,9 @@ module.exports = class RootView extends CocoView
     # force the browser to scroll to the hash
     # also messes with the browser history, so perhaps come up with a better solution
     super()
-    hash = location.hash
-    location.hash = ''
-    location.hash = hash
+    #hash = location.hash
+    #location.hash = ''
+    #location.hash = hash
     @renderScrollbar()
     #@$('.antiscroll-wrap').antiscroll()  # not yet, buggy
 

app/views/play/level/tome/problem.coffee

@@ -17,9 +17,9 @@ module.exports = class Problem
     @removeMarkerRange()
 
   buildAnnotation: ->
-    return unless @aetherProblem.ranges
+    return unless @aetherProblem.range
     text = @aetherProblem.message.replace /^Line \d+: /, ''
-    start = @aetherProblem.ranges[0][0]
+    start = @aetherProblem.range[0]
     @annotation =
       row: start.row,
       column: start.col,
@@ -33,8 +33,8 @@ module.exports = class Problem
     $(@ace.container).append @alertView.el
 
   buildMarkerRange: ->
-    return unless @aetherProblem.ranges
-    [start, end] = @aetherProblem.ranges[0]
+    return unless @aetherProblem.range
+    [start, end] = @aetherProblem.range
     clazz = "problem-marker-#{@aetherProblem.level}"
     @markerRange = new Range start.row, start.col, end.row, end.col
     @markerRange.start = @ace.getSession().getDocument().createAnchor @markerRange.start

app/views/play/level/tome/spell.coffee

@@ -2,6 +2,9 @@ SpellView = require './spell_view'
 SpellListTabEntryView = require './spell_list_tab_entry_view'
 {me} = require 'lib/auth'
 
+Aether.addGlobal 'Vector', require 'lib/world/vector'
+Aether.addGlobal '_', _
+
 module.exports = class Spell
   loaded: false
   view: null
@@ -106,12 +109,12 @@ module.exports = class Spell
         jshint_W091: {level: "ignore"}  # eliminates more hoisting problems
         jshint_E043: {level: "ignore"}  # https://github.com/codecombat/codecombat/issues/813 -- since we can't actually tell JSHint to really ignore things
         jshint_Unknown: {level: "ignore"}  # E043 also triggers Unknown, so ignore that, too
-        aether_MissingThis: {level: (if thang.requiresThis then 'error' else 'warning')}
+        aether_MissingThis: {level: 'error'}
       language: aceConfig.language ? 'javascript'
       functionName: @name
       functionParameters: @parameters
       yieldConditionally: thang.plan?
-      requiresThis: thang.requiresThis
+      globals: ['Vector', '_']
       # TODO: Gridmancer doesn't currently work with protectAPI, so hack it off
       protectAPI: not (@skipProtectAPI or window.currentView?.level.get('name').match("Gridmancer")) and @permissions.readwrite.length > 0  # If anyone can write to this method, we must protect it.
       includeFlow: not @skipFlow and @canRead()

app/views/play/level/tome/spell_view.coffee

@@ -422,6 +422,7 @@ module.exports = class SpellView extends View
     @spellHasChanged = false
 
   onUserCodeProblem: (e) ->
+    console.log "onUserCodeProblem", e, e.problem.userInfo.methodName is @spell.name, spellThang = _.find @spell.thangs, (spellThang, thangID) -> thangID is e.problem.userInfo.thangID
     return @onInfiniteLoop e if e.problem.id is "runtime_InfiniteLoop"
     return unless e.problem.userInfo.methodName is @spell.name
     return unless spellThang = _.find @spell.thangs, (spellThang, thangID) -> thangID is e.problem.userInfo.thangID

bower.json

@@ -32,7 +32,7 @@
     "firepad": "~0.1.2",
     "marked": "~0.3.0",
     "moment": "~2.5.0",
-    "aether": "~0.1.18",
+    "aether": "~0.2.0",
     "underscore.string": "~2.3.3",
     "firebase": "~1.0.2",
     "catiline": "~2.9.3",

package.json

@@ -65,7 +65,7 @@
     "redis": "",
     "webworker-threads": "~0.4.11",
     "node-gyp": "~0.13.0",
-    "aether": "~0.1.18",
+    "aether": "~0.2.0",
     "JASON": "~0.1.3"
   },
   "devDependencies": {