add account merge error

services/web/app/coffee/Features/Errors/ErrorController.coffee

@@ -13,6 +13,11 @@ module.exports = ErrorController =
 		res.render 'general/500',
 			title: "Server Error"
 
+	accountMergeError: (req, res)->
+		res.status(500)
+		res.render 'general/account-merge-error',
+			title: "Account Access Error"
+
 	handleError: (error, req, res, next) ->
 		user = AuthenticationController.getSessionUser(req)
 		if error?.code is 'EBADCSRFTOKEN'
@@ -33,6 +38,9 @@ module.exports = ErrorController =
 			logger.warn {err: error, url: req.url}, "invalid name error"
 			res.status(400)
 			res.send(error.message)
+		else if error instanceof Errors.AccountMergeError
+			logger.error err: error, "account merge error"
+			ErrorController.accountMergeError req, res
 		else
 			logger.error err: error, url:req.url, method:req.method, user:user, "error passed to top level next middlewear"
 			ErrorController.serverError req, res

services/web/app/coffee/Features/Errors/Errors.coffee

@@ -89,6 +89,13 @@ InvalidError = (message) ->
 	return error
 InvalidError.prototype.__proto__ = Error.prototype
 
+AccountMergeError = (message) ->
+	error = new Error(message)
+	error.name = "AccountMergeError"
+	error.__proto__ = AccountMergeError.prototype
+	return error
+AccountMergeError.prototype.__proto__ = Error.prototype
+
 module.exports = Errors =
 	NotFoundError: NotFoundError
 	ServiceNotConfiguredError: ServiceNotConfiguredError
@@ -103,3 +110,4 @@ module.exports = Errors =
 	UnconfirmedEmailError: UnconfirmedEmailError
 	EmailExistsError: EmailExistsError
 	InvalidError: InvalidError
+	AccountMergeError: AccountMergeError

services/web/app/views/general/account-merge-error.pug

@@ -0,0 +1,11 @@
+extends ../layout
+
+block content
+	.content.content-alt
+		.container
+			.row
+				.col-md-6.col-md-offset-3
+					.card
+						.page-header
+							h1 Account Access Error
+						p.text-danger Sorry, an error occurred accessing your account. Please #[a(href="" ng-controller="ContactModal" ng-click="contactUsModal()") contact support] for assistance.