Requesting an attribute as a relationship crashes servers

[Redsandro]

Requesting a recource with an include for a relationship that does not exist but is a known attribute for the resource throws an uncaught error (and crashes certain live websites)

Request:

http://<server>/api/resource/<some-id>/?include=<some-attribute>

Result:

/var/www/test/node_modules/mongodb/lib/utils.js:123
    process.nextTick(function() { throw err; });
                                  ^

TypeError: Cannot read property '__one' of null
    at iterate (/var/www/test/node_modules/jsonapi-server/lib/postProcessing/include.js:63:53)
    at includes.forEach.include (/var/www/test/node_modules/jsonapi-server/lib/postProcessing/include.js:96:5)
    at Array.forEach (<anonymous>)
    at Object.includePP._arrayToTree (/var/www/test/node_modules/jsonapi-server/lib/postProcessing/include.js:95:12)
    at Object.includePP.action [as _applyIncludes] (/var/www/test/node_modules/jsonapi-server/lib/postProcessing/include.js:19:13)
    at async.waterfall.next (/var/www/test/node_modules/jsonapi-server/lib/postProcess.js:17:25)
    at nextTask (/var/www/test/node_modules/async/dist/async.js:5310:14)
    at next (/var/www/test/node_modules/async/dist/async.js:5317:9)
    at /var/www/test/node_modules/async/dist/async.js:958:16
    at Object.filter.action [as _applyFilter] (/var/www/test/node_modules/jsonapi-server/lib/postProcessing/filter.js:12:24)
[nodemon] app crashed - waiting for file changes before starting...