TypeError: Cannot read property 'run' of undefined
    at Scan.run (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/combinator/accumulate.js:53:25)
    at Map.run (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/fusion/Map.js:58:22)
    at Scan.run (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/combinator/accumulate.js:54:24)
    at runSource (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/runSource.js:39:35)
    at /Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/runSource.js:31:5
    at withScheduler (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/runSource.js:30:10)
    at withDefaultScheduler (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/runSource.js:26:10)
    at drain (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/combinator/observe.js:36:46)
    at Stream._Stream2.default.drain (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/most/lib/index.js:219:29)
    at runApp (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/src/DOM/__tests__/functional.spec.tsx:67:76)
    at Context.done (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/src/DOM/__tests__/functional.spec.tsx:68:9)
    at callFnAsync (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runnable.js:368:21)
    at Test.Runnable.run (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runnable.js:318:7)
    at Runner.runTest (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:444:10)
    at /Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:550:12
    at next (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:361:14)
    at /Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:371:7
    at next (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:295:14)
    at /Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:334:7
    at done (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runnable.js:295:5)
    at callFn (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runnable.js:363:7)
    at Hook.Runnable.run (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runnable.js:337:7)
    at next (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:309:10)
    at Immediate.<anonymous> (/Users/marvinhagemeister/dev/github/marvinhagemeister/inferno/node_modules/mocha/lib/runner.js:339:5)
    at runCallback (timers.js:649:20)
    at tryOnImmediate (timers.js:622:5)
    at processImmediate [as _immediateCallback] (timers.js:594:5)