navigating to an invalid URL breaks the repl

[shawwn]

$ node .
[x] window.location.href = 'https://fnkwejralkjfdnklsjrelwkejrkj.com'
Thrown:
{ Error: cancel request: window destroyed
    at WorkerVm.window.destroy.destroy (/Users/emily/exokit-june/src/WindowVm.js:208:19)
    at WorkerVm.window.on (/Users/emily/exokit-june/src/WindowVm.js:183:12)
    at WorkerVm.emit (events.js:193:13)
    at WorkerVm.EventEmitter.emit (domain.js:481:20)
    at Worker._message (/Users/emily/exokit-june/src/WindowVm.js:39:16)
    at Worker.emit (events.js:193:13)
    at Worker.EventEmitter.emit (domain.js:481:20)
    at MessagePort.Worker.(anonymous function).on (internal/worker.js:114:55)
    at MessagePort.emit (events.js:193:13)
    at MessagePort.EventEmitter.emit (domain.js:481:20) code: 'ECANCEL' }
[x] FetchError: request to https://fnkwejralkjfdnklsjrelwkejrkj.com/ failed, reason: getaddrinfo ENOTFOUND fnkwejralkjfdnklsjrelwkejrkj.com fnkwejralkjfdnklsjrelwkejrkj.com:443
    at ClientRequest.<anonymous> (/Users/emily/exokit-june/node_modules/window-fetch/lib/index.js:1292:16)
    at ClientRequest.emit (events.js:193:13)
    at ClientRequest.EventEmitter.emit (domain.js:481:20)
    at TLSSocket.socketErrorListener (_http_client.js:397:9)
    at TLSSocket.emit (events.js:193:13)
    at TLSSocket.EventEmitter.emit (domain.js:481:20)
    at emitErrorNT (internal/streams/destroy.js:91:8)
    at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
    at processTicksAndRejections (internal/process/task_queues.js:81:17)
[x] 21
Thrown:
TypeError: Cannot read property 'runRepl' of null
    at REPLServer.replEval (/Users/emily/exokit-june/src/index.js:1550:31)
    at bound (domain.js:425:14)
    at REPLServer.runBound [as eval] (domain.js:438:12)
    at REPLServer.onLine (repl.js:650:10)
    at REPLServer.emit (events.js:193:13)
    at REPLServer.EventEmitter.emit (domain.js:481:20)
    at REPLServer.Interface._onLine (readline.js:308:10)
    at REPLServer.Interface._line (readline.js:675:8)
    at REPLServer.Interface._ttyWrite (readline.js:954:14)
    at REPLServer.self._ttyWrite (repl.js:727:7)
[x] 33
Thrown:
TypeError: Cannot read property 'runRepl' of null
    at REPLServer.replEval (/Users/emily/exokit-june/src/index.js:1550:31)
    at bound (domain.js:425:14)
    at REPLServer.runBound [as eval] (domain.js:438:12)
    at REPLServer.onLine (repl.js:650:10)
    at REPLServer.emit (events.js:193:13)
    at REPLServer.EventEmitter.emit (domain.js:481:20)
    at REPLServer.Interface._onLine (readline.js:308:10)
    at REPLServer.Interface._line (readline.js:675:8)
    at REPLServer.Interface._ttyWrite (readline.js:954:14)
    at REPLServer.self._ttyWrite (repl.js:727:7)
[x]