Layered NPE with edgeRouting: SPLINES if logging: true or measureExecutionTime: true

[keyserj]

Describe the bug
With a graph of:

{
  "id": "elkgraph",
  "children": [
    {
      "id": "bd654195-00dd-469c-8550-5551dc232602",
      "width": 176,
      "height": 66
    }
  ],
  "edges": []
}

and layoutOptions of:

{
  "algorithm": "layered",
  "elk.direction": "DOWN",
  "elk.edgeRouting": "SPLINES"
}

the following invocations both throw a Null Pointer Exception:

new ELK().layout(graph, { layoutOptions, logging: true })
new ELK().layout(graph, { layoutOptions, measureExecutionTime: true })

Not sure if there's a way to get a more useful error, but this is the log:

Uncaught (in promise) TypeError: java.lang.NullPointerException
    at Ngb.Pgb [as ee] (elk-worker.min.js:6399:100191)
    at Ngb.vz [as je] (elk-worker.min.js:6399:92187)
    at Ngb.mz (elk-worker.min.js:2029:38)
    at Ngb.xz (elk-worker.min.js:1122:18)
    at new Ngb (elk-worker.min.js:1129:19)
    at new OC (elk-worker.min.js:2762:38)
    at NId (elk-worker.min.js:5920:51)
    at NId (elk-worker.min.js:5920:395)
    at NId (elk-worker.min.js:5920:395)
    at QId (elk-worker.min.js:6004:415)
    at h.dispatch (elk-worker.min.js:6317:473)
    at h.saveDispatch (elk-worker.min.js:6317:603)
    at eval (elk-worker.min.js:6318:162)

The error is not thrown if using edgeRouting: "POLYLINE" or removing logging/measureExecutionTime.

Expected behavior
No error.

Screenshots
n/a

ELK Version
elkjs 0.9.3

Additional context
This is not an issue with ELK, e.g. this elklive works.

Also I haven't actually needed logging or measureExecutionTime in months, I've just had it enabled. So removing those parameters is a simple workaround for me.