Chart.combine sometimes results in "Collection was modified; enumeration operation may not execute."

System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.MoveNext()
   at <StartupCode$DynamicObj-FSC472>.$DynamicObj.GetProperties@81.GenerateNext(IEnumerable`1& next)
   at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl()
   at Microsoft.FSharp.Collections.SeqModule.ToList[T](IEnumerable`1 source)
   at DynamicObj.DynamicObj.GetProperties(Boolean includeInstanceProperties)
   at DynamicObj.DynObj.combine(DynamicObj first, DynamicObj second)
   at DynamicObj.DynObj.combine(DynamicObj first, DynamicObj second)
   at DynamicObj.DynObj.combine(DynamicObj first, DynamicObj second)
   at Plotly.NET.GenericChart.combineLayouts@243(Layout first, Layout second)
   at Plotly.NET.GenericChart.combine@309.Invoke(GenericChart acc, GenericChart elem)

The sequences of data I'm feeding it are from immutable lists; so I don't think it's a problem with the way I'm calling Plotly.NET.

I can try again (with the same data) and usually it is successful. Seems to be a sporadic issue. Very odd.

Beginne mit dem Stacktrace durch DynamicObj.GetProperties, DynObj.combine, GenericChart.combineLayouts und GenericChart.combine; das Issue nennt keine Quelldateien oder Tests. Reproduziere die intermittierende Ausnahme beim Kombinieren von Charts und verifiziere anschließend, dass das Kombinieren von Charts nicht mehr den Fehler wegen einer geänderten Collection auslöst, und füge dort Regressionstests hinzu, wo sich die bestehenden Tests für diesen Pfad befinden.