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.

DynamicObj.GetProperties、DynObj.combine、GenericChart.combineLayouts、GenericChart.combine を通るスタックトレースから始めます。issue にはソースファイルもテストも記載されていません。チャートの結合中に断続的に発生する例外を再現し、その後、チャートの結合で collection-modified エラーが発生しなくなったことを確認し、このパスに対する既存のテストがある場所に回帰テストのカバレッジを追加します。