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LanguageExt.Fin fails to serialise using Newtonsoft.Json #1230

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davesmith9088 opened this issue Jul 11, 2023 · 0 comments
Open

LanguageExt.Fin fails to serialise using Newtonsoft.Json #1230

davesmith9088 opened this issue Jul 11, 2023 · 0 comments

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@davesmith9088
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I originally ran into this when using LanguageExt.Fin with Echo.Process. The type fails to serialise, the following code reproduces the problem:

using LanguageExt;
using Newtonsoft.Json;

var finVal = Fin<string>.Succ("hello");
var json = JsonConvert.SerializeObject(finVal);

The exception thrown is:

Newtonsoft.Json.JsonSerializationException: 'Self referencing loop detected with type 'LanguageExt.Fin1[System.String]'. Path ''.'`
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@davesmith9088