v14-rc1 : Checkbox and, Dropdown lists in cause "JSON" error when saving/loading a content page.

[KevinJump]

Which Umbraco version are you using? (Please write the exact version, example: 10.1.0)

v14-rc1

Bug summary

Pages containing checkbox lists throw an error and not load once a items have been selected in the list

'S' is an invalid start of a value. Path: $ | LineNumber: 0 | BytePositionInLine: 0.
A fatal server error occurred. If this continues, please reach out to your administrator.

Specifics

Looks like there is a parsing error with the data that the checkbox, dropdown or radio button lists store.

Steps to reproduce

• Create a checkbox list datatype with multiple (e.g 4) options
• Create a new document type containing a checkbox list property
• Create a page with the new doctype
• Pick one or more values from the checkbox
• Save

Expected result / actual result

No response

[github-actions]

Hi there @KevinJump!

Firstly, a big thank you for raising this issue. Every piece of feedback we receive helps us to make Umbraco better.

We really appreciate your patience while we wait for our team to have a look at this but we wanted to let you know that we see this and share with you the plan for what comes next.

• We'll assess whether this issue relates to something that has already been fixed in a later version of the release that it has been raised for.
• If it's a bug, is it related to a release that we are actively supporting or is it related to a release that's in the end-of-life or security-only phase?
• We'll replicate the issue to ensure that the problem is as described.
• We'll decide whether the behavior is an issue or if the behavior is intended.

We wish we could work with everyone directly and assess your issue immediately but we're in the fortunate position of having lots of contributions to work with and only a few humans who are able to do it. We are making progress though and in the meantime, we will keep you in the loop and let you know when we have any questions.

Thanks, from your friendly Umbraco GitHub bot 🤖 🙂

[elit0451]

Hi there @KevinJump 👋

Thanks for reaching out! I can indeed reproduce this, we will have a look 🙂

Here is the error from the logs:

System.Text.Json.JsonException: 'S' is an invalid start of a value. Path: $ | LineNumber: 0 | BytePositionInLine: 0.
 ---> System.Text.Json.JsonReaderException: 'S' is an invalid start of a value. LineNumber: 0 | BytePositionInLine: 0.
   at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)
   at System.Text.Json.Utf8JsonReader.ConsumeValue(Byte marker)
   at System.Text.Json.Utf8JsonReader.ReadFirstToken(Byte first)
   at System.Text.Json.Utf8JsonReader.ReadSingleSegment()
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, JsonReaderException ex)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo`1 jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
   at Umbraco.Cms.Infrastructure.Serialization.SystemTextJsonSerializerBase.Deserialize[T](String input) in /UmbracoCMS/src/Umbraco.Infrastructure/Serialization/SystemTextJsonSerializerBase.cs:line 17
   at Umbraco.Cms.Core.PropertyEditors.MultipleValueEditor.ToEditor(IProperty property, String culture, String segment) in /UmbracoCMS/src/Umbraco.Infrastructure/PropertyEditors/MultipleValueEditor.cs:line 45

[kjac]

Good stuff! Fixed in #16132

[KevinJump]

Hi, Juist to confirm this isn't in RC2 ?

[leekelleher]

@KevinJump It just missed the cut off point for RC2, it'll be in the next nightly (and RC3).