ConvertFrom-Json allows trailing commas in input JSON

[simonsabin]

Convertfrom-json and Test-Json both accept invalid json and neither provide ability to force strict parsing.

It looks like there are two related issues on NJsonSchame and NewtonSoft.Json the latter saying its expected behaviour.

RicoSuter/NJsonSchema#942
JamesNK/Newtonsoft.Json#818

Steps to reproduce

convertfrom-json "{'simon':'sabin',}"

Expected behavior

An error should occur as in Powershell 5.x

Actual behavior

Parses correctly and returns object matching the json

Environment data

Name                           Value
----                           -----
PSVersion                      6.2.3
PSEdition                      Core
GitCommitId                    6.2.3
OS                             Microsoft Windows 10.0.18362
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[iSazonov]

The cmdlets is based on Newtonsoft.Json and inherit the behavior.

I see no reason to do something until we migrate to System.Text.Json.

[simonsabin]

I realise that, this was more of a put it there so folks can hopefully find the information to understand the behaviour

[iSazonov]

I think we need a request to enhance the cmdlets with new parameter or parameters to support "options". This will be more useful for tracking.

[chriskuech]

Dup of #10628

[ghost]

This issue has been marked as duplicate and has not had any activity for 1 day. It has been closed for housekeeping purposes.