[5.1.1 MyGet] Failed to deserialize empty array

ServiceStack Serialization
1

We are currently receiving the following exception while trying to Deserialize a Json containing an empty int array:

    System.Runtime.Serialization.SerializationException: Failed to set property 'areeAnaliticheId' with '[]' ---> System.FormatException: Input string was not in a correct format.
       in ServiceStack.Text.SignedInteger`1.ParseInt64(ReadOnlySpan`1 value)
   in ServiceStack.Text.DefaultMemory.ParseInt32(ReadOnlySpan`1 value)
   in ServiceStack.Text.Common.DeserializeListWithElements`1.ParseIntList(ReadOnlySpan`1 value)
   in ServiceStack.Text.Common.DeserializeTypeRefJson.StringToType(ReadOnlySpan`1 strType, TypeConfig typeConfig, EmptyCtorDelegate ctorFn, KeyValuePair`2[] typeAccessors)
   --- Fine della traccia dello stack dell'eccezione interna ---
   in ServiceStack.Text.Common.DeserializeTypeRefJson.StringToType(ReadOnlySpan`1 strType, TypeConfig typeConfig, EmptyCtorDelegate ctorFn, KeyValuePair`2[] typeAccessors)
   in ServiceStack.Text.Common.DeserializeType`1.StringToTypeContext.DeserializeJson(ReadOnlySpan`1 value)
   in ServiceStack.Text.Json.JsonReader`1.Parse(ReadOnlySpan`1 value)
   in ServiceStack.Text.Json.JsonReader`1.Parse(String value)
   in ServiceStack.Text.JsonSerializer.DeserializeFromString[T](String value)
   in LabReboot.ServiceInterface.Services.DashboardPreferitiService.<Get>d__2.MoveNext() in C:\Git\LabReboot\LabReboot\LabReboot.ServiceInterface\Services\DashboardPreferitiService.cs:riga 44
--- Fine traccia dello stack da posizione precedente dove è stata generata l'eccezione ---
   in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   in ServiceStack.Host.ServiceRunner`1.<ExecuteAsync>d__13.MoveNext()

The Json contains a property areeAnaliticheId with the value []. This works on 5.1.0.

2

I’m unable to repro this issue:

public class EmptyCollections
{
    public string[] Strings { get; set; }
    public int[] Ints { get; set; }
}

[Test]
public void Can_deserialize_empty_array()
{
    Assert.That("[]".FromJson<string[]>(), Is.EquivalentTo(new string[0]));
    Assert.That("[]".FromJson<int[]>(), Is.EquivalentTo(new int[0]));
    
    Assert.That("{\"Strings\":[]}".FromJson<EmptyCollections>().Strings, Is.EquivalentTo(new string[0]));
    Assert.That("{\"Ints\":[]}".FromJson<EmptyCollections>().Ints, Is.EquivalentTo(new int[0]));
}

Please provide a stand-alone repro I can run. If this test fails for you, you have an old version and will need to clear your NuGet cache to install the latest version.

3

Actually, it works if my DTO uses int[], while it crashes when i change it to List<int> or IEnumerable<int> or basically any type different from array.

Can you verify that? List<int> works with no issues in 5.1.0.

EDIT: I had cleared all nuget cache as usual when working with MyGet releases.

4

Should now be resolved with this commit. This change is available from v5.1.1 that’s now on MyGet.