Reading YAML error: Cannot read the Value of an empty anchor

[vmelamed]

Deserializing YAML throws InvalidOperationException with message 'Cannot read the Value of an empty anchor'

Hello,

Here is my code:

MyClass? ParseYaml(ArgumentResult _, TextReader reader)
{
        var yamlStream = new YamlStream();

        yamlStream.Load(reader);

        var doc = yamlStream.Documents[0].ToJsonDocument();
        return doc.Deserialize<MyClass>();
}

But from the last line, it throws an InvalidOperationException exception (see below) with the message 'Cannot read the Value of an empty anchor'. Am I missing something in my YAML (see below)?

Thank you
Val

System.InvalidOperationException
  HResult=0x80131509
  Message=Cannot read the Value of an empty anchor
  Source=YamlDotNet
  StackTrace:
   at YamlDotNet.Core.AnchorName.get_Value()
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.GetMemberAndWriteJson(Object obj, WriteStack& state, Utf8JsonWriter writer) in /_/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Metadata/JsonPropertyInfoOfT.cs:line 229
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryWrite(Utf8JsonWriter writer, T value, JsonSerializerOptions options, WriteStack& state) in /_/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Object/ObjectDefaultConverter.cs:line 340
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state) in /_/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonConverterOfT.cs:line 430
    ...
    [Call Stack Truncated]

  This exception was originally thrown at this call stack:
    YamlDotNet.Core.AnchorName.Value.get()
    System.Text.Json.Serialization.Metadata.JsonPropertyInfo<T>.GetMemberAndWriteJson(object, ref System.Text.Json.WriteStack, System.Text.Json.Utf8JsonWriter) in JsonPropertyInfoOfT.cs
    System.Text.Json.Serialization.Converters.ObjectDefaultConverter<T>.OnTryWrite(System.Text.Json.Utf8JsonWriter, T, System.Text.Json.JsonSerializerOptions, ref System.Text.Json.WriteStack) in ObjectDefaultConverter.cs
    ...
    [Call Stack Truncated]

Here is the YAML:

description: Test CLI deployment
workload:
  serviceNamespace: Pool
  name: TestWorkload
  description: Example CLI workload
version: 0.0.0
packageFilename: TBD
selectors:
  os: windows
  dotnet-framework: net6.0
tolerations:
  - key: os
    value: windows
    effect: NoExecute
    operator: Equal
environmentVariables:
  Logging__LogLevel__Default: Information
  Logging__LogLevel__Microsoft: Warning
entryPoint: Delinea.EnginePool.TestWorkload.Console.exe
arguments: arg1 arg2
settingTemplates:
  - key: ID
    name: Unique identifier
    valueType: uuid
    description: Some unique identifier
  - key: dns
    name: DNS server address
    valueType: string
    description: Address of the DNS server
secretTemplates:
  - key: secret-key1
    name: Secret Key No1
    description: This is the secret 1
  - key: secret-key2
    name: Secret Key No2
    description: This is the secret 2
deprecated: false

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[gregsdennis]

This error doesn't involve my libraries. I think you'll need to take this to YamlDotNet, which is what I use to read the YAML.

[gregsdennis]

@vmelamed did you end up opening an issue with YamlDotNet?