Validation error with nested oneOf

[sfeitosa]

We are developing a tool to apply differential test on json-schema libraries.

We found a subtle error happening only with the LUA's jsonschema library.

We used the following schema:

{
  "type": "object",
  "properties": {
    "resources": {
      "type": "object",
      "additionalProperties": {
        "type": "object",
        "oneOf": [
          {
            "type": "object",
            "properties": {
              "params": {
                "type": "object",
                "additionalProperties": {
                  "oneOf": [
                    { "type": "array" },
                    { "type": "object" },
                    { "type": "string" }
                  ]
                }
              }
            }
          }
        ]
      }
    }
  }
}

And the following document:

{
  "resources": {
    "myBicepWithInvalidParams": {
      "params": {
        "param1": []
      }
    }
  }
}

With these, it was generated the following error message:

Invalid doc for schema aspire property "resources"
validation failed: failed to validate additional
property myBicepWithInvalidParams: value should match
only one schema, but matches none