# To reproduce Microsoft.OpenApi.Readers 1.2.2 OpenAPI 2.0 document: ```JSON { "swagger": "2.0", "info": { "title": "Demo", "version": "1" }, "paths": {}, "definitions": { "demo": { "x-tag": null } } } ``` Read with an extension parser that throws OpenApiException: ```C# var settings = new OpenApiReaderSettings() { ExtensionParsers = { { "x-tag", (any, version) => throw new OpenApiException("Testing") }, }, }; var apiReader = new OpenApiStreamReader(settings); OpenApiDocument document = apiReader.Read(stream, out OpenApiDiagnostic diagnostic); Console.Error.WriteLine(diagnostic.Errors[0]); ``` # Expected result `Testing [#/definitions/demo/x-tag]` # Actual result `Testing [#/definitions/x-tag]`