6.3.0 System.ArgumentException: Literal sections cannot contain the '?' character.

Hi,

Recently updated from 6.2.1 to 6.3.0 and stuff started breaking. I’m running an OData controller via aspnet-api-versioning

Any endpoint within an OData controller with manually defined query parameters results in System.ArgumentException: The literal section 'QuantityUnits?onlyValid=' is invalid. Literal sections cannot contain the '?' character. (Parameter 'routeTemplate')

Controller and endpoint:

namespace WebApi.V1.CodeLists;

[ODataRoutePrefix("QuantityUnits")]
public class QuantityUnitsController : BaseODataController {
    [EnableQuery]
    [ProducesResponseType(typeof(ODataListWrapper<IQueryable<QuantityUnitOutput>>), Status200OK)]
    public async Task<IQueryable<QuantityUnitOutput>> Get(bool onlyValid = true) => ...
}

This works in 6.2.1. In 6.2.3 I observed that the swagger.json generation works, but the endpoint produced has a trailing {, e.g. /api/v1/odata/QuantityUnits{ which of course doesn’t really work.

Any idea where to start digging?

Full stack trace:

[14:07:26 INF] Request starting HTTP/2 GET https://localhost:44395/swagger/v1/swagger.json - -
[14:07:26 ERR] An unhandled exception has occurred while executing the request.
System.ArgumentException: The literal section 'QuantityUnits?onlyValid=' is invalid. Literal sections cannot contain the '?' character. (Parameter 'routeTemplate')
 ---> Microsoft.AspNetCore.Routing.Patterns.RoutePatternException: The literal section 'QuantityUnits?onlyValid=' is invalid. Literal sections cannot contain the '?' character.
   at Microsoft.AspNetCore.Routing.Patterns.RoutePatternParser.Parse(String pattern)
   at Microsoft.AspNetCore.Routing.Patterns.RoutePatternFactory.Parse(String pattern)
   at Microsoft.AspNetCore.Routing.Template.TemplateParser.Parse(String routeTemplate)
   --- End of inner exception stack trace ---
   at Microsoft.AspNetCore.Routing.Template.TemplateParser.Parse(String routeTemplate)
   at Swashbuckle.AspNetCore.SwaggerGen.ApiDescriptionExtensions.RelativePathSansParameterConstraints(ApiDescription apiDescription)
   at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenerator.<>c.<GeneratePaths>b__6_0(ApiDescription apiDesc)
   at System.Linq.Lookup`2.Create(IEnumerable`1 source, Func`2 keySelector, IEqualityComparer`1 comparer)
   at System.Linq.GroupedEnumerable`2.GetEnumerator()
   at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenerator.GeneratePaths(IEnumerable`1 apiDescriptions, SchemaRepository schemaRepository)
   at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenerator.GetSwagger(String documentName, String host, String basePath)
   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Hellang.Middleware.ProblemDetails.ProblemDetailsMiddleware.Invoke(HttpContext context)