AddLink saved in Batch leads to System.UriFormatException

Processing of payload with a reference to one of Content-ID of the same batch throws System.UriFormatException

Assemblies affected

1.0.0-rc1.20191003.1 https://github.com/OData/RESTier/tree/1.0.0-rc1.20191003.1
Also tried with newest Microsoft.AspNet.OData 7.3.0 https://github.com/OData/WebApi/releases/tag/7.3.0

Reproduce steps

Add several entities to DataServicesContext, add link between two of these entities using DataServicesContext.AddLink, save chages with SaveChangesOptions.BatchWithSingleChangeset

Please check Content-ID: 6, that piece provokes the exception.

Full payload sent:
`
POST http://SERVER/odata/v4/$batch HTTP/1.1
OData-Version: 4.0
OData-MaxVersion: 4.0
Content-Type: multipart/mixed; boundary=batch_9350e84b-9023-4534-9819-67caf5859cd9
Accept: multipart/mixed
Accept-Charset: UTF-8
User-Agent: Microsoft.OData.Client/7.6.2
Host: SERVER
Content-Length: 4625
Expect: 100-continue

--batch_9350e84b-9023-4534-9819-67caf5859cd9
Content-Type: multipart/mixed; boundary=changeset_e24f630a-44bc-47a9-986e-88b2199e9d6e

--changeset_e24f630a-44bc-47a9-986e-88b2199e9d6e
Content-Type: application/http
Content-Transfer-Encoding: binary
Content-ID: 1

POST http://SERVER/odata/v4/Entity1Data HTTP/1.1
OData-Version: 4.0
OData-MaxVersion: 4.0
Content-Type: application/json;odata.metadata=minimal
Accept: application/json;odata.metadata=minimal
Accept-Charset: UTF-8
User-Agent: Microsoft.OData.Client/7.6.2

{"@odata.type":"#Domain.ReferenceData.Ns1.Ns1Entity1Data","CreatedByUserId":0,"CreatedOn":"2020-01-03T14:21:49.7240272Z","DataSourceUri":null,"Id":-2147483644,"Entity1Id":-2147483645,"Name":"RESTier test","LegalAddress":{"@odata.type":"#Domain.ReferenceData.PostalAddress","City":null,"Line1":null,"Line2":null,"PostCode":null,"State":null},"LegalAddressExtension":{"@odata.type":"#Domain.ReferenceData.Ns1.Ns1AddressExtension","CityCode":null,"ContinentCode":null,"CountyCode":null,"StateAbv":null,"StateCode":null}}

...
...
...
...
...

--changeset_e24f630a-44bc-47a9-986e-88b2199e9d6e
Content-Type: application/http
Content-Transfer-Encoding: binary
Content-ID: 3

POST http://SERVER/odata/v4/Entities2 HTTP/1.1
OData-Version: 4.0
OData-MaxVersion: 4.0
Content-Type: application/json;odata.metadata=minimal
Accept: application/json;odata.metadata=minimal
Accept-Charset: UTF-8
User-Agent: Microsoft.OData.Client/7.6.2

{"@odata.type":"#Domain.Entity1Dependent","CreatedByUserId":0,"CreatedOn":"2020-01-03T14:21:49.7240272Z","CurrentApprovalStateId":-2147483646,"EffectiveTill":null,"Id":-2147483647,"LastModifiedByUserId":null,"LastModifiedOn":null,"Entity1Id":-2147483645}

...
...
...
...
...

--changeset_e24f630a-44bc-47a9-986e-88b2199e9d6e
Content-Type: application/http
Content-Transfer-Encoding: binary
Content-ID: 5

POST http://SERVER/odata/v4/Events HTTP/1.1
OData-Version: 4.0
OData-MaxVersion: 4.0
Content-Type: application/json;odata.metadata=minimal
Accept: application/json;odata.metadata=minimal
Accept-Charset: UTF-8
User-Agent: Microsoft.OData.Client/7.6.2

{"@odata.type":"#Domain.Entity2ChangedEvent","CreatedByUserId":0,"CreatedOn":"0001-01-01T00:00:00Z","Id":0,"ModifiedByUserId":0,"ModifiedOn":"0001-01-01T00:00:00Z","RowVersion":null,"StatusIntVal":1}
--changeset_e24f630a-44bc-47a9-986e-88b2199e9d6e
Content-Type: application/http
Content-Transfer-Encoding: binary
Content-ID: 6

POST $5/Domain.Entity2ChangedEvent/Entities2/$ref HTTP/1.1
OData-Version: 4.0
OData-MaxVersion: 4.0
Accept: application/json;odata.metadata=minimal
Accept-Charset: UTF-8
Content-Type: application/json;odata.metadata=minimal
User-Agent: Microsoft.OData.Client/7.6.2

{"@odata.id":"$3"}
--changeset_e24f630a-44bc-47a9-986e-88b2199e9d6e--
--batch_9350e84b-9023-4534-9819-67caf5859cd9--
`

Expected result

New entities are stored, EF many to many linking table should get new record pointing to two of newly created entities

Actual result

System.UriFormatException is thrown on server side
`
HTTP/1.1 200 OK
Cache-Control: no-cache
Pragma: no-cache
Content-Type: multipart/mixed; boundary=batchresponse_8a365bb7-f465-4a7d-8017-1285abc86dca
Expires: -1
Server: Microsoft-IIS/10.0
OData-Version: 4.0
X-AspNet-Version: 4.0.30319
Persistent-Auth: true
X-Powered-By: ASP.NET
Date: Fri, 03 Jan 2020 14:21:50 GMT
Content-Length: 1530

--batchresponse_8a365bb7-f465-4a7d-8017-1285abc86dca
Content-Type: multipart/mixed; boundary=changesetresponse_a01078c3-45f4-46c4-903c-74dc0331d00d

--changesetresponse_a01078c3-45f4-46c4-903c-74dc0331d00d
Content-Type: application/http
Content-Transfer-Encoding: binary
Content-ID: 1

HTTP/1.1 500 Internal Server Error
Content-Type: application/json; odata.metadata=minimal; charset=utf-8
OData-Version: 4.0

{"error":{"code":"","message":"An error has occurred.","innererror":{"message":"Invalid URI: The format of the URI could not be determined.","type":"System.UriFormatException","stacktrace":" at void Uri.CreateThis(string uri, bool dontEscape, UriKind uriKind)\r\n at async Task Microsoft.AspNet.OData.Batch.ODataBatchRequestItem.SendMessageAsync(HttpMessageInvoker invoker, HttpRequestMessage request, CancellationToken cancellationToken, Dictionary<string, string> contentIdToLocationMapping)\r\n at async Task System.Web.Http.Controllers.ApiControllerActionInvoker.InvokeActionAsyncCore(HttpActionContext actionContext, CancellationToken cancellationToken)\r\n at async Task System.Web.Http.Controllers.ActionFilterResult.ExecuteAsync(CancellationToken cancellationToken)\r\n at async Task System.Web.Http.Controllers.ExceptionFilterResult.ExecuteAsync(CancellationToken cancellationToken)"}}}
--changesetresponse_a01078c3-45f4-46c4-903c-74dc0331d00d--
--batchresponse_8a365bb7-f465-4a7d-8017-1285abc86dca--
`

Additional details

Of course, the exception is throw from Microsoft.AspNet.OData.Batch.ODataBatchRequestItem.SendMessageAsync, so i probably must create that issue in Microsoft.OData project, just wanted to be sure, that RESTier is not provoking that behavior.
But as i got from OData docs, that type of references/URLs/operations should be supported in AspNet.OData library.