Using Schema/Config API breaks the File-Upload of Config Set File

curl -X POST -H 'Content-Type: application/json' -i http://localhost:8984/solr/test/schema --data '{
  "add-field":{
     "name":"my-field",
     "type":"string",
     "stored":true }
}'

curl -X POST --header "Content-Type:application/json" --data-binary @test.json "http://localhost:8983/solr/admin/configs?action=UPLOAD&name=test&filePath=test.json&wt=xml&omitHeader=true"

<?xml version="1.0" encoding="UTF-8"?>
<response><lst name="error">
  <str name="msg">JSON Parse Error: char=#0;,position=0 AFTER='#0;' BEFORE=''</str>
  <str name="trace">org.noggit.JSONParser$ParseException: JSON Parse Error: char=#0;,position=0 AFTER='#0;' BEFORE=''
        at org.noggit.JSONParser.err(JSONParser.java:452)
        at org.noggit.JSONParser.handleNonDoubleQuoteString(JSONParser.java:819)
        at org.noggit.JSONParser.next(JSONParser.java:1026)
        at org.noggit.JSONParser.nextEvent(JSONParser.java:1073)
        at org.noggit.ObjectBuilder.&lt;init&gt;(ObjectBuilder.java:84)
        at org.apache.solr.common.util.Utils.lambda$static$1(Utils.java:356)
        at org.apache.solr.common.util.Utils.fromJSON(Utils.java:319)
        at org.apache.solr.common.util.Utils.fromJSON(Utils.java:305)
        at org.apache.solr.handler.admin.ConfigSetsHandler.isCurrentlyTrusted(ConfigSetsHandler.java:328)
        at org.apache.solr.handler.admin.ConfigSetsHandler.ensureOverwritingUntrustedConfigSet(ConfigSetsHandler.java:308)
        at org.apache.solr.handler.admin.ConfigSetsHandler.createBaseZnode(ConfigSetsHandler.java:269)
        at org.apache.solr.handler.admin.ConfigSetsHandler.handleConfigUploadRequest(ConfigSetsHandler.java:205)
        at org.apache.solr.handler.admin.ConfigSetsHandler.handleRequestBody(ConfigSetsHandler.java:113)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:216)
        at org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:836)
        at org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:800)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:545)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:427)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:357)
        at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:201)
        at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:600)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:191)
        at org.eclipse.jetty.server.handler.InetAccessHandler.handle(InetAccessHandler.java:177)
        at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)
        at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:763)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.Server.handle(Server.java:516)
        at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:400)
        at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:645)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:392)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
        at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
        at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
        at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
        at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
        at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
        at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
        at java.lang.Thread.run(Thread.java:748)
</str>
  <int name="code">500</int>
</lst>
</response>