Request $expand=* leads to NPE in TecSvc and Tutorial (P6)

{
code: "500",
info: "Internal Server Error"
},
headers: {
OData-Version: "4.0",
Content-Type: "application/json;odata.metadata=minimal"
},
body: "{"error":{"code":null,"message":"OData Library: An exception without message text was thrown."}}"

exceptions: [
{
class: "java.lang.NullPointerException",
message: null,
invocation: {
class: "org.apache.olingo.server.tecsvc.processor.queryoptions.ExpandSystemQueryOptionHandler",
method: "getInnerExpandOption",
line: "241"
}
}
],
stacktrace: [
{
class: "org.apache.olingo.server.tecsvc.processor.queryoptions.ExpandSystemQueryOptionHandler",
method: "getInnerExpandOption",
line: "241"
},
{
class: "org.apache.olingo.server.tecsvc.processor.queryoptions.ExpandSystemQueryOptionHandler",
method: "transformEntityGraphToTree",
line: "149"
},
{
class: "org.apache.olingo.server.tecsvc.processor.queryoptions.ExpandSystemQueryOptionHandler",
method: "transformEntitySetGraphToTree",
line: "127"
},
{
class: "org.apache.olingo.server.tecsvc.processor.TechnicalEntityProcessor",
method: "readEntityCollection",
line: "510"
}