CXSVC - Errors while generating a client with either swagger-codegen-cli 2.2.1 or editor.swagger.io

Description

I'm unable to generate a client for http://docs.oracle.com/cloud/latest/servicecs_gs/CXSVC/swagger.json

Swagger-codegen version

Both online version ( http://editor.swagger.io/#/) and swagger-codegen-cli 2.2.1

Swagger declaration file content or url

Swagger declaration url: http://docs.oracle.com/cloud/latest/servicecs_gs/CXSVC/swagger.json

The online swagger validator has no issues with that declaration:

http://online.swagger.io/validator/debug?url=http://docs.oracle.com/cloud/latest/servicecs_gs/CXSVC/swagger.json

and

http://online.swagger.io/validator?url=http://docs.oracle.com/cloud/latest/servicecs_gs/CXSVC/swagger.json

Command line used for generation

java -jar swagger-codegen-cli-2.2.1.jar generate -i http://docs.oracle.com/cloud/latest/servicecs_gs/CXSVC/swagger.json -l csharp

NOTE: tested also with http://editor.swagger.io/#/ , same issues

Output:

[main] INFO io.swagger.codegen.languages.CSharpClientCodegen - Generating code for .NET Framework v4.5
Exception in thread "main" java.lang.RuntimeException: Could not process model 'analyticsReportResults'.Please make sure that your schema is correct!
at io.swagger.codegen.DefaultGenerator.generate(DefaultGenerator.java:297)
at io.swagger.codegen.cmd.Generate.run(Generate.java:223)
at io.swagger.codegen.SwaggerCodegen.main(SwaggerCodegen.java:36)
Caused by: java.lang.NullPointerException
at io.swagger.codegen.languages.AbstractCSharpCodegen.getSwaggerType(AbstractCSharpCodegen.java:509)
at io.swagger.codegen.DefaultCodegen.getTypeDeclaration(DefaultCodegen.java:1119)
at io.swagger.codegen.languages.AbstractCSharpCodegen.getTypeDeclaration(AbstractCSharpCodegen.java:532)
at io.swagger.codegen.languages.AbstractCSharpCodegen.getTypeDeclaration(AbstractCSharpCodegen.java:525)
at io.swagger.codegen.languages.AbstractCSharpCodegen.getTypeDeclaration(AbstractCSharpCodegen.java:525)
at io.swagger.codegen.DefaultCodegen.fromProperty(DefaultCodegen.java:1572)
at io.swagger.codegen.DefaultCodegen.addVars(DefaultCodegen.java:2738)
at io.swagger.codegen.DefaultCodegen.addVars(DefaultCodegen.java:2709)
at io.swagger.codegen.DefaultCodegen.addVars(DefaultCodegen.java:2695)
at io.swagger.codegen.DefaultCodegen.fromModel(DefaultCodegen.java:1284)
at io.swagger.codegen.languages.CSharpClientCodegen.fromModel(CSharpClientCodegen.java:313)
at io.swagger.codegen.DefaultGenerator.processModels(DefaultGenerator.java:875)
at io.swagger.codegen.DefaultGenerator.generate(DefaultGenerator.java:290)
... 2 more

The failure occurs in AbstractCSharpCodegen.java:509 while processing the analyticsReportResults model from the provided swagger.json URL. Start by reproducing the exact Java command and inspect the schema property reaching getSwaggerType; done means C# client generation completes without the NullPointerException.