Array type on "default" property not accepted

[mhoeger]

Here is roughly my swagger file:

{
"swagger": "2.0",
...
"paths": {
    "/{connectionId}/v1.0/connection": {
      "post": {
        ...
        "parameters": [
          {
            "name": "body",
            "in": "body",
            "required": true,
            "schema": {
              "type": "object",
              "required": [
                "groupTypes"
              ],
              "properties": {
                "groupTypes": {
                  "type": "array",
                  "items": {
                    "type": "string",
                    "title": "",
                    "x-ms-summary": "Group Type"
                  },
                  "default": [
                    "Unified"
                  ]
                }
              }
            }
          }
       ]
      }
    }
  }
}

When I run autorest on this swagger file, it throws the following exception. The way to work around it is to remove the default value, but I think that a default array value should be accepted

   Loading AutoRest core      '/Users/mhoeger/.autorest/@[email protected]/node_modules/@autorest/core/dist' (3.0.6306)
   Loading AutoRest extension '@microsoft.azure/autorest.csharp' (~2.3.79->2.3.84)
   Loading AutoRest extension '@microsoft.azure/autorest.typescript' (~4.2.0->4.2.4)
   Loading AutoRest extension '@microsoft.azure/autorest.modeler' (2.3.51->2.3.51)
   Loading AutoRest extension '@microsoft.azure/autorest.modeler' (2.3.55->2.3.55)
FATAL: Error parsing swagger file. Unexpected character encountered while parsing value: [. Path 'components.schemas.schemas:4.default', line 1, position 29438.
FATAL: Error parsing swagger file. Unexpected character encountered while parsing value: [. Path 'components.schemas.schemas:4.default', line 1, position 29438.
FATAL: AutoRest.Core.Logging.CodeGenerationException: Error parsing swagger file. Unexpected character encountered while parsing value: [. Path 'components.schemas.schemas:4.default', line 1, position 29438.
   at AutoRest.Modeler.SwaggerParser.Parse(String swaggerDocument) in c:\publish\autorest.modeler\src\SwaggerParser.cs:line 52
   at AutoRest.Modeler.Program.<ProcessInternal>d__2.MoveNext() in c:\publish\autorest.modeler\src\Program.cs:line 58
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NewPlugin.<Process>d__15.MoveNext()
FATAL: AutoRest.Core.Logging.CodeGenerationException: Error parsing swagger file. Unexpected character encountered while parsing value: [. Path 'components.schemas.schemas:4.default', line 1, position 29438.
   at AutoRest.Modeler.SwaggerParser.Parse(String swaggerDocument) in c:\publish\autorest.modele
   at AutoRest.Modeler.Program.<ProcessInternal>d__2.MoveNext() in c:\publish\autorest.modeler\src\Program.cs:line 58
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NewPlugin.<Process>d__15.MoveNext()
  Error: Plugin imodeler1 reported failure.

[jianyexi]

@timotheeguerin This is a pain point for several RPs , as fixing ARM round-trip issues needs to add default value which might be any type