repro_1051.json

{
    "swagger": "2.0",
    "info": {
        "version": "0.0.0",
        "title": "Simple API"
    },
    "paths": {
        "/": {
            "get": {
                "operationId":"repro",
                "responses": {
                    "200": {
                        "description": "OK",
                        "schema" : {
                            "$ref": "#/definitions/SuperObject"
                        }
                    }
                }
            }
        }
    },
    "definitions" : {
        "SuperObject": {
        "type": "object",
        "properties": {
            "thingType": {
                "type": "string",
                "enum": [
                    "FOO",
                    "BAR"
                ]
            }
        }
    },
    "SubObject": {
        "allOf": [
            {
                "$ref": "#/definitions/SuperObject"
            },
            {
                "type": "object",
                "properties": {
                    "thingType": {
                        "type": "string",
                        "enum": [
                            "FOO",
                            "BAR"
                        ]
                    },
                    "anotherProperty": {
                        "type": "string"
                    }
                }
            }
        ]
    }
    }
}