NullPointerException caused by "in": "body"

Using this command:

swagger-codegen generate -i https://raw.githubusercontent.com/npomfret/coinsbank-php-sdk/master/reference/coinsbank-sapi.json -l spring -o .

I'm getting a NPE that seems to be caused by this:

"/card/name/_{cardUniqueId}": {
  "put": {
    "description": "Set user-defined card name",
    "parameters": [
      {
        "name": "cardUniqueId",
        "in": "path",
        "description": "Card UID",
        "required": true,
        "schema": {
          "type": "string",
          "format": "uuid"
        }
      },
      {
        "name": "params",
        "in": "body",
        "description": "Card params",
        "requried": true,
        "schema": {
          "properties": {
            "name": {
              "type": "string",
              "description": "User-defined card name"
            }
          }
        }
      }
    ],
    "responses": {
      "200": {
        "description": "Card has been renamed"
      }
    }
  }
},

If I remove the "in": "body", section of the 2nd parameter (the one called "params" confusingly) it works. Is this invalid swagger?

Reproduce the failure with the swagger-codegen command and the referenced coinsbank-sapi.json definition, focusing on the parameter whose "in" value is "body". Inspect how body parameters are handled and confirm that generation no longer raises a NullPointerException, or reports the definition as invalid with a useful error.