$ref in parameters is not properly detected, and flagged as error

Q	A
Bug or feature request?	Bug
Which Swagger/OpenAPI version?	3.0
Which Swagger-Editor version?	3.1.20 and 3.2.0
How did you install Swagger-Editor?	git clone + npm start
Which broswer & version?	Chrome 63
Which operating system?	MacOS

Demonstration API definition

openapi: 3.0.0
info:
  title: DNSimple API
  version: 2.0.0
  contact:
    name: DNSimple Support
    email: [e-mail]
    url: 'https://dnsimple.com/contact'
  description: >-
    [DNSimple](https://dnsimple.com) provides DNS hosting and domain registration that is simple and friendly.
  termsOfService: 'https://dnsimple.com/terms'
externalDocs:
  url: 'https://developer.dnsimple.com'
servers:
  - url: 'https://api.dnsimple.com/v2'
    description: DNSimple Production API
    variables: {}
paths:
  '/{account}/domains':
    summary: Operations on domain collections.
    parameters:
      - $ref: '#/components/parameters/Account'
    get:
      description: List domains in the account.
      parameters:
        - $ref: '#/components/parameters/Account'
      operationId: listDomains
      tags:
        - domains
      responses:
        '200':
          description: >-
            Depending on how you are authenticated you will see all the accounts
            you have access to or the account you used to authenticate.
components:
  parameters:
    Account:
      name: account
      in: path
      required: true
      description: The account id
      schema:
        type: integer
    Domain:
      name: domain
      in: path
      required: true
      description: The domain name or id
      schema:
        type: string

Configuration (browser query string, constructor, config.yaml)

all default, no query string

Expected Behavior

There should be no validation error for the {account} parameter.

Current Behavior

Semantic error at paths./{account}/domains
Declared path parameter "account" needs to be defined as a path parameter at either the path or operation level

Context

According to the specs, an item in the parameters collection can be either a Parameter Object or Reference object. https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md#fixed-fields-7

However, if we use the Parameter Object itself, it works:

      parameters:
      -  name: account
          in: path
          required: true
          description: The account id
          schema:
            type: integer

If we use a reference, it doesn’t:

      parameters:
        - $ref: '#/components/parameters/Account'

and instead a validation error is shown.

[weppos]

Thanks @shockey! I confirm it works great now.

[scara]

TNX for your reply! 👍 Apologies: I didn’t look at the releases yet, just looked here.