AutoPublishAlias with a !Ref value marked as false positive

cfn-lint version: 0.11.1

I’m running into an issue with AutoPublishAlias. When using a !Ref as its value, I get the following error message:

E0001 Resource with id [SkillFunction] is invalid. 'AutoPublishAlias' must be a string or a Ref to a template parameter
foo.yml:1:1

Here’s the minimal template to reproduce the issue:

---

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31

Parameters:
  Stage:
    Description: Environment stage (deployment phase)
    Type: String
    AllowedValues:
      - beta
      - prod

Resources:
  SkillFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: '.'
      Handler: main.handler
      Runtime: python3.7
      Timeout: 30
      MemorySize: 128
      AutoPublishAlias: !Ref Stage

The error message is actually very helpful (👏 for that), but as you can see, I am using a !Ref to a template parameter, so this should not cause a linting error.

[keetonian]

@kddejong my apologies, I had downloaded the latest version but still had an old version on my path that was run instead. I fixed my path to use the latest version and this works.

[kddejong]

@keetonian the template in this issue still works for me in the newest version. Can you explain more about the template you are having an issue with so I can try replicate the issue.