Unable to migrate Serverless function that references CodeUri S3 bucket

[steven10172]

When trying to migrate the following Serverless construct it failed with an error. Converting CodeUri to a string resolved the error and the migrate command continued as expected.

Construct:

  CheckMinimumCLIVersionLambdaFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri:
        Bucket:
          Fn::Sub: ${S3BucketName}
        Key:
          Fn::Sub: ${S3KeyName}
      Handler: dist/admin/check-cli-version.handler
      MemorySize: 512
      Role:
        Fn::GetAtt: [CheckMinimumCLIVersionLambdaRole, Arn]
      Runtime: nodejs16.x
      Timeout: 60
      AutoPublishAlias: live
      Environment:
        Variables:
          ACCOUNT_ID:
            Ref: AWS::AccountId
          MASTER_REGION:
            Fn::Sub: ${MasterAccountRegion}

Error:

MyStack could not be generated because Some(Union(Static([Primitive(String), Named("AWS::Serverless::Function.S3Location")]))) is not implemented for ResourceValue::Object

[iph]

I would be shocked if any SAM things work! Going to assign this as an enhancement, as one can take a serverless transform output from CFN and then pipe it into cdk-from-cfn.