Call http using POST/PATCH/PUT methods without `with.body` throws IllegalArgumentException

[mcruzdev]

When using Quarkus Flow and trying to define the following workflow via YAML:

document:
  dsl: 1.0.0
  namespace: guru-quarkus
  name: processPhotoWorkflowYaml
  version: 0.1.0
use:
  authentications:
    flowPhotosAuth:
      oauth2:
        authority: https://auth.flowphotos.io/realms/flowphotos
        grant: client_credentials
        client:
          id: '${ $secret.photoService.clientId }'
          secret: '${ $secret.photoService.clientSecret }'
        endpoints:
          token: /protocol/openid-connect/token
do:
  - processPhoto:
      call: http
      with:
        method: post
        endpoint:
          uri: 'https://photos.internal.flowphotos.io/api/photos/{photoId}/process'
          authentication:
            use: flowPhotosAuth
  - notifyPhotoProcessed:
      call: http
      with:
        method: post
        endpoint:
          uri: https://notifications.internal.flowphotos.io/api/notifications
          authentication:
            use: flowPhotosAuth

I received the following stacktrace:

Caused by: java.lang.IllegalArgumentException: Both object and str are null

The specification says that body is not a required field: https://github.com/open-workflow-specification/specification/blob/main/dsl-reference.md#http-call.

Expected behavior

Build the workflow via YAML without exception when setting an HTTP call (call: http) without body (with.body) when using POST, PATCH or PUT.