Compiled gson classes are duplicated in the war-file

[yggdrasildy]

Thanks for reporting an issue for Grails framework, please review the task list below before submitting the
issue. Your issue report will be closed if the issue is incomplete and the below tasks not completed.

NOTE: If you are unsure about something and the issue is more of a question a better place to ask questions is on Stack Overflow (http://stackoverflow.com/tags/grails) or Slack (http://slack-signup.grails.org). DO NOT use the issue tracker to ask questions.

Task List

• Steps to reproduce provided
• Stacktrace (if present) provided
• Example that reproduces the problem uploaded to Github
• Full description of the issue provided (see below)

Steps to Reproduce

1. grails create-app g401rest1 --profile=rest-api
2. gradle build

Expected Behaviour

There should be only one instance of each class.

Actual Behaviour

The compiled gson classes located in war://WEB-INF/classes are duplicated

Environment Information

• Operating System: Ubuntu 18.04
• Grails Version: 4.0.1
• JDK Version: 11.0.5-open
• Container Version (If Applicable): TODO

Example Application

• TODO: link to github repository with example that reproduces the issue

[bartoleo]

I have the same problem with a Grails 3.3.10 application with default json pages

[bobbywarner]

Closing as PR is merged.