Hi,

In our project, we are not directly using activesupport, but grape does. This is fetching latest version of activesupport, which is currently 7.0.2.

Problem

Starting up the application is raising the following exception:

NameError:
  uninitialized constant ActiveSupport::XmlMini::IsolatedExecutionState
# /usr/local/bundle/gems/activesupport-7.0.2/lib/active_support/xml_mini.rb:184:in `current_thread_backend'
# /usr/local/bundle/gems/activesupport-7.0.2/lib/active_support/xml_mini.rb:103:in `backend='
# /usr/local/bundle/gems/activesupport-7.0.2/lib/active_support/xml_mini.rb:201:in `<module:ActiveSupport>'
# /usr/local/bundle/gems/activesupport-7.0.2/lib/active_support/xml_mini.rb:11:in `<top (required)>'
# /usr/local/bundle/gems/activesupport-7.0.2/lib/active_support/core_ext/array/conversions.rb:3:in `require'
# /usr/local/bundle/gems/activesupport-7.0.2/lib/active_support/core_ext/array/conversions.rb:3:in `<top (required)>'
...

Gemfile.lock

specs:
    activesupport (7.0.2)
      concurrent-ruby (~> 1.0, >= 1.0.2)
      i18n (>= 1.6, < 2)
      minitest (>= 5.1)
      tzinfo (~> 2.0)
      zeitwerk (~> 2.3)
# ...
    grape (1.6.2)
      activesupport
      builder
      dry-types (>= 1.1)
      mustermann-grape (~> 1.0.0)
      rack (>= 1.3.0)
      rack-accept

…

Potential fix

Shouldn’t constant ActiveSupport::XmlMini::IsolatedExecutionState be ActiveSupport::IsolatedExecutionState as found in xml_mini.rb?

Temporary solution on our place

We have forced our Gemfile to contain active_support fixed to working version 6.1. This is a workaround, as we are adding a dependency we are not using in our own codebase, but as a subdependency.