[Bug Report] bundler: failed to load command: packwerk

Description
After upgrading to Ruby 3.0, we started getting this kind of errors:

......................bundler: failed to load command: packwerk (/runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/bin/packwerk)
/runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:86:in `rescue in work': Parallel::DeadWorker (Parallel::DeadWorker)
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:83:in `work'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:482:in `block (4 levels) in work_in_processes'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:597:in `with_instrumentation'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:481:in `block (3 levels) in work_in_processes'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:469:in `loop'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:469:in `block (2 levels) in work_in_processes'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:222:in `block (4 levels) in in_threads'
/runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/activesupport-6.1.7.3/lib/active_support/core_ext/marshal.rb:8:in `load': end of file reached (EOFError)
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/activesupport-6.1.7.3/lib/active_support/core_ext/marshal.rb:8:in `load'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:84:in `work'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:482:in `block (4 levels) in work_in_processes'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:597:in `with_instrumentation'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:481:in `block (3 levels) in work_in_processes'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:469:in `loop'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:469:in `block (2 levels) in work_in_processes'
	from /runner/_work/app/app/backend/vendor/bundle/ruby/3.0.0/gems/parallel-1.22.1/lib/parallel.rb:222:in `block (4 levels) in in_threads'

It happens a bit randomly and we cannot debug it, but maybe you have some clues with the stacktrace. Packwerk runs for most of the app, but suddenly bundler says it cannot find the command and halts.

To me, Parallel::DeadWorker and the end of file reached (EOFError) lines seem to most relevant, but I don't have enough knowledge about packwerk internals to understand what might be the issue.

To Reproduce
None, sadly :(

Expected Behaviour
bundler should be able to find the command.

Screenshots
If applicable, add screenshots to help explain your problem.

Version Information

• Packwerk: v3.0.1
• Ruby 3.0.2

Additional Context
None

Start with the reported Parallel::DeadWorker and EOFError traces in parallel-1.22.1 and Active Support 6.1.7.3 under Ruby 3.0.2 and Packwerk 3.0.1; the report provides no reproduction, so first determine reliable reproduction conditions. Done means identifying the cause of the intermittent command failure and documenting or testing a fix that prevents Packwerk from halting.