warning: IO::Buffer is experimental

[emiltin]

Hi, When using the async gem with Ruby 3.2.2 on macOS, I get this warning:

/Users/emiltin/.local/share/rtx/installs/ruby/3.2.2/lib/ruby/gems/3.2.0/gems/io-event-1.3.2/lib/io/event/support.rb:24: warning: IO::Buffer is experimental and both the Ruby and C interface may change in the future!

This seems to come from the Ruby stdlib, but is there anyway to avoid it at the momemt?

[ioquatix]

This warning is pointing out that io-event could potentially break on a future version of Ruby. However, that is unlikely to occur in practice as the impact would be pretty big.

I hope to finish IO::Buffer by Ruby 3.3 so the warning will be removed when that happens.

In terms of removing the warning before that, we could probably silence it, but I suppose that defeats the purpose of the warning.

[emiltin]

Thank you for the info! I agree, silencing the warning would not be a good idea. I was wondering if it was perhaps an issue with my installation, but I'll just leave the warning be.

[trevorturk]

FWIW I silenced with a Ruby version check so I'll remember to check again later, like so:

Kernel.silence_warnings do
  raise("check IO::Buffer warning") unless RUBY_VERSION == "3.2.2"
  Bundler.require(*Rails.groups)
end

Please don't be mad at me, I know it's bad form! 😉

[kmcphillips]

A softer approach than silencing all warnings, you can suppress just the experimental ones:

original, Warning[:experimental] = Warning[:experimental], false
Bundler.require(*Rails.groups)
Warning[:experimental] = original

Or use the ruby -W:no-experimental flag at runtime.

[ioquatix]

If you are running on Ruby 3.3, this warning should no longer be emitted:

https://github.com/socketry/io-event/commit/0ebd3c01b2f4665930215a1d47d45200799d97e2#diff-cc36f5f34855b6bba9affc5bbc47b7a56d0c352e09704260126cec991843aa72R23