warning: method redefined; discarding old require

[MaxLap]

Running a rake test task with verbose set to true, outputs the warning ".../ruby-3.2.2@nagano3/gems/bootsnap-1.17.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:8: warning: method redefined; discarding old require"

Here is an example of such a setting

  Rake::TestTask.new(:quick_check) do |t|
    # ...
    t.verbose = true
  end

Launching a Rails console with RUBYOPT=-w also has the same warning.

I guess there could be race conditions if you first #undef the method. I wonder if you could turn this into a module that is #prepend to Kernel?

Bootsnap version: 1.17.0

Ruby version: 3.2.2

Rails version: 7.0.8

[byroot]

I wonder if you could turn this into a module that is #prepend to Kernel?

No it's not possible because rubygems uses a similar alias_method chain, and it doesn't mix well with prepend. Zeitwerk also alias method chain require, so we'd need to coordinate all this which is practically not possible.

In the meantime I can silence that warning using the alias_method trick:

module Kernel
  module_function

  alias_method :require, :require
  class << self
    alias_method :require, :require
  end

  def require(path)
  end
end

It's just weird I never noticed that warning before.

[MaxLap]

Understood, thanks for taking the time to explain!