Issue #21828 has been updated by Eregon (Benoit Daloze). Status changed from Closed to Open Re-opening since it's still a problem on master and on 4.0.1, so the fix doesn't seem to work. Another reproduction from https://github.com/evanphx/benchmark-ips/pull/148 is: ``` git clone git@github.com:evanphx/benchmark-ips.git cd benchmark-ips bundle bundle exec rake ``` which gives: ``` /home/eregon/code/benchmark-ips/test/test_benchmark_ips.rb:2: warning: benchmark/ips is found in benchmark, which is not part of the default gems since Ruby 4.0.0. You can add benchmark to your Gemfile or gemspec to fix this error. ... ``` ---------------------------------------- Bug #21828: An incorrect warning message related to `benchmark` is shown when using `benchmark-ips` https://bugs.ruby-lang.org/issues/21828#change-116666 * Author: y-yagi (Yuji Yaginuma) * Status: Open * Assignee: hsbt (Hiroshi SHIBATA) * ruby -v: ruby 4.0.1 (2026-01-13 revision e04267a14b) +PRISM [x86_64-linux] * Backport: 3.2: DONTNEED, 3.3: DONTNEED, 3.4: DONTNEED, 4.0: DONE ---------------------------------------- ## Descrition When using `benchmark-ips` gem with Ruby 4.0.0, the warning related to `benchmark` gem is shown. ## Step to reproduce ```ruby # Gemfile # frozen_string_literal: true source "https://rubygems.org" gem "benchmark-ips" ``` ```ruby # script.rb require "benchmark/ips" ``` ```text $ bundle exec ruby -v script.rb ruby 4.0.0 (2025-12-25 revision 553f1675f3) +PRISM [x86_64-linux] script.rb:1: warning: benchmark/ips is found in benchmark, which is not part of the default gems since Ruby 4.0.0. You can add benchmark to your Gemfile or gemspec to fix this error. ``` ## Expected behavior The warning for `benchmark` isn't shown when using `benchmark-ips`. -- https://bugs.ruby-lang.org/