Bug #21798: `bundle install` command fails if touches `$LOAD_PATH` on `Ruby::Box` enabled

• Status: Open
• Assignee: -
• Target version: -
• ruby -v: 4.0.0-preview3
• Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[unasuke (Yusuke Nakamura)]

How to reproduce

FROM ruby:4.0.0-preview3-trixie

WORKDIR /ruby_box_test

RUN bundle gem foo --test=minitest
WORKDIR /ruby_box_test/foo

RUN head -n 10 foo.gemspec

# PASS
RUN bundle install

# PASS
RUN RUBY_BOX=1 bundle install

RUN sed --in-place \
  --expression='2i lib=File.expand_path("../lib", __FILE__)\n$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)' \
  foo.gemspec
RUN sed --in-place \
  --expression='s/require_relative "lib\/foo\/version"/require "foo\/version"/' \
  foo.gemspec
RUN head -n 10 foo.gemspec

# PASS
RUN bundle install

# FAIL
RUN RUBY_BOX=1 bundle install

This script fails.

/usr/local/bin/ruby: warning: Ruby::Box is experimental, and the behavior may change in the future!
See doc/language/box.md for known issues, etc.

[!] There was an error while loading `foo.gemspec`: cannot load such file -- foo/version. Bundler cannot continue.

 #  from /ruby_box_test/foo/foo.gemspec:5
 #  -------------------------------------------
 #  
 >  require "foo/version"
 #  
 #  -------------------------------------------
Error: building at STEP "RUN RUBY_BOX=1 bundle install": while running runtime: exit status 14

Head of the gemspec file is this.

# frozen_string_literal: true
lib=File.expand_path("../lib", __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require "foo/version"

Gem::Specification.new do |spec|
  # ..snip..
end

misc

I found this behavior when RUBY_BOX=1 bundle exec rake spec on https://github.com/itamae-kitchen/itamae.