before_type_castの返り値の型が変わった原因調査用スクリプト

bisect.sh

$ git bisect start main v7.0.6
Bisecting: a merge base must be tested
[2b6182cbd68231ed2a26417e3184c3d8ed21c57a] Merge pull request #43764 from eileencodes/fix-name-of-method

$ git bisect run ruby issue.rb

...

Finished in 0.003305s, 302.5719 runs/s, 302.5719 assertions/s.
1 runs, 1 assertions, 1 failures, 0 errors, 0 skips
38141681cc66e8ecd3035b4488e4a21775d635a3 is the first bad commit
commit 38141681cc66e8ecd3035b4488e4a21775d635a3
Author: eileencodes <eileencodes@gmail.com>
Date:   Tue May 9 11:19:12 2023 -0400

    Revert "Merge pull request #46444 from eileencodes/revert-forgetting-assignment-changes"

    This reverts commit 586436d370126322a1470c10c1fde73cf8dc8875, reversing
    changes made to 866e053732636e64685a72e22d76e7988d06a000.

    This is an unrevert of https://github.com/rails/rails/pull/46282. I
    should have reverted the revert sooner but it kept falling off my radar.

    Closes #46446

 activemodel/lib/active_model/attribute.rb | 13 +++++++++++++
 1 file changed, 13 insertions(+)
bisect found first bad commit

issue.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"
  gem "rails", path: "."
  gem 'sqlite3'
end

require "active_record"
require "minitest/autorun"
require "logger"

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts, force: true do |t|
    t.integer :foo, default: 1
  end
end

class Post < ActiveRecord::Base
  enum foo: { x: 1, y: 2 }
end

class BugTest < Minitest::Test
  def test_foo
    post = Post.create!

    assert_equal 1, post.foo_before_type_cast
    #=> 1    (v7.0.6)
    #=> "1"  (v7.1.0)
  end
end