28718.rb

begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

gemfile(true) do
  source "https://rubygems.org"
  # Activate the gem you are reporting the issue against.
  gem 'rails', github: 'rails/rails', branch: 'master'
  gem "sqlite3"
end

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

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# 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 :users do |t|
    t.string :name
  end
end

class User < ActiveRecord::Base
end

Test = Struct.new(:name)

class BugTest < Minitest::Test
  def test_with_ar_class
    name = 'Vishal'
    assert_equal false, name.frozen?
    user = User.new(name: name)
    user.inspect
    assert_equal false, name.frozen?
  end

  def test_with_ruby_class
    name = 'Vishal'
    assert_equal false, name.frozen?
    user = Test.new(name: name)
    user.inspect
    assert_equal false, name.frozen?
  end
end