Reproduction script for schema load error. Empty database called "issue_reproduction_development" is required. Full repo: https://github.com/skiningham/issue_reproduction

example.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 "activerecord", "5.0.2"
  gem "pg"
end

require "active_record"
require "active_record/schema_dumper"
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: "postgresql", database: "issue_reproduction_development", encoding: "utf8", pool: 5, timeout: 5000, host: "localhost")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :a_short_model_names do |t|
    t.string :title
    t.text :body

    t.timestamps
  end

  create_table :my_very_long_example_model_name_because_i_think_schema_load_breaks_sometimes do |t|
    t.string :title
    t.text :body

    t.timestamps
  end
end

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
end

class AShortModelName < ApplicationRecord
end

class MyVeryLongExampleModelNameBecauseIThinkSchemaLoadBreaksSometime < ApplicationRecord
end

class BugTest < Minitest::Test
  def test_schema_load
    filename = 'example_schema.rb'
    File.open(filename, "w:utf-8") do |file|
      ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, file)
    end

    load(filename)
  end
end