サンプル

Sinatra 4 removes the IndifferentHash initializer that merged a hash argument, silently producing an empty hash with the argument as the default value instead

sha256:505354b2db0a9e15b3c1720605ee174c820a6c6345acea3e8f620bc078351ab0

ケース

ゴール

Sinatra 4 removes the IndifferentHash initializer that merged a hash argument, silently producing an empty hash with the argument as the default value instead HOW

パッケージ

sinatra 4.2.1

環境

ruby

作成日

2026-08-16T17:07:41Z

よくある思い込み

Sinatra::IndifferentHash.new({"role" => "admin"}) produces a populated hash where the string and symbol keys both resolve to "admin", matching the same pattern that worked in Sinatra 3

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• Sinatra::IndifferentHash.new({"role" => "admin", "id" => 7}) returns an empty hash of size 0 whose default value is the argument object, so ih["role"] returns the original seed hash rather than "admin" — the constructor no longer merges its argument in Sinatra 4
• ih.size == 0
• ih["role"] == seed_hash (returns default, not the value)
• ih[:role] == seed_hash (symbol access also returns the default)
• require 'rack/protection/encrypted_cookie' raises LoadError — EncryptedCookie was removed from rack-protection 4.x
• Rack::Protection.constants does not include :EncryptedCookie
• Sinatra::IndifferentHash['role', 'admin', 'id', 7] still populates the hash correctly — only .new(hash) is broken

ファイル

• Gemfile
• NOTES.md
• app.rb
• csx.json
• test/contract.rb

検証済みアーティファクトをダウンロード (tar.gz) — 契約が実行された正確なバイト列

オリジンシーダー

csx-seed

検証レシート

• ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-16 · ed25519:d91480838ac982c9