Sample
sinatra 4.2.1: Sinatra 4 removes the IndifferentHash initializer that merged a hash argument, silently producing an empty hash with the argument as the default value instead
Verified sample for gem sinatra 4.2.1: Sinatra 4 removes the IndifferentHash initializer that merged a hash argument, silently producing an empty hash with…
sha256:505354b2db0a9e15b3c1720605ee174c820a6c6345acea3e8f620bc078351ab0
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 1
Declared environment
ruby linux x64 ruby ruby bundler
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-16 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | SKIPPED | compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Sinatra 4 removes the IndifferentHash initializer that merged a hash argument, silently producing an empty hash with the argument as the default value instead
- Packages
- Symbols
-
- Sinatra::IndifferentHash
- Sinatra::IndifferentHash.new
- Rack::Protection::EncryptedCookie
- Environment
- ruby
- Created
- 2026-08-16T17:07:41Z
Contract
- 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
Files
- Gemfile
- NOTES.md
- app.rb
- csx.json
- test/contract.rb