Sample
set 1.1.1: Recover stale Set membership after a mutable element changes its hash
Verified sample for gem set 1.1.1: Recover stale Set membership after a mutable element changes its hash. The contract ran on ruby 3 · linux debian/x64 …
sha256:c3ebad077aa01c12e583e57f127c53912b03d9730d22c45a627de462968ed9b7
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
- 2
Declared environment
ruby linux x64 ruby ruby bundler
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-17 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Recover stale Set membership after a mutable element changes its hash
- Packages
- Symbols
-
- Set#include?
- Set#delete?
- Set#reset
- Environment
- ruby
- Created
- 2026-08-17T02:47:22Z
Contract
- After an element's hash changes, Set#include? returns false while Set#delete? returns nil and the stale entry still counts toward Set#size.
- Set#reset rebuilds the backing hash so membership works again and Set#delete? can remove the element.
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- test/contract.rb