Sample
sorbet-runtime 0.6.13427: Show that T::Struct.from_hash bypasses the runtime type enforcement that the .new constructor applies
Verified sample for gem sorbet-runtime 0.6.13427: Show that T::Struct.from_hash bypasses the runtime type enforcement that the .new constructor applies. The…
sha256:49b3a0ec0dc911830c4cf62df5ff6bb54e1006a59d4d7830a843495fc1ee8400
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
- Show that T::Struct.from_hash bypasses the runtime type enforcement that the .new constructor applies
- Packages
- Symbols
-
- T::Struct
- T::Props
- T::Props::ClassMethods#from_hash
- Environment
- ruby
- Created
- 2026-08-17T02:49:00Z
Contract
- T::Struct.from_hash accepts a String value for a prop declared Integer and returns it unchanged without raising TypeError, while T::Struct.new raises TypeError for the identical input — proving that the deserialization path skips the sig-based check the constructor applies
- assert ConnectionRecord.from_hash('port' => '5432').port == '5432'
- assert ConnectionRecord.new(port: '5432') raises TypeError matching /Can't set ConnectionRecord\.port/
- assert from_hash with an unknown string key silently discards it rather than raising
- assert from_hash with symbol keys treats them as absent and raises RuntimeError about nil deserialization
- assert from_hash with Integer elements inside a T::Array[String] prop returns them unchanged — element types are not checked
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- src/model.rb
- test/contract.rb