Sample
collection 1.19.1: Handle invalid keys in CanonicalizedMap when isValidKey is configured
Verified sample for pub collection 1.19.1: Handle invalid keys in CanonicalizedMap when isValidKey is configured. The contract ran on dart 3 · linux…
sha256:e0368138deaa5543fd8c32462b0bf325847128438b1e712d85acb689585e8feb
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
dart linux x64 dart dart pub
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| dart 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-16 |
| dart 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-18 |
Case
HOW- Goal
- Handle invalid keys in CanonicalizedMap when isValidKey is configured
- Packages
- Symbols
-
- CanonicalizedMap
- Environment
- dart
- Created
- 2026-08-17T02:04:25Z
Contract
- CanonicalizedMap operator []= silently discards assignments for keys rejected by isValidKey without throwing an ArgumentError, leaving map length at 0 and containsKey returning false.
- CanonicalizedMap operator [] returns null and containsKey returns false for invalid keys without executing the canonicalize callback.
- CanonicalizedMap putIfAbsent bypasses isValidKey validation entirely, incrementing length to 1 and storing the value in values while operator [] and containsKey continue to report the key as absent.
- CanonicalizedMap remove on an invalid key returns null and fails to delete entries previously inserted through putIfAbsent from the underlying storage.
- CanonicalizedMap addAll silently filters out invalid keys while inserting valid keys, and update throws ArgumentError for a missing key rather than rejecting an invalid key.
Files
- NOTES.md
- csx.json
- pubspec.lock
- pubspec.yaml
- test/contract.dart