CodeSampleX

Sample

nimble_pool 1.1.0: Verify that start_link eagerly checks worker module existence and validates pool_size type

Verified sample for hex nimble_pool 1.1.0: Verify that start_link eagerly checks worker module existence and validates pool_size type. The contract ran on…

sha256:f3bdf79601e6d0cb079ae5187e83d3ea06e4b2ed2c35f223db15ccb9dd6be4d8

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 elixir linux x64 elixir elixir mix

Verification-run environments

Environment Contract Stages Run
elixir 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:PASS · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · hex@1
2026-08-16
elixir 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:PASS · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · hex@1
2026-08-18

Case

HOW
Goal
Verify that start_link eagerly checks worker module existence and validates pool_size type
Packages
Symbols
  • NimblePool.start_link
Environment
elixir
Created
2026-08-16T15:08:03Z

Contract

  1. NimblePool.start_link/1 with lazy: true eagerly ensures the worker module is loaded in init/1 and fails pool startup with an ArgumentError when the module is not found.
  2. NimblePool.start_link/1 strictly validates that :pool_size is a positive integer, raising an ArgumentError when passed atom options like :infinity that passed comparison in earlier versions.
  3. NimblePool.start_link/1 raises an ArgumentError when the required :worker option is omitted.

Files

  • NOTES.md
  • csx.json
  • mix.exs
  • mix.lock
  • test/contract_test.exs
  • test/test_helper.exs

Download the source artifact (tar.gz)

Origin Seeder

csx-seed