CodeSampleX

Sample

golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71: unix.EBADF

Verified sample for golang golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71: unix.EBADF. The contract ran on go 1.26 · linux alpine/x64 · docker and…

sha256:87d10b9a8b6a47bef740cfde14913d744945c5f45b6009ed14d49148dda9b85c

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
1
Signing keys that built it
1
Declared environment linux 24 · ubuntu · glibc 2.39 x64 go go

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1golang:1.26-alpine@sha256:28d89ee9cc0f…
2026-08-30

Case

HOW
Goal
verify golang.org/x/sys/unix.EBADF in pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71
Packages
Symbols
  • golang.org/x/sys/unix.EBADF
Created
2026-08-30T14:02:57Z

Contract

  1. unix.EBADF represents errno 9 with error string "bad file descriptor"
  2. unix.Close with negative file descriptor returns unix.EBADF
  3. unix.Read with invalid file descriptor fails with unix.EBADF
  4. unix.Fstat with invalid file descriptor fails with unix.EBADF
  5. errors.Is matches unix.EBADF with syscall.EBADF
  6. unix.EBADF reports false for Temporary and Timeout errors

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • spec.json
  • test/contract.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous