Sample
github.com/google/go-cmp 0.7.0: Compare standard and wrapped Go error values using cmpopts.EquateErrors and cmpopts.AnyError without unexported field panics
Verified sample for golang github.com/google/go-cmp 0.7.0: Compare standard and wrapped Go error values using cmpopts.EquateErrors and cmpopts.AnyError…
sha256:b421c44da3563ef4765212fe5a7828c46526f7b252f204d8fed310800c9e9e0b
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
go linux x64 go go gomod
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-17 |
| go 1.26 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-18 |
Case
HOW- Goal
- Compare standard and wrapped Go error values using cmpopts.EquateErrors and cmpopts.AnyError without unexported field panics
- Packages
- Symbols
-
- cmp.Diff
- cmp.Equal
- cmpopts.EquateErrors
- cmpopts.AnyError
- Environment
- go
- Created
- 2026-08-17T20:00:01Z
Contract
- Comparing standard error values without cmpopts.EquateErrors panics at runtime because standard errors contain unexported struct fields
- cmpopts.EquateErrors evaluates equality via errors.Is so separate errors.New instances with identical messages evaluate as unequal
- cmpopts.EquateErrors matches wrapped errors created with fmt.Errorf to their underlying sentinel target
- cmpopts.AnyError matches any non-nil error under cmpopts.EquateErrors while strictly rejecting nil errors
- cmp.Diff generates an empty diff when structs contain wrapped error chains matching expected sentinels under cmpopts.EquateErrors
Files
- NOTES.md
- csx.json
- errorcmp.go
- errorcmp_test.go
- go.mod
- go.sum