Sample
thiserror 2.0.20: #[error(transparent)] forwards both Display and Error::source to the inner error rather than wrapping the inner error as the cause layer
Verified sample for cargo thiserror 2.0.20: #[error(transparent)] forwards both Display and Error::source to the inner error rather than wrapping the inner…
sha256:115c8c422a1ed72be811ab6ecb1f995940e32fd286cfe04c38e865c43df7feb6
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
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-17 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- #[error(transparent)] forwards both Display and Error::source to the inner error rather than wrapping the inner error as the cause layer
- Packages
- Symbols
-
- thiserror::Error
- Environment
- rust
- Created
- 2026-08-17T18:49:30Z
Contract
- Calling Error::source on an error deriving Error with #[error(transparent)] delegates directly to inner.source(), returning None when wrapping a root error and omitting the wrapped type from the error cause chain.
- Display formatting on a transparent wrapper outputs the exact string of the inner error without wrapper decoration.
- Standard #[error("...")] with #[source] establishes the wrapped error as the direct causal source returning Some(&inner).
- Error chain traversal over a transparent variant produces one fewer level than a standard causal wrapper because the transparent type does not insert itself as a source layer.
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs