Sample
bun 1.3.14: Demonstrate that FileSink.write() silently drops data without throwing when called after end()
Verified sample for npm bun 1.3.14: Demonstrate that FileSink.write() silently drops data without throwing when called after end(). The contract ran on node…
sha256:c1c480ed510e810ccbaf4d54ffc634d50cbd65350d75dd816b669716d0080ae7
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
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Demonstrate that FileSink.write() silently drops data without throwing when called after end()
- Packages
- Symbols
-
- Bun.file
- Environment
- node
- Created
- 2026-08-17T03:51:34Z
Contract
- const file = Bun.file('data.bin');
- const writer = file.writer();
- writer.end();
- const res = writer.write('A');
- assert.strictEqual(res, true, 'write() on a closed FileSink returns true rather than throwing an error');
- assert.strictEqual(await file.text(), '', 'Data written after end() is silently discarded');
Files
- csx.json
- package-lock.json
- package.json
- test/bun-binary.mjs
- test/contract.mjs