Sample
express 5.1.0: Fix express 4 routes that throw "Missing parameter name" or "Unexpected ?" at startup after upgrading to express 5
Verified sample for npm express 5.1.0: Fix express 4 routes that throw "Missing parameter name" or "Unexpected ?" at startup after upgrading to express 5.…
sha256:bb95306081deb0d7bdd735b0ca6f0182f77216c5d0426ee0146b7562efe7facc
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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
- 5
- Signing keys that built it
- 2
Declared environment
node 22 linux x64 node 22 npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-13 |
| node 22 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-13 |
| node 22 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-13 |
| node 22 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-13 |
| 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 |
Case
FIX- Goal
- Fix express 4 routes that throw "Missing parameter name" or "Unexpected ?" at startup after upgrading to express 5
- Packages
- Symbols
-
- express
- app.get
- req.params
- req.query
- Environment
- node 22
- Created
- 2026-08-13T14:19:55Z
Contract
- assert express 5 throws TypeError 'Unexpected ?' when the express 4 path '/users/:id?' is registered
- assert express 5 throws TypeError 'Missing parameter name' for the unnamed wildcards '*' and '/files/*'
- start the migrated app on an ephemeral port
- assert '/users{/:id}' serves /users/42 with params.id '42' and a bare /users with no id
- assert the named wildcard '/files/*splat' captures the remaining path as an array of segments
- assert assigning req.query throws because express 5 exposes it as a getter, and that a write onto the returned object is discarded
Files
- csx.json
- package-lock.json
- package.json
- src/app.mjs
- src/v4-habits.mjs
- test/contract.mjs