Sample
Show that the parser bundled with @babel/core 7.29.6 rejects `new super()` instead of returning transformed output.
sha256:2c75f030a154cfccd189ac23e01f59a8adaf038a3d2653278fb0cdddfe70b2a1
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Show that the parser bundled with @babel/core 7.29.6 rejects `new super()` instead of returning transformed output. HOW
- Packages
- @babel/core 7.29.6
- Environment
- node
- Created
- 2026-08-17T03:13:57Z
Commonly assumed
A model would likely expect Babel to treat `new super()` like a standard callable super-expression form and return transpiled output instead of throwing.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- `transformSync` does not return transformed code for `class A extends class {} { constructor() { new super() } }`; it throws a syntax error for this invalid `new super()` form.
- assert.throws(() => transformSync('class A extends class {} { constructor() { new super() } }', { configFile: false, babelrc: false }), SyntaxError)
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9