Issues

• Array reduce: accumulator narrower than the callback's or initial value's runtime type, and arguments.length in the callback

  vercel-labs/scriptc#1628 · Filter by author ejc3 opened on Oct 21, 2026

• Compound assignment through a non-null assertion on an element is refused (SC1090)

  vercel-labs/scriptc#1625 · Filter by author ejc3 opened on Oct 21, 2026

• Generic arrow declared inside a function is refused even when it captures nothing (SC1090)

  vercel-labs/scriptc#1624 · Filter by author ejc3 opened on Oct 21, 2026

• Empty array filled by push of records is typed number[] inside a function (SC2002)

  vercel-labs/scriptc#1623 · Filter by author ejc3 opened on Oct 21, 2026

• Typed-array write refused when the index comes from for...of over an array that may have holes (SC1090)

  vercel-labs/scriptc#1622 · Filter by author ejc3 opened on Oct 21, 2026

• Typed array reduce and reduceRight have no lowering (SC2020)

  vercel-labs/scriptc#1620 · Filter by author ejc3 opened on Oct 21, 2026

• WeakMap and WeakSet operations scan every entry, so filling one is quadratic

  vercel-labs/scriptc#1619 · Filter by author ejc3 opened on Oct 21, 2026

• Preserve the known rejection reason for discovered but untranslated WASM modules

  vercel-labs/scriptc#1617 · Filter by author jlucaso1 opened on Oct 21, 2026

• Accept file URL paths in readFileSync

  vercel-labs/scriptc#1616 · Filter by author jlucaso1 opened on Oct 21, 2026

• Support fs.promises.rm options already handled by rmSync

  vercel-labs/scriptc#1615 · Filter by author jlucaso1 opened on Oct 21, 2026

• Test262 survey (static-adapted-v5): per-chapter results on main vs integration branch

  vercel-labs/scriptc#1472 · Filter by author cramforce opened on Oct 20, 2026

• http.Server: 'connect' (and 'upgrade') events not available

  vercel-labs/scriptc#1439 · Filter by author saboursepideh opened on Oct 20, 2026

• Uint8Array.of (TypedArray.of) not supported: SC1090

  vercel-labs/scriptc#1440 · Filter by author saboursepideh opened on Oct 20, 2026

• ICE SC9001 "bytesSet on non-bytes union" compiling @noble/hashes sha256 (HashMD.digestInto)

  vercel-labs/scriptc#1437 · Filter by author saboursepideh opened on Oct 20, 2026

• node:crypto: no asymmetric keys/signing (generateKeyPairSync, sign), X509Certificate fields, or globalThis.crypto.subtle

  vercel-labs/scriptc#1441 · Filter by author saboursepideh opened on Oct 20, 2026

• node:tls: SNICallback, new tls.TLSSocket(socket, {isServer}), and ALPNProtocols not supported

  vercel-labs/scriptc#1438 · Filter by author saboursepideh opened on Oct 20, 2026

• Performance issue when compiling an object literal with a computed key (workaround 148x faster)

  vercel-labs/scriptc#1409 · Filter by author ainslec opened on Oct 19, 2026

• Perf issue storing a dictionary into a record's nested dictionary under a computed key (workaround 144x faster)

  vercel-labs/scriptc#1408 · Filter by author ainslec opened on Oct 19, 2026

• No SIMD emitted for typed-array dot-product / MAC loops (0 vector instructions in a 431 KB A64 binary)

  vercel-labs/scriptc#1388 · Filter by author croissantsam opened on Oct 19, 2026

• Global isFinite with a checker-unknown argument refuses with SC2012 (valid JS: ToNumber then NaN test)

  vercel-labs/scriptc#1386 · Filter by author espetro opened on Oct 19, 2026

• Compiler panics when compiling zod >= 4.5.0: 'null is not representable in the target union'

  vercel-labs/scriptc#1376 · Filter by author hangtiancheng opened on Oct 19, 2026

• Support Object.freeze / Object.isFrozen on native records passed through unknown (SC2020)

  vercel-labs/scriptc#1374 · Filter by author blurname opened on Oct 19, 2026

• Optional-parameter callback rejected inside a generic object method, but accepted in a generic function

  vercel-labs/scriptc#1373 · Filter by author blurname opened on Oct 19, 2026

• Support structural constructor return types with static members

  vercel-labs/scriptc#1372 · Filter by author blurname opened on Oct 19, 2026

• Clarify compilation pipeline stages, partition thresholds, and build performance in documentation

  vercel-labs/scriptc#1340 · Filter by author espetro opened on Oct 18, 2026