tetsuharuohzeki

Summary

Works exclusively in JavaScriptCore, concentrated on spec conformance for built-ins: Iterator helpers (`Iterator.prototype.includes`, IteratorClose error propagation, tc39/ecma262 follow-ups) and TypedArray/DataView construction paths, much of it driven by test262 failures. No commits classified as security fixes or hardening, but the DataView work repeatedly lands on argument-validation ordering and detached-buffer handling — splitting DataView construction out of the shared TypedArray path, and fixing `new DataView(buffer, byteOffset, byteLength)` step ordering along with a detaching-during-construction test262 case. Systematic-variant candidate: the reordering of validation steps around detach-capable buffers in the newly separated DataView construction path, plus the iterator-next-with-detached cases, where side effects from user callbacks can run between bounds checks and buffer access.

Components

Security Fix History

• No security fixes recorded

Hardening Commits

• No hardening commits recorded

Recent Commits

• 2026-07-29 [JSC] Enable `Iterator.prototype.includes()`
• 2026-07-22 [JSC] Use pass-by-value for `resultIndex` argument of `JS::fastFlatIntoBuffer()`
• 2026-07-21 [JSC] Iterator#includes should propagate a thrown error in |IteratorClose| abstract operation on matching the target val
• 2026-07-01 [JSC] test262 fail: test/built-ins/TypedArrayConstructors/ctors/typedarray-arg/throw-type-error-before-custom-proto-acce
• 2026-06-16 [JSC] Update iterator built-ins to reflect the change of github:tc39/ecma262#3776
• 2026-06-02 [JSC] Iterator.prototype.inclues should throw RangeError if skippedElements > Number.MAX_SAFE_INTEGER
• 2026-05-18 [JSC] test 262 fail: test/staging/sm/TypedArray/constructor-buffer-sequence.js
• 2026-05-10 [JSC] `new DataView(buffer, byteOffset, byteLength)` should compliant the step 9-b of `25.3.2.1 DataView` abstract opera
• 2026-05-07 [JSC] Split DataView construction step into a separated code path from other TypedArrays
• 2026-05-03 [JSC] Split DataView construction step into a separated code path from other TypedArrays
• 2026-04-25 [JSC] Adopt truncate-double-to-int infrastructure more in ArrayPrototype.cpp
• 2026-04-21 [JSC] Promise.prototype.finally should throw in `SpeciesConstructor(promise, %Promise%)` abstract step properly before i
• 2026-04-14 [JSC] test262 failure: test/staging/sm/extensions/DataView-construct-arguments-detaching.js
• 2026-04-08 [JSC] Implement `Iterator.prototype.includes` (disabled by default)
• 2026-03-31 [JSC] Fix test262 failure: test/staging/sm/TypedArray/iterator-next-with-detached.js