test262 remaining failures — single worklist (1,543 cases @ 95.8%, grind to 100%)

[proggeramlug]

Single worklist for the entire remaining test262 gap

1,543 failing cases · parity 95.8% (snapshot: 2026-06-30 full sweep, perry 0.5.1208, node v26.3.0). This is a self-contained umbrella so one worker can grind the whole tail without re-measuring — every current failing case (path → reason) is enumerated in the linked worklist.

📋 Complete worklist (all 1,543 cases, grouped by area)

https://gist.github.com/proggeramlug/fd9092312edbdeeda2a61711cc954fcc

That gist is the worklist. Each area section has a count, a reason histogram, and the full list of failing test paths with their failure reason. Work area-by-area; pick the cluster with the clearest single root.

Setup (any box)

git clone https://github.com/PerryTS/perry && cd perry
cargo build --release -p perry -p perry-runtime-static -p perry-stdlib-static
git clone --depth 1 https://github.com/tc39/test262 vendor/test262   # checkout test-compat/test262/pinned-sha.txt
# node on PATH (the differential oracle). See test-compat/test262/README.md.

Measure / verify any slice:

scripts/test262_subset.py --root vendor/test262 --dir <area> --jobs 8

The .failures.txt sidecar lists every failing case; diff before/after to confirm zero regressions.

Biggest pools (full per-area breakdown in the gist; 82 areas total)

Cases	Area (--dir)	Notes
338	language/expressions	mostly expressions/class; bulk is async-gen yield* — overlaps #5745, scope to non-async-gen
229	language/statements	mostly statements/class; same async-gen caveat
91	built-ins/RegExp	property-escapes \p{Script_Extensions}, v-flag (unimpl), exec internals
62	intl402/NumberFormat	formatToParts/notation/rounding/validation
61	built-ins/Array	exotic length/index, non-array receivers
51	intl402/DateTimeFormat	option-validation + formatRange
44	built-ins/Object	ToObject/assign/descriptors (overlaps #3986)
38	built-ins/Promise	real class X extends Promise subclass support
38	built-ins/String	non-generic receivers, normalize
37	intl402/Temporal	Temporal.toLocaleString formatting edges
33	built-ins/Proxy	invariant checks
30	language/eval-code	Annex B.3.3 global-eval hoisting (partly a genuine AOT limit)
23 each	annexB/language, built-ins/Function, built-ins/JSON
20	intl402/Segmenter
…	(Intl/RelativeTimeFormat, TypedArrayConstructors, Collator, Date, Locale, Temporal self-validate, …)	see gist

How to work it

1. Pick an area from the gist (start with a coherent single-root subcluster, not the whole area).
2. Localize with cargo run --release -- file.ts --trace hir --focus <fn> / --trace llvm.
3. Fix; verify the listed cases pass and re-run the slice for zero regressions.
4. Code-only PR per area/subcluster: no Cargo.toml/Cargo.lock version bump, no CLAUDE.md Current-Version edit, no CHANGELOG entry (maintainer folds metadata at merge). cargo fmt --all -- --check and bash scripts/check_file_size.sh must pass (keep files < 2000 lines; split topically if needed).
5. Reference this issue in each PR. Never reference internal infrastructure hostnames in commits/PRs/docs.

Relationship to existing tickets

Consolidates the per-area tails: open #5592 #5591 #5582 #5588 #5590 #5579 #5587, and the closed-but-residual #5586 #5581 #5589 #5580 #5800. (#5735 / #5745 are owned separately — the async-gen yield* class cases belong to #5745, leave them.)

Refresh the worklist by re-running the full sweep (--dir built-ins language intl402 annexB) and regenerating the gist; not required to start.

[proggeramlug]

Superseded by self-contained per-area worklist tickets — each has the complete current failing-test list inline (2026-07-01 sweep), so an agent can open one and work immediately (no history, no re-measure):

#5832 language/class · #5833 language-misc · #5834 built-ins-misc · #5835 intl-small · #5836 RegExp · #5837 NumberFormat · #5838 Array · #5839 Temporal · #5840 DateTimeFormat · #5841 eval-code · #5842 Object · #5843 String · #5844 Proxy · #5845 intl402-misc · #5846 Function · #5847 JSON · #5848 annexB-misc · #5849 Promise.