REGRESSION residual: class-expression static-method default-param/destructuring — 11 fails (#5662)

[proggeramlug]

Current state — 11 failing. Snapshot from the 2026-06-27 full sweep (perry 0.5.1206, node v26.3.0). This supersedes the original body; the complete current failing-test list is inline below — no re-run needed to start.

Residual of the #5662 class-expression regression (mostly fixed in the 06-27 batch). Remaining: is not iterable on array-destructuring default params + static-dflt edge cases, language/expressions/class only.

Failure reasons

n	reason
4	Test262:AsyncTestFailure:TypeError: Cannot read properties of undefine
4	Test262:AsyncTestFailure:Test262Error: throw-arg-1
2	Test262:AsyncTestFailure:Test262Error: Test262Error: Promise incorrect
1	TypeError: value is not a function

All 11 failing tests (path — reason)

full list — click to expand

language/expressions/class/async-gen-method-static/yield-star-async-return.js    Test262:AsyncTestFailure:TypeError: Cannot read properties of undefined (reading 'name')
language/expressions/class/async-gen-method-static/yield-star-async-throw.js    Test262:AsyncTestFailure:Test262Error: throw-arg-1
language/expressions/class/async-gen-method-static/yield-star-next-non-object-ignores-then.js    Test262:AsyncTestFailure:Test262Error: Test262Error: Promise incorrectly fulfilled.
language/expressions/class/async-gen-method-static/yield-star-sync-return.js    Test262:AsyncTestFailure:TypeError: Cannot read properties of undefined (reading 'name')
language/expressions/class/async-gen-method-static/yield-star-sync-throw.js    Test262:AsyncTestFailure:Test262Error: throw-arg-1
language/expressions/class/elements/async-gen-private-method-static/yield-star-async-return.js    Test262:AsyncTestFailure:TypeError: Cannot read properties of undefined (reading 'name')
language/expressions/class/elements/async-gen-private-method-static/yield-star-async-throw.js    Test262:AsyncTestFailure:Test262Error: throw-arg-1
language/expressions/class/elements/async-gen-private-method-static/yield-star-next-non-object-ignores-then.js    Test262:AsyncTestFailure:Test262Error: Test262Error: Promise incorrectly fulfilled.
language/expressions/class/elements/async-gen-private-method-static/yield-star-sync-return.js    Test262:AsyncTestFailure:TypeError: Cannot read properties of undefined (reading 'name')
language/expressions/class/elements/async-gen-private-method-static/yield-star-sync-throw.js    Test262:AsyncTestFailure:Test262Error: throw-arg-1
language/expressions/class/scope-static-setter-paramsbody-var-open.js    TypeError: value is not a function

Reproduce

scripts/test262_subset.py --root vendor/test262 --dir language/expressions/class --jobs 6

Each path above is under vendor/test262/test/. Assemble harness + case the way the runner does (see test-compat/test262/README.md) to run one under perry compile directly.

[proggeramlug]

Re-measure 2026-06-27 (main @ 393af3c): mostly fixed — class-expression static-method default-param/destructuring cluster ~61 → 10. expressions/class total back to 73; #5592 class tail recovered 295 → 230. Remaining 10 are the residual is not iterable / static-dflt edge cases.

[proggeramlug]

Worker finding (PR #5744): the setter case is fixed (11 → 10), but the remaining 10 are mis-scoped — they are not the #5662 class-expression regression. They are async-generator yield* delegation dropping .return()/.throw() abrupt resume, which reproduces identically for class statements, plain async function*, and instance methods. Split into a dedicated issue: #5745. Once that lands, #5703 closes. PR #5744 (class setter default-param prologue) is the only genuine class-expression residual.