test262 intl402 small constructors — 101 (self-contained worklist)

[proggeramlug]

Self-contained worklist — 101 failing. Snapshot 2026-07-03 full sweep (perry 0.5.1218, node v26.3.0). Everything you need is in this issue; no history to read, no re-measure to start.

Intl Segmenter / RelativeTimeFormat / Collator / Locale / Intl / ListFormat / PluralRules / DisplayNames — mostly arg-validation + supported-locales + Collator collation. Crate: perry-stdlib (intl).

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 (differential oracle). See test-compat/test262/README.md.

Measure/verify: scripts/test262_subset.py --root vendor/test262 --dir intl402/Segmenter intl402/RelativeTimeFormat intl402/Collator intl402/Locale intl402/Intl intl402/ListFormat intl402/PluralRules intl402/DisplayNames --jobs 8 (the .failures.txt sidecar lists failures; diff before/after for zero-regression).

Failure reasons

n	reason
5	Uncaught exception: instanceof check - undefined
4	TypeError: Cannot convert undefined or null to object
4	Uncaught exception: Expected SameValue(«5», «3») to be
4	Uncaught exception: Expected SameValue(«"in 1,000 secon
3	Uncaught exception: Expected SameValue(«"art-lojban"»,
3	(no output)
3	Uncaught exception: Expected one call from true Expecte
3	Uncaught exception: Expected a TypeError to be thrown b
3	Uncaught exception: formatToParts(1000, second): length
2	Uncaught exception: Expected SameValue(«"undefined"», «
2	Uncaught exception: Actual [] and expected [en-US] shou
2	Uncaught exception: Expected SameValue(«"foo, bar"», «"

All 101 failing cases (path — reason)

intl402/Collator/ignore-invalid-unicode-ext-values.js    Uncaught exception: Locale en-US-u-co-standard is affected by key co; value stan
intl402/Collator/prototype/compare/compare-function-name.js    Uncaught exception: name descriptor value should be ; name value should be
intl402/Collator/prototype/compare/length.js    TypeError: Cannot convert undefined or null to object
intl402/Collator/prototype/compare/name.js    TypeError: Cannot convert undefined or null to object
intl402/Collator/prototype/compare/non-normative-basic.js    Uncaught exception: Actual [A, C, E, H, J, L, N, V, X, Z, b, d, f, g, i, k, m, w
intl402/Collator/prototype/compare/non-normative-phonebook.js    Uncaught exception: Actual [A, Ab, Af, b, od, off, Ä, ö] and expected [A, Ab, Ä,
intl402/Collator/prototype/compare/non-normative-sensitivity.js    Uncaught exception: Actual [Aa] and expected [Aa, aA, áÁ, Aã] should have the sa
intl402/Collator/prototype/compare/prop-desc.js    Uncaught exception: Expected SameValue(«"undefined"», «"function"») to be true
intl402/Collator/prototype/resolvedOptions/ignorePunctuation-default.js    Uncaught exception: Thai default ignorePunctuation to true Expected SameValue(«f
intl402/Collator/prototype/resolvedOptions/resolved-case-first-unicode-extensions-and-options.js    Uncaught exception: Resolved locale for locale=en-u-kf-lower with caseFirst=uppe
intl402/Collator/prototype/resolvedOptions/resolved-collation-unicode-extensions-and-options.js    Uncaught exception: Resolved collation for locale=de-u-co-phonebk with collation
intl402/Collator/prototype/resolvedOptions/resolved-numeric-unicode-extensions-and-options.js    Uncaught exception: Resolved locale for locale=en-u-kn-false with numeric=true E
intl402/Collator/unicode-ext-seq-with-attribute.js    Uncaught exception: Expected SameValue(«"de-u-co-phonebk"», «"de-u-attrval-co-ph
intl402/Collator/unicode-ext-value-collation.js    Uncaught exception: Collation for "invalid" should be default, but is invalid. E
intl402/Collator/usage-de.js    Uncaught exception: Actual [AE, Ä] and expected [Ä, AE] should have the same con
intl402/DisplayNames/locales-symbol-length.js    Uncaught exception: Actual [] and expected [length, 0] should have the same cont
intl402/DisplayNames/options-fallback-valid.js    Uncaught exception: instanceof check - undefined
intl402/DisplayNames/options-languagedisplay-valid.js    Uncaught exception: instanceof check - undefined
intl402/DisplayNames/options-localeMatcher-valid.js    Uncaught exception: instanceof check - undefined
intl402/DisplayNames/options-random-properties-unchecked.js    Uncaught exception: Expected true but got false
intl402/DisplayNames/options-style-valid.js    Uncaught exception: instanceof check - undefined
intl402/DisplayNames/options-type-valid.js    Uncaught exception: instanceof check - language
intl402/Intl/getCanonicalLocales/canonicalized-tags.js    Uncaught exception: Expected SameValue(«"cmn"», «"zh"») to be true
intl402/Intl/getCanonicalLocales/complex-language-subtag-replacement.js    Uncaught exception: Expected SameValue(«"sh"», «"sr-Latn"») to be true
intl402/Intl/getCanonicalLocales/complex-region-subtag-replacement.js    Uncaught exception: Expected SameValue(«"ru-SU"», «"ru-RU"») to be true
intl402/Intl/getCanonicalLocales/grandfathered.js    Uncaught exception: Expected SameValue(«"art-lojban"», «"jbo"») to be true
intl402/Intl/getCanonicalLocales/has-property.js    (no output)
intl402/Intl/getCanonicalLocales/locales-is-not-a-string.js    Uncaught exception: Actual [] and expected [en-US] should have the same contents
intl402/Intl/getCanonicalLocales/non-iana-canon.js    Uncaught exception: The value of Intl.getCanonicalLocales(tag)[0] equals the val
intl402/Intl/getCanonicalLocales/overriden-arg-length.js    Uncaught exception: Actual [] and expected [en-US] should have the same contents
intl402/Intl/getCanonicalLocales/preferred-grandfathered.js    Uncaught exception: Expected SameValue(«"art-lojban"», «"jbo"») to be true
intl402/Intl/getCanonicalLocales/preferred-variant.js    Uncaught exception: Expected SameValue(«"ja-Latn-hepburn-heploc"», «"ja-Latn-ala
intl402/Intl/getCanonicalLocales/returned-object-is-mutable.js    (no output)
intl402/Intl/getCanonicalLocales/transformed-ext-canonical.js    Uncaught exception: Expected SameValue(«"en-t-iw"», «"en-t-he"») to be true
intl402/Intl/getCanonicalLocales/unicode-ext-canonicalize-calendar.js    Uncaught exception: Expected SameValue(«"und-u-ca-ethiopic-amete-alem"», «"und-u
intl402/Intl/getCanonicalLocales/unicode-ext-canonicalize-col-strength.js    Uncaught exception: Expected SameValue(«"und-u-ks-primary"», «"und-u-ks-level1"»
intl402/Intl/getCanonicalLocales/unicode-ext-canonicalize-measurement-system.js    Uncaught exception: Expected SameValue(«"und-u-ms-imperial"», «"und-u-ms-uksyste
intl402/Intl/getCanonicalLocales/unicode-ext-canonicalize-region.js    Uncaught exception: Expected SameValue(«"und-u-rg-no23"», «"und-u-rg-no50"») to 
intl402/Intl/getCanonicalLocales/unicode-ext-canonicalize-subdivision.js    Uncaught exception: Expected SameValue(«"und-NO-u-sd-no23"», «"und-NO-u-sd-no50"
intl402/Intl/getCanonicalLocales/unicode-ext-canonicalize-timezone.js    Uncaught exception: Expected SameValue(«"und-u-tz-cnckg"», «"und-u-tz-cnsha"») t
intl402/ListFormat/constructor/constructor/subclassing.js    TypeError: Constructor Intl.ListFormat requires 'new'
intl402/ListFormat/constructor/supportedLocalesOf/options-toobject.js    Uncaught exception: Expected one call from true Expected SameValue(«0», «1») to 
intl402/ListFormat/prototype/format/es-es-long.js    Uncaught exception: Expected SameValue(«"foo, bar"», «"foo y bar"») to be true
intl402/ListFormat/prototype/format/es-es-short.js    Uncaught exception: Expected SameValue(«"foo, bar"», «"foo y bar"») to be true
intl402/ListFormat/prototype/format/iterable-invalid.js    Uncaught exception: Expected SameValue(«5», «3») to be true
intl402/ListFormat/prototype/format/iterable-iteratorclose.js    Uncaught exception: Expected SameValue(«5», «3») to be true
intl402/ListFormat/prototype/formatToParts/es-es-long.js    Uncaught exception: undefined: parts[1].value Expected SameValue(«", "», «" y "»
intl402/ListFormat/prototype/formatToParts/es-es-short.js    Uncaught exception: undefined: parts[1].value Expected SameValue(«", "», «" y "»
intl402/ListFormat/prototype/formatToParts/iterable-invalid.js    Uncaught exception: Expected SameValue(«5», «3») to be true
intl402/ListFormat/prototype/formatToParts/iterable-iteratorclose.js    Uncaught exception: Expected SameValue(«5», «3») to be true
intl402/Locale/canonicalize-locale-list-take-locale.js    TypeError: Constructor Intl.Locale requires 'new'
intl402/Locale/constructor-apply-options-canonicalizes-twice.js    Uncaught exception: Expected SameValue(«"ru-Armn-SU"», «"ru-Armn-AM"») to be tru
intl402/Locale/constructor-non-iana-canon.js    Uncaught exception: new Intl.Locale("aar-x-private").maximize().toString() retur
intl402/Locale/constructor-options-region-valid.js    Uncaught exception: new Intl.Locale('en', {region: "554"}).toString() returns "e
intl402/Locale/constructor-tag.js    Uncaught exception: new Intl.Locale("en-a-bar-u-baz-x-u-foo").toString() returns
intl402/Locale/extensions-grandfathered.js    Uncaught exception: Expected SameValue(«"fr-Cyrl-FR-gaulish-u-nu-latn"», «"fr-Cy
intl402/Locale/likely-subtags-grandfathered.js    Uncaught exception: Expected SameValue(«"art-lojban"», «"jbo"») to be true
intl402/Locale/likely-subtags.js    Uncaught exception: "en-Shaw".maximize() should be "en-Shaw-GB" Expected SameVal
intl402/Locale/prototype/minimize/removing-likely-subtags-first-adds-likely-subtags.js    Uncaught exception: "und-419".minimize() should be "es-419" Expected SameValue(«
intl402/Locale/reject-duplicate-variants-in-tlang.js    Uncaught exception: tag "de-t-en-emodeng-emodeng" must be considered structurall
intl402/Locale/subclassing.js    TypeError: Constructor Intl.Locale requires 'new'
intl402/PluralRules/can-be-subclassed.js    TypeError: Constructor Intl.PluralRules requires 'new'
intl402/PluralRules/constructor-option-read-order.js    (no output)
intl402/PluralRules/prototype/resolvedOptions/plural-categories-order.js    Uncaught exception: Actual [one, other] and expected [zero, one, two, few, many,
intl402/PluralRules/prototype/select/notation.js    Uncaught exception: standard notation: 1000000 Expected SameValue(«"other"», «"m
intl402/PluralRules/prototype/selectRange/invoked-as-func.js    Uncaught exception: Expected a TypeError to be thrown but no exception was throw
intl402/RelativeTimeFormat/constructor/constructor/options-toobject-prototype.js    Uncaught exception: options argument true should yield the correct value for "st
intl402/RelativeTimeFormat/constructor/constructor/subclassing.js    TypeError: Constructor Intl.RelativeTimeFormat requires 'new'
intl402/RelativeTimeFormat/constructor/supportedLocalesOf/options-toobject.js    Uncaught exception: Expected one call from true Expected SameValue(«0», «1») to 
intl402/RelativeTimeFormat/prototype/format/en-us-numbering-systems.js    Uncaught exception: locale: en-US-u-nu-arab Expected SameValue(«false», «true») 
intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js    Uncaught exception: Expected SameValue(«"in 0 seconds"», «"now"») to be true
intl402/RelativeTimeFormat/prototype/format/en-us-style-short.js    Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"in 1,000 sec."») 
intl402/RelativeTimeFormat/prototype/format/pl-pl-style-long.js    Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"za 1000 sekund"»)
intl402/RelativeTimeFormat/prototype/format/pl-pl-style-narrow.js    Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"za 1000 s"») to b
intl402/RelativeTimeFormat/prototype/format/pl-pl-style-short.js    Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"za 1000 sek."») t
intl402/RelativeTimeFormat/prototype/format/unit-invalid.js    Uncaught exception: symbol Expected a TypeError but got a RangeError
intl402/RelativeTimeFormat/prototype/formatToParts/en-us-numeric-auto.js    Uncaught exception: formatToParts(0, second): length Expected SameValue(«3», «1»
intl402/RelativeTimeFormat/prototype/formatToParts/en-us-style-short.js    Uncaught exception: formatToParts(1000, second): parts[4].value Expected SameVal
intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-long.js    Uncaught exception: formatToParts(1000, second): length Expected SameValue(«5», 
intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-narrow.js    Uncaught exception: formatToParts(1000, second): length Expected SameValue(«5», 
intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-short.js    Uncaught exception: formatToParts(1000, second): length Expected SameValue(«5», 
intl402/RelativeTimeFormat/prototype/formatToParts/unit-invalid.js    Uncaught exception: symbol Expected a TypeError but got a RangeError
intl402/RelativeTimeFormat/prototype/resolvedOptions/resolved-numbering-system-unicode-extensions-and-options.js    Uncaught exception: Resolved numberingSystem for locale=en-u-nu-arab with number
intl402/Segmenter/constructor/constructor/options-localeMatcher-valid.js    Uncaught exception: instanceof check - undefined
intl402/Segmenter/constructor/constructor/subclassing.js    TypeError: Constructor Intl.Segmenter requires 'new'
intl402/Segmenter/constructor/supportedLocalesOf/options-toobject.js    Uncaught exception: Expected one call from true Expected SameValue(«0», «1») to 
intl402/Segmenter/prototype/segment/containing/branding.js    Uncaught exception: Expected SameValue(«"undefined"», «"function"») to be true
intl402/Segmenter/prototype/segment/containing/breakable-input.js    Uncaught exception: granularity: undefined input: 123  containing(0) index Expec
intl402/Segmenter/prototype/segment/containing/index-throws.js    Uncaught exception: Expected a TypeError to be thrown but no exception was throw
intl402/Segmenter/prototype/segment/containing/iswordlike.js    Uncaught exception: granularity: undefined input: Hello world! containing(0) ind
intl402/Segmenter/prototype/segment/containing/length.js    TypeError: Cannot convert undefined or null to object
intl402/Segmenter/prototype/segment/containing/name.js    TypeError: Cannot convert undefined or null to object
intl402/Segmenter/prototype/segment/containing/one-index.js    Uncaught exception: granularity: undefined index: 1 index Expected SameValue(«1»
intl402/Segmenter/prototype/segment/containing/out-of-bound-index.js    Uncaught exception: Expected SameValue(«undefined», «[object Object]») to be tru
intl402/Segmenter/prototype/segment/containing/prop-desc.js    Uncaught exception: typeof %Segments.prototype%.containing  is function Expected
intl402/Segmenter/prototype/segment/containing/unbreakable-input.js    TypeError: containing is not a function
intl402/Segmenter/prototype/segment/containing/word-iswordlike.js    Uncaught exception: granularity: word input: Hello world! containing(0) index >=
intl402/Segmenter/prototype/segment/containing/zero-index.js    Uncaught exception: Expected SameValue(«0», «undefined») to be true
intl402/Segmenter/prototype/segment/name_of_symbol_iterator.js    Uncaught exception: Expected SameValue(«"[Symbol.iterator]"», «"values"») to be 
intl402/Segmenter/prototype/segment/next-mix-with-containing.js    Uncaught exception: containing(0) before the loop. segment Expected SameValue(«"
intl402/Segmenter/prototype/segment/segment-tostring.js    Uncaught exception: Expected a TypeError to be thrown but no exception was throw

Workflow

Pick a coherent single-root subcluster, localize (cargo run --release -- f.ts --trace hir --focus <fn> / --trace llvm), fix, verify listed cases pass AND re-run the slice for zero regressions. Code-only PR (no Cargo.toml/Cargo.lock version bump, no CLAUDE.md Current-Version, no CHANGELOG — maintainer folds metadata). cargo fmt --all -- --check + bash scripts/check_file_size.sh must pass (files < 2000 lines). Reference this issue. Never reference internal infrastructure hostnames.

[proggeramlug]

Closed by #8659, landed on main via #8723 (squash 8beca2f29).

That PR was landed through a batch wrapper PR rather than merged directly, so GitHub's close keyword never fired at merge time. Verified before closing: changelog.d/8659-intl402-worklist.md is present on main.

If any of the 101 cases are still failing, reopen — the close rests on the PR's completion claim plus the landed fragment, not on a re-run of the worklist.