test262 intl402 small constructors — 80 fails (RelativeTimeFormat/Segmenter/Collator/ListFormat/PluralRules/DisplayNames)

[proggeramlug]

Current state — 80 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.

Small Intl constructors — mostly arg-validation negatives (Expected a TypeError), supported-locales plumbing, and Collator canonical-equivalence collation. Grouped; see the per-constructor breakdown below.

Failure reasons

n	reason
6	Uncaught exception: Expected a TypeError to be thrown but no exception
5	Uncaught exception: instanceof check - undefined
4	TypeError: Cannot convert undefined or null to object
4	Uncaught exception: Expected SameValue(«5», «3») to be true
3	TypeError: value is not a function
3	Uncaught exception: Expected one call from true Expected SameValue(«0»
3	Uncaught exception: Expected SameValue(«"[object Object]"», «"[object
3	Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"za 1000
3	Uncaught exception: formatToParts(1000, second): length Expected SameV
2	Uncaught exception: Expected SameValue(«"undefined"», «"function"») to
2	Uncaught exception: Expected SameValue(«"foo, bar"», «"foo y bar"») to
2	Uncaught exception: undefined: parts[1].value Expected SameValue(«", "

By area

Segmenter 21 · RelativeTimeFormat 18 · Collator 15 · ListFormat 12 · DisplayNames 8 · PluralRules 6

All 80 failing tests (path — reason)

full list — click to expand

intl402/Collator/ignore-invalid-unicode-ext-values.js    Uncaught exception: Locale en-US-u-co-standard is affected by key co; value standard. Expe
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, y] and e
intl402/Collator/prototype/compare/non-normative-phonebook.js    Uncaught exception: Actual [A, Ab, Af, b, od, off, Ä, ö] and expected [A, Ab, Ä, Af, b, od
intl402/Collator/prototype/compare/non-normative-sensitivity.js    Uncaught exception: Actual [Aa] and expected [Aa, aA, áÁ, Aã] should have the same content
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(«false», «tr
intl402/Collator/prototype/resolvedOptions/resolved-case-first-unicode-extensions-and-options.js    Uncaught exception: Resolved locale for locale=en-u-kf-lower with caseFirst=upper Expected
intl402/Collator/prototype/resolvedOptions/resolved-collation-unicode-extensions-and-options.js    Uncaught exception: Resolved collation for locale=de-u-co-phonebk with collation=pinyin Ex
intl402/Collator/prototype/resolvedOptions/resolved-numeric-unicode-extensions-and-options.js    Uncaught exception: Resolved locale for locale=en-u-kn-false with numeric=true Expected Sa
intl402/Collator/unicode-ext-seq-with-attribute.js    Uncaught exception: Expected SameValue(«"de-u-co-phonebk"», «"de-u-attrval-co-phonebk"») t
intl402/Collator/unicode-ext-value-collation.js    Uncaught exception: Collation for "invalid" should be default, but is invalid. Expected Sa
intl402/Collator/usage-de.js    Uncaught exception: Actual [AE, Ä] and expected [Ä, AE] should have the same contents. sor
intl402/DisplayNames/ctor-custom-prototype.js    Uncaught exception: Expected SameValue(«[object Intl.DisplayNames]», «[object Object]») to
intl402/DisplayNames/locales-symbol-length.js    Uncaught exception: Actual [] and expected [length, 0] should have the same contents.
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/ListFormat/constructor/constructor/newtarget-undefined.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
intl402/ListFormat/constructor/constructor/subclassing.js    TypeError: value is not a function
intl402/ListFormat/constructor/supportedLocalesOf/options-toobject.js    Uncaught exception: Expected one call from true Expected SameValue(«0», «1») to be true
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 "») to be tr
intl402/ListFormat/prototype/formatToParts/es-es-short.js    Uncaught exception: undefined: parts[1].value Expected SameValue(«", "», «" y "») to be tr
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/ListFormat/prototype/toStringTag/toString.js    Uncaught exception: Expected SameValue(«"[object Object]"», «"[object Intl.ListFormat]"») 
intl402/PluralRules/can-be-subclassed.js    TypeError: Bind must be called on a function
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, other] sh
intl402/PluralRules/prototype/select/notation.js    Uncaught exception: standard notation: 1000000 Expected SameValue(«"other"», «"many"») to 
intl402/PluralRules/prototype/selectRange/invoked-as-func.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
intl402/PluralRules/undefined-newtarget-throws.js    Uncaught exception: Intl.PluralRules throws when called as a function Expected a TypeError
intl402/RelativeTimeFormat/constructor/constructor/newtarget-undefined.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
intl402/RelativeTimeFormat/constructor/constructor/options-toobject-prototype.js    Uncaught exception: options argument true should yield the correct value for "style" Expec
intl402/RelativeTimeFormat/constructor/constructor/subclassing.js    TypeError: value is not a function
intl402/RelativeTimeFormat/constructor/supportedLocalesOf/options-toobject.js    Uncaught exception: Expected one call from true Expected SameValue(«0», «1») to be 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."») to be true
intl402/RelativeTimeFormat/prototype/format/pl-pl-style-long.js    Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"za 1000 sekund"») to be tru
intl402/RelativeTimeFormat/prototype/format/pl-pl-style-narrow.js    Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"za 1000 s"») to be true
intl402/RelativeTimeFormat/prototype/format/pl-pl-style-short.js    Uncaught exception: Expected SameValue(«"in 1,000 seconds"», «"za 1000 sek."») to be true
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») to be tr
intl402/RelativeTimeFormat/prototype/formatToParts/en-us-style-short.js    Uncaught exception: formatToParts(1000, second): parts[4].value Expected SameValue(«" seco
intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-long.js    Uncaught exception: formatToParts(1000, second): length Expected SameValue(«5», «3») to be
intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-narrow.js    Uncaught exception: formatToParts(1000, second): length Expected SameValue(«5», «3») to be
intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-short.js    Uncaught exception: formatToParts(1000, second): length Expected SameValue(«5», «3») to be
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 numberingSystem=
intl402/RelativeTimeFormat/prototype/toStringTag/toString.js    Uncaught exception: Expected SameValue(«"[object Object]"», «"[object Intl.RelativeTimeFor
intl402/Segmenter/constructor/constructor/newtarget-undefined.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
intl402/Segmenter/constructor/constructor/options-localeMatcher-valid.js    Uncaught exception: instanceof check - undefined
intl402/Segmenter/constructor/constructor/subclassing.js    TypeError: value is not a function
intl402/Segmenter/constructor/supportedLocalesOf/options-toobject.js    Uncaught exception: Expected one call from true Expected SameValue(«0», «1») to be true
intl402/Segmenter/ctor-custom-prototype.js    Uncaught exception: Expected SameValue(«[object Intl.Segmenter]», «[object Object]») to be
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 Expected SameVa
intl402/Segmenter/prototype/segment/containing/index-throws.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
intl402/Segmenter/prototype/segment/containing/iswordlike.js    Uncaught exception: granularity: undefined input: Hello world! containing(0) index >= 0 Ex
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», «undefin
intl402/Segmenter/prototype/segment/containing/out-of-bound-index.js    Uncaught exception: Expected SameValue(«undefined», «[object Object]») to be true
intl402/Segmenter/prototype/segment/containing/prop-desc.js    Uncaught exception: typeof %Segments.prototype%.containing  is function Expected SameValue
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 >= 0 Expecte
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 true
intl402/Segmenter/prototype/segment/next-mix-with-containing.js    Uncaught exception: containing(0) before the loop. segment Expected SameValue(«"A"», «unde
intl402/Segmenter/prototype/segment/segment-tostring.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
intl402/Segmenter/prototype/toStringTag/toString.js    Uncaught exception: Expected SameValue(«"[object Object]"», «"[object Intl.Segmenter]"») t

Reproduce

scripts/test262_subset.py --root vendor/test262 --dir intl402/RelativeTimeFormat intl402/Segmenter intl402/Collator intl402/ListFormat intl402/PluralRules intl402/DisplayNames --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: small Intl constructors 146 → 80 (substantial — RelativeTimeFormat/Segmenter/Collator/ListFormat/PluralRules/DisplayNames arg-validation + plumbing fixes landed).