test262 built-ins/Promise — 42 fails (all/allSettled capability + then-iteration)

[proggeramlug]

Current state — 42 failing. Snapshot from the 2026-06-28 full sweep (perry 0.5.1207, node v26.3.0). Supersedes the original body; the complete current failing-test list is inline below — no re-run needed to start.

Promise.all/allSettled capability records with a custom/subclassed constructor + then-iteration ordering. (Real class X extends Promise subclass support is the largest remaining piece.)

Failure reasons

n	reason
5	TypeError: Bind must be called on a function
5	(no output)
5	Uncaught exception: Expected a Test262Error to be thrown but no except
3	TypeError: Promise resolve or reject function is not callable
3	Test262:AsyncTestFailure:Test262Error: Test262Error: Expected SameValu
3	Uncaught exception: Expected a TypeError to be thrown but no exception
2	Perry ran clean; Node rejected (missed negative)
2	TypeError: value is not a function
1	Test262:AsyncTestFailure:Test262Error: The promise should be rejected,
1	Uncaught exception: symbol Expected SameValue(«0», «1») to be true
1	Uncaught exception: null Expected a TypeError to be thrown but no exce
1	Uncaught exception: Invokes 'then' method exactly once Expected SameVa

All 42 failing tests (path — reason)

full list — click to expand

built-ins/Promise/all/ctx-ctor.js    TypeError: Promise resolve or reject function is not callable
built-ins/Promise/all/does-not-invoke-array-setters.js    Perry ran clean; Node rejected (missed negative)
built-ins/Promise/all/invoke-resolve-on-promises-every-iteration-of-custom.js    TypeError: Bind must be called on a function
built-ins/Promise/allSettled/ctx-ctor.js    TypeError: Promise resolve or reject function is not callable
built-ins/Promise/allSettled/does-not-invoke-array-setters.js    Perry ran clean; Node rejected (missed negative)
built-ins/Promise/allSettled/invoke-resolve-on-promises-every-iteration-of-custom.js    TypeError: Bind must be called on a function
built-ins/Promise/allSettled/iter-arg-is-poisoned.js    Test262:AsyncTestFailure:Test262Error: The promise should be rejected, but was resolved
built-ins/Promise/any/capability-resolve-throws-reject.js    (no output)
built-ins/Promise/any/invoke-resolve-on-promises-every-iteration-of-custom.js    TypeError: Bind must be called on a function
built-ins/Promise/any/invoke-resolve-on-values-every-iteration-of-custom.js    TypeError: Bind must be called on a function
built-ins/Promise/any/iter-arg-is-poisoned.js    Test262:AsyncTestFailure:Test262Error: Test262Error: Expected SameValue(«AggregateError», 
built-ins/Promise/prototype/catch/this-value-obj-coercible.js    Uncaught exception: symbol Expected SameValue(«0», «1») to be true
built-ins/Promise/prototype/catch/this-value-then-not-callable.js    Uncaught exception: null Expected a TypeError to be thrown but no exception was thrown at 
built-ins/Promise/prototype/finally/invokes-then-with-non-function.js    Uncaught exception: Invokes `then` method exactly once Expected SameValue(«0», «1») to be 
built-ins/Promise/prototype/finally/is-a-method.js    Uncaught exception: Expected the `finally` method on a Promise to be `Promise.prototype.fi
built-ins/Promise/prototype/finally/rejected-observable-then-calls-PromiseResolve.js    (no output)
built-ins/Promise/prototype/finally/rejected-observable-then-calls.js    Test262:AsyncTestFailure:Test262Error: Test262Error: Expected SameValue(«3», «5») to be tr
built-ins/Promise/prototype/finally/resolved-observable-then-calls-PromiseResolve.js    (no output)
built-ins/Promise/prototype/finally/resolved-observable-then-calls.js    Test262:AsyncTestFailure:Test262Error: Test262Error: Expected SameValue(«3», «5») to be tr
built-ins/Promise/prototype/finally/species-constructor.js    TypeError: value is not a function
built-ins/Promise/prototype/finally/subclass-reject-count.js    (no output)
built-ins/Promise/prototype/finally/subclass-resolve-count.js    (no output)
built-ins/Promise/prototype/finally/this-value-proxy.js    Uncaught exception: Expected SameValue(«false», «true») to be true
built-ins/Promise/prototype/finally/this-value-then-not-callable.js    Uncaught exception: undefined Expected a TypeError to be thrown but no exception was throw
built-ins/Promise/prototype/finally/this-value-then-poisoned.js    Uncaught exception: Expected a Test262Error to be thrown but no exception was thrown at al
built-ins/Promise/prototype/finally/this-value-then-throws.js    Uncaught exception: Expected a Test262Error to be thrown but no exception was thrown at al
built-ins/Promise/prototype/then/S25.4.5.3_A2.1_T1.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
built-ins/Promise/prototype/then/S25.4.5.3_A4.1_T1.js    Test262:AsyncTestFailure:TypeError: value is not a function
built-ins/Promise/prototype/then/S25.4.5.3_A4.1_T2.js    Test262:AsyncTestFailure:Test262Error: Test262Error: The value of result is expected to eq
built-ins/Promise/prototype/then/capability-executor-called-twice.js    TypeError: value is not a function
built-ins/Promise/prototype/then/capability-executor-not-callable.js    Uncaught exception: executor not called at all Expected SameValue(«""», «"a"») to be true
built-ins/Promise/prototype/then/ctor-access-count.js    Test262:AsyncTestFailure:Test262Error: Expected constructor access count: 1. Actual: 0
built-ins/Promise/prototype/then/ctor-null.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all
built-ins/Promise/prototype/then/ctor-poisoned.js    Uncaught exception: Expected a Test262Error to be thrown but no exception was thrown at al
built-ins/Promise/prototype/then/deferred-is-resolved-value.js    Uncaught exception: then() returns object Expected SameValue(«1», «[object Object]») to be
built-ins/Promise/race/ctx-ctor.js    TypeError: Promise resolve or reject function is not callable
built-ins/Promise/race/invoke-resolve-on-promises-every-iteration-of-custom.js    TypeError: Bind must be called on a function
built-ins/Promise/reject/capability-invocation-error.js    Uncaught exception: Expected a Test262Error to be thrown but no exception was thrown at al
built-ins/Promise/resolve/capability-invocation-error.js    Uncaught exception: Expected a Test262Error to be thrown but no exception was thrown at al
built-ins/Promise/resolve/ctx-ctor.js    TypeError: Promise.resolve called on non-object
built-ins/Promise/resolve/resolve-prms-cstm-then.js    Uncaught exception: Expected SameValue(«undefined», «[object Object]») to be true
built-ins/Promise/undefined-newtarget.js    Uncaught exception: Expected a TypeError to be thrown but no exception was thrown at all

Reproduce

scripts/test262_subset.py --root vendor/test262 --dir built-ins/Promise --jobs 6

Each path is under vendor/test262/test/; assemble harness + case per test-compat/test262/README.md to run one under perry compile.

[proggeramlug]

Cloud worker → PR #5748 (code-only, perry-runtime, +45/-3). Fixed the custom-then subcluster — a native Promise carrying a user-defined own then was ignored in (1) method-call dispatch (then/catch/finally were excluded from the own-expando override check, so combinators routed to the intrinsic js_promise_then) and (2) promise_resolve_assimilating (native fast-path bypassed the spec Get(resolution,"then")). built-ins/Promise 58 → 42 (+16), zero regressions. Remaining 42 are chiefly Promise-subclass support (class X extends Promise — super(executor) is a no-op today; drives ctx-ctor, subclass-*-count finally, and the Subclass.resolve.bind "Bind must be called on a function" cases) + prototype/finally/this-value-* and then/ctor-* validation.