Malte UblandClaude Opus 5.5 30e6ca9160 Convert promise and function values into a union's arm of their kind ...

A promise or function value flowing into a union whose only arm of that
kind has a wider payload or result (`Promise<T>` into `Promise<unknown> |
undefined`, `(s) => Promise<string | null>` into an optional
`(s) => Promise<string | null | undefined>` member) was refused with SC2003:
an arm value wrapped into a union only when the union held an identical
arm. It now takes the arm-level conversion (the checked payload widening,
the function adapter) and wraps the result.

`p === u` against such a union compares both sides as untyped values, so a
promise keeps its identity although converting it into the union's arm
builds a new promise.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-25 10:07:51 -07:00

..

corpus

Convert promise and function values into a union's arm of their kind

2026-10-25 10:07:51 -07:00

coverage-fixtures

Merge main and skip package.json files without a scriptc key

2026-10-25 03:58:49 -05:00

deadstrip

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diagnostics

Run lone array callbacks as loops with their bodies inlined (#1997)

2026-10-25 05:24:07 -05:00

ffi

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fixtures

Merge main

2026-10-25 02:06:50 -05:00

harness

Convert promise and function values into a union's arm of their kind

2026-10-25 10:07:51 -07:00

library-mode

Add object literal members through the store caches in untyped code

2026-10-25 08:24:12 -05:00

node-parallel

Compare termination signals and resolve the Node checkout path in the test/parallel runner

2026-10-24 16:00:06 -05:00

test262

Convert compareArray's message only when the arrays differ

2026-10-24 16:16:23 -05:00

wasm-spec

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