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Malte UblandClaude Opus 5.5
f669c46f0d
- dns.lookup with options known only at run time (a checked-dynamic
value, or one cast to an overload's option type) may answer a string or,
with `all: true`, an address list, whatever the overload the checker
picked says: an inline callback now binds its parameters as
checked-dynamic values. Array.isArray tests a checker-narrowed dyn read's
dyn value instead of folding on the extracted type, so it never answers
false for an address list the declared type omits.
- net.connect({ lookup }) accepts a lookup of Node's own type
(net.LookupFunction: options plus a callback taking an address string
or list), called as Node's autoSelectFamily dial does ({ hints, all:
true }); the fallback declarations spell net.LookupFunction that way.
dns.lookup accepts Node's hints flags (ADDRCONFIG, V4MAPPED, ALL) and
passes them to getaddrinfo.
- A CommonJS export typed as the empty object literal (tsc's enum output
`exports.E || (exports.E = {})` after `exports.E = void 0`) rides
checked-dynamic storage, so the preamble's undefined no longer traps at
module load: @opentelemetry/api loads and its no-op metrics and trace
APIs run.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
node-types fixture
A project whose node_modules contains @types/node — the adoption path for real-world Node/TypeScript projects. The vendored node_modules are COMMITTED TEST DATA, pinned so the type surface (and therefore the pinned diagnostics) never drifts with the registry:
@types/node24.13.3undici-types7.18.2 (its dependency — declares the web-platform globals: fetch/Response/AbortSignal/ReadableStream/...)
What the fixture pins (see tests/harness/project-config.test.ts):
argv-env.ts— the SUPPORTED process surface (argv, env) typed by @types/node lowers statically and the binary runs: with @types/node present, the shipped fallback declarations forprocess/node:fs/consolestand down (their types come from @types/node), but the same members lower to the same libCalls, recognized by name + @types/node provenance.fenced.ts— surface @types/node DECLARES but scriptc does not lower (process.uptime, Buffer.from, setInterval) reports the SC2020-family fence naming @types/node, instead of typechecking its way into a broken binary — and never a raw "Cannot find name" error.source-import/— an imported TypeScript source may use theRequestInfoglobal supplied by TypeScript's default DOM lib while scriptc adopts the project's @types/node declarations.
Projects WITHOUT @types/node (every other fixture and the whole corpus) keep the shipped fallback declarations and behave exactly as before.