- Merge origin/main (e9fb01603); the import lines at the top of
lowerer.ts conflicted and both are kept.
- Corpus 6385 gains a wrapper whose block-local `args` alias shadows an
outer one in the same function; each call forwards its own arguments.
Externrefs a guest holds are borrowed pointers. An import's result was
kept only until the outermost call returned, which was before the export
call converted its results to JavaScript, so a result created by an
import was freed before conversion. A table or global slot released the
reference it replaced at once, although the guest may still hold it in a
local after reading the slot. The kept references are now released after
the outermost caller has converted its results (scr_wasm_leave), and a
table or global store during a call keeps the reference it replaces until
then.
Checked memories (explicit bounds checks: sanitized builds, Windows)
grew with realloc, which can move the storage that memory.buffer and its
views alias. They now reserve the address space for their largest size
(mmap on POSIX hosts, VirtualAlloc on Windows) and commit pages as they
grow, so the base never moves. Hosts without address-space reservation
grow in place only until a buffer has been handed out; after that,
growth that would move the storage fails.
Tests: webassembly-externref-lifetimes.mjs (import results through an
export, table and global references replaced by the guest and by
JavaScript), webassembly-memory-growth.test.ts (views written after
growth from JavaScript and from the guest), and translate.test.ts cases
for memargs naming memory 0 explicitly and for local.tee operand types,
which b3bcbaaf7 made consistent with validation. Under SCRIPTC_SAN=1 the
two runtime tests report heap-use-after-free without these changes.
Merges main; internal/compatibility/generated/node-v24-backlog.json is
regenerated with pnpm node-compat.
- matchInferSignature reads a fixed-tuple rest as its positions, so
(...args: [string, number]) needs two arguments, and a positional
any[] pattern parameter matches only when the function's parameter
there accepts an array, as TypeScript's assignability does
(corpus 6398).
- Merge origin/main (200fe8d22); node-v24-backlog.json regenerated.
- Merge origin/main (e1c27176a).
- matchInferSignature answers false when a function needs more arguments
than a fixed-parameter pattern passes, as TypeScript's assignability
does (corpus 6398).
- Record corpus costs for the programs this change adds.
Node answers a Unix-socket server's address() with its path. Programs
that call listen() with a string argument now get a Unix-aware
address(): typed `string | AddressInfo | null` (the @types/node
declaration), it answers the path; typed as the AddressInfo record alone,
which cannot hold the path, it throws for such a server, as does the
composed address().port read. Every other program keeps the record-only
lowering, so their output is unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
@types/node types the transform/flush completion callback's data as any
and a child stream 'data' chunk as any, and ChildProcess accepts
(code: number, signal: string) exit and close listeners through its
catch-all overload. None of these compiled: the any-typed completion
callback crashed the LLVM emitter, and the child listeners were refused.
The completion callback's data parameter is typed Buffer | string |
undefined while the option callback lowers. Child stream 'data' listeners
with an unknown or any chunk box it as a checked-dynamic value, taking
strings when a setEncoding statement on the same stream precedes the
listener and Buffers when the function never calls setEncoding on it;
other placements are refused. Exit and close listener parameters declared
number or string bind as checked-dynamic values, so the body sees the
null Node passes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
http.request, https.request and get now accept options the compiler
cannot see as an object literal: a RequestOptions variable, a literal
that spreads one, or a literal that sets socketPath. The runtime reads
the record in the ClientRequest constructor's order with Node's errors;
documented options it does not implement throw the runtime fence when
they carry a value. https adds rejectUnauthorized, ca and servername.
socketPath dials a Unix domain socket in the net unit; the agent keys
its sockets by the path as Node's getName does, and the Host header
defaults to localhost. server.listen(path[, cb]) binds a Unix socket and
removes the socket file when the server closes; a numeric string is
still a port. Errors name the path ("connect ENOENT /path", "listen
EADDRINUSE: address already in use /path"). Windows reports ENOTSUP.
A TypeScript object literal with no contextual type that spreads a
checked-dynamic value maps to the checked dynamic, so
`const options = { ...location, path, timeout }` compiles.
A socket's 'lookup' event reaches its listeners with (err, address,
family, host) for each address a host name resolves to, or once with
the lookup error, before 'connect'. Only programs that listen for
'lookup' install the lookup records; elsewhere the hook sites are a NULL
check.
server.close((err) => ...) runs the callback with undefined at 'close',
or with ERR_SERVER_NOT_RUNNING when the server was not listening; a
server that never listened now emits 'close'. IncomingMessage 'data'
listeners may take string chunks after setEncoding, and res.end()
accepts a string-or-undefined chunk.
fetch's BodyInit and HeadersInit unions, as RequestInit-derived option
types spell them under @types/node, map to the checked dynamic, and a
URLSearchParams body is sent form-encoded, as by Node.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
child.stdout.pipe(), stream events and writes beyond write(string) on a
NodeJS stream interface slot, and pipes into a child's stdin now lower
the program with the general representation instead of fencing. The
fallback ChildStdin is a NodeJS.WritableStream, and the coverage
remainder relowers its unreached code the same way.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Bundled npm code (glob, yazl, from2, multistream) subclasses Node's
classes with constructor functions: util.inherits(Ctor, EventEmitter) and
EventEmitter.call(this). util.inherits received an identity token and
threw ERR_INVALID_ARG_TYPE, EventEmitter.call(this) and
EventEmitter.prototype were refused, and `this instanceof Ctor` against
a function was refused.
A new runtime unit (scr_dyn_builtin_class.c, linked by the new
dynBuiltinClass feature) provides EventEmitter, the legacy Stream and
the stream classes as untyped constructor functions with Node's
prototype chain. EventEmitter's prototype ports lib/events.js over the
object's own _events, _eventsCount and _maxListeners properties; Stream
adds the legacy pipe. util.inherits, Base.call/apply(this, ...),
Base.prototype, instanceof on untyped values and JavaScript value reads
of these classes use them. Constructing over a stream class throws
SC2020 where it runs. instanceof against a compiled constructor function
compares its prototype with the value's prototype chain.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Main replaced the runtime-feature scan with a rule table, the executable
unit list with a unit table and the module emission with emit-module.ts:
perfLoop becomes a rule (perf.idleTime, perf.loop*, perf.eld*), a unit
(scr_perf_loop.c) and emit-module's loop-start mark (readsLoopMetrics is
now public). The feature lists take both perfLoop and main's webcrypto.
This branch's lower-exprs.ts hunks move to expressions/property-access.ts
(histogram readings), expressions/binary.ts (`??` with a function
default) and expressions/relational.ts (`in` over class members); the
caughtRead fallback stays in lower-exprs.ts.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Main split lower-exprs.ts into expressions/*; this branch's hunks move to
expressions/identifiers.ts (typed 'arguments') and
expressions/property-access.ts (static fn.name, forwarded tuple length,
'this'-parameter arity). Main removed the checker's declarationsOf,
valueDeclarationOf and signatureDeclaration helpers; the branch's uses
read symbol.declarations, symbol.valueDeclaration and
signature.declaration.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A typed rest-parameter function passed where a function with fixed parameters is expected (`log(...m: string[])` into `(m: string) => void`) was refused. The function adapter now packs the slot's remaining arguments into the rest array, and the value check admits the function wherever that adapter fits. A nested function declaration with a typed rest parameter becomes a value with its own typed-rest signature, converted at each use.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Main split lower-exprs.ts into expression families; the typeof and __dirname changes move to expressions/typeof.ts and expressions/identifiers.ts.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A thrown array reached its catch binding as a type-erased native array:
`console.log(e)` printed `{}` where Node prints the array, `String(e)`
gave "[object Object]", `Array.isArray(e)` was false and a typed view
such as `(e as number[]).length` threw a TypeError. Thrown records
already crossed the catch boundary as checked-dynamic values that keep
their identity; arrays, and unions over records and arrays, now take the
same conversion, so the catch binding is the thrown object.
node:test printed a failing test's thrown non-Error value with String():
`throw { code: 42 }` reported `[object Object]` where Node prints the
value as util.inspect renders it. The failing-tests section now inspects
thrown numbers, booleans and checked-dynamic values (records, arrays,
null and undefined); a thrown string is quoted as before. A thrown class
instance that is not an Error still prints `[object Object]` (the
limitations page says so).
Adds corpus 6341, extends the thrown-values node:test fixture, and
records 6341's cost.
Once generic wrappers compile (#1413), the code behind them is reachable.
This closes the general gaps found there:
- performance.eventLoopUtilization() and monitorEventLoopDelay()'s
IntervalHistogram (enable, disable, reset, percentile and the min, max,
mean, stddev, count and exceeds readings), under the fallback
declarations and @types/node. A new runtime unit, scr_perf_loop.c, links
only for programs that read them (the perfLoop feature): an unref'd
sampling interval records into HdrHistogram-shaped buckets, and
utilization measures active time as the main thread's CPU time since
the loop started.
- Catch bindings narrowed by a user type predicate or an assertion read
their members through the checked-dynamic value.
- `??` with a function default of a different signature takes the
optional callback's own function type and adapts the default.
- Optional calls on interface-typed receivers dispatch like the plain
protocol call.
- `any` parameters of function declarations and spelled function types
are checked-dynamic slots, and a generic instantiated at `any` takes
`unknown` there.
- `'key' in err` on Error receivers answers from the declaring subclasses.
- Object.entries over a generic record resolves
`keyof T extends never ? unknown : T[keyof T]` through the binding.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Resolve the conflicts with main's process.features value, the WebCrypto dynamic types, the NODE_COMPAT_VERSION import and the symbol.declarations API. Renumber this branch's corpus programs to 6420-6429, write the new limitations partial one sentence per line, and regenerate the compatibility outputs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A .ts or .tsx file with import syntax is an ES module under Node's strip-types rule, which has no __dirname or __filename. TypeScript projects are commonly shipped as CommonJS bundles where both exist, and @types/node declares them for every file. scriptc now compiles them in such files to the module's source path, the same compile-time constants as in CommonJS and the same strings as import.meta.dirname and import.meta.filename. JavaScript ES modules keep the fence. The limitations page documents the difference.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Chris Tate