Malte UblandClaude Opus 5.5 541b05ddea Map generic alias casts inside generic bodies with the instance's arguments ...

A cast to a generic type alias spelled over the enclosing function's own
type parameters (`return x as Catalog<G, P>`) stays symbolic in the
checker inside the body, so a mapped type with key remapping, a template
key filter or a conditional member refused with SC2001 in every instance.

The checker interns alias instantiations, so the body's `Catalog<G, P>` is
the same type the signature declares. Binding unification now records, per
call-keyed instance, each declared generic alias reference together with
the alias the call's resolved signature instantiates. When the symbolic
form does not map, mapType maps that concrete instantiation instead. A body
forwarding its own alias to another generic resolves through the enclosing
instance. Types that already mapped are unaffected.

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

2026-10-25 09:22:06 -07:00

..

fixtures

Compute with NaN-boxed jsval values in the dynamic tier

2026-10-18 15:11:32 -07:00

ts7

Map generic alias casts inside generic bodies with the instance's arguments

2026-10-25 09:22:06 -07:00

array-batch-emission.test.ts

…

array-index-product-emission.test.ts

Index arrays with exact i64 products of int32 values

2026-10-22 13:11:34 -05:00

array-induction-read-emission.test.ts

Shrink the array header to 48 bytes

2026-10-20 00:21:45 -05:00

array-length-range-emission.test.ts

Shrink the array header to 48 bytes

2026-10-20 00:21:45 -05:00

array-own-key-emission.test.ts

…

array-pipeline-fusion.test.ts

Keep the helper for callbacks that read a local class's captures

2026-10-25 04:54:28 -05:00

await-call-emission.test.ts

Match Node's AsyncLocalStorage context in async prefixes and generator steps

2026-10-22 03:00:21 -05:00

bigint-literal-emission.test.ts

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blob-boundaries.test.ts

Add Blob and File

2026-10-14 21:17:46 -05:00

buffer-from-dynamic.test.ts

…

byte-loop-emission.test.ts

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byte-number-emission.test.ts

Pin the localized checksum in module byte-loop emission

2026-10-15 06:12:23 -07:00

byte-window-emission.test.ts

…

bytes-callback-helpers.test.ts

Call typed-array callbacks directly and visit on an integer counter

2026-10-22 04:44:34 -05:00

bytes-element-emission.test.ts

Convert clamped stores inline and test thread-owned views once in typed-array loops

2026-10-22 02:09:43 -05:00

bytes-field-borrow-emission.test.ts

Merge main

2026-10-20 17:56:44 -05:00

bytes-header-load-emission.test.ts

Read a typed array's length without an invariant header load

2026-10-25 09:59:43 -05:00

call-lifetimes.test.ts

…

callback-loop-versions.test.ts

Keep callback loop versions from nesting

2026-10-22 09:55:01 -05:00

callback-pending-emission.test.ts

Pass callbacks through bindings in tests of the array-helper and closure paths

2026-10-23 10:28:44 -05:00

cc-driver.test.ts

Support crypto.createDiffieHellman and getDiffieHellman

2026-10-21 21:55:47 -05:00

chunked-emission.test.ts

Skip comments when renaming a range's debug ids

2026-10-25 06:31:51 -05:00

cjs-lexer-cases.ts

…

cjs-lexer.test.ts

…

class-attributes.test.ts

Freeze class instances held in untyped values

2026-10-23 20:13:09 -05:00

class-field-updates.test.ts

…

class-method-mutations.test.ts

Guard direct calls after dot-property method writes through dictionary views

2026-10-23 21:34:14 -05:00

class-narrowing-emission.test.ts

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class-protocol-boundaries.test.ts

Expect generic protocol dispatch to compile

2026-10-17 19:11:33 -05:00

collection-ingestion.test.ts

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collection-keys.test.ts

Represent Dates as objects with identity

2026-10-22 20:33:09 -05:00

compat-exports.test.ts

Build the large compiler tables on first use

2026-10-25 05:23:35 -05:00

compiler-weak-collections.test.ts

…

completion-callbacks.test.ts

Run completion callbacks in their call's AsyncLocalStorage context, and add bind, snapshot and store options

2026-10-22 06:11:52 -05:00

constant-graphs.test.ts

Read prototype methods stored under computed keys on ES5 instances

2026-10-24 16:26:38 -05:00

constant-table-emission.test.ts

…

constructed-class-dispatch.test.ts

Dispatch closed virtual calls to their implementations directly

2026-10-16 06:54:44 -07:00

counted-loop-emission.test.ts

Keep the budget in typed-array length loops that assign their array

2026-10-25 09:13:52 -05:00

create-require-native-addon.test.ts

…

date-time-values.test.ts

Keep Dates as time values where no use observes their identity

2026-10-22 20:36:52 -05:00

debug-variables.test.ts

Keep a union loop binding in the debug-variables fixture

2026-10-25 07:46:24 -05:00

deep-equality.test.ts

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dictionary-views.test.ts

Keep checked dictionary protocols and invalidate direct calls after method writes

2026-10-23 20:45:37 -05:00

discriminated-json.test.ts

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emit-llvm.test.ts

Compute with NaN-boxed jsval values in the dynamic tier

2026-10-18 15:11:32 -07:00

emitter-flex-events.test.ts

…

ffi-lowering.test.ts

…

forin-keys.test.ts

Enumerate each record in the key order its object literal wrote

2026-10-22 22:56:12 -05:00

format-float-arguments.test.ts

Run lone array callbacks as loops with their bodies inlined

2026-10-23 09:25:07 -05:00

fromcharcode-emission.test.ts

Compute with NaN-boxed jsval values in the dynamic tier

2026-10-18 15:11:32 -07:00

fs-glob-boundaries.test.ts

Add fs.globSync, fs.glob and fs/promises glob

2026-10-15 07:59:19 -05:00

gen-wasm-spec-cases.mjs

Decode and validate the WebAssembly modules a program can load, and report them in coverage

2026-10-18 15:19:39 -07:00

generator-emission.test.ts

Store and take number and boolean generator values inline

2026-10-16 06:59:43 -07:00

generic-class-recovery.test.ts

…

generic-specialization-boundaries.test.ts

…

in-runtime-key-emission.test.ts

Name lowered helpers and closures independently of lowering order

2026-10-22 03:44:38 -05:00

indexed-comparison.test.ts

…

inline-record-assertion.test.ts

…

input-lifetime-emission.test.ts

…

int32-array-contracts.test.ts

Add Int32[] element contracts

2026-10-17 12:08:06 -07:00

int32-dynamic-exposure.test.ts

Keep int32 fields of classes whose prototypes are named for inspection

2026-10-21 21:28:46 -05:00

int32-element-array-emission.test.ts

Prove int32 array candidates in one analysis that revises dropped ones

2026-10-25 02:32:44 -05:00

int32-local-emission.test.ts

Keep proven module numbers in an i32 local of their initializer

2026-10-15 05:07:10 -07:00

int32-reflection-emission.test.ts

Keep int32 field storage when reflection reads values through unknown

2026-10-16 01:10:45 -05:00

int32-slots-transfer.test.ts

Compute dev builds' int32 slot analysis on a forked process

2026-10-25 02:15:04 -05:00

integer-bitwise-arithmetic.test.ts

…

integer-induction-conversion.test.ts

…

integer-read-emission.test.ts

…

integer-view-compares.test.ts

Compare integer values without converting them to doubles

2026-10-23 20:02:25 -05:00

integer-view-emission.test.ts

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internal-compiler-error.test.ts

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ir.test.ts

Make Dates mutable objects with Node's setters and conversions

2026-10-23 22:08:02 -05:00

js-class-layouts.test.ts

Box JavaScript class instances at their exact class

2026-10-23 17:41:28 -07:00

js-collection-types.test.ts

Infer untyped JavaScript collection types once, without re-entering

2026-10-24 22:34:45 -05:00

js-ic-emission.test.ts

Add object literal members through the store caches in untyped code

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

js-override-returns.test.ts

…

json-callbacks.test.ts

Revert "Continue a failed checked cast with its value in a dynamic tail (#1561)"

2026-10-20 16:42:01 -07:00

json-schema-parse-emission.test.ts

Parse JSON into discriminated unions in one pass

2026-10-25 00:44:25 -05:00

keyed-method-writes.test.ts

Keep class methods native when element writes store data under their names

2026-10-23 13:20:59 -05:00

library-computed-methods.test.ts

…

library-identity-emission.test.ts

…

live-view-commit-emission.test.ts

Emit no commit adapters for class and record views without dynamic stores

2026-10-16 04:45:45 -05:00

llvm-lib-dispatch.test.ts

Compute with NaN-boxed jsval values in the dynamic tier

2026-10-18 15:11:32 -07:00

llvm-remainder.test.ts

Keep power-of-two remainders on integer paths where truncation is a round trip

2026-10-17 12:28:03 -07:00

llvm-runtime-abi.test.ts

Support named properties and Symbol.species on typed arrays held as untyped values

2026-10-23 21:30:21 -05:00

local-class-private-boundaries.test.ts

Merge main

2026-10-20 17:56:44 -05:00

map-get-borrow-emission.test.ts

Keep a Map.get result owned when its key can replace the map's holder

2026-10-25 03:25:37 -05:00

match-row-emission.test.ts

Merge main

2026-10-19 07:55:06 -05:00

math-receiver-borrow.test.ts

…

mobile-runtime-pack.test.ts

…

namespace-member-fences.test.ts

Read Math, JSON and Reflect as real objects in JavaScript

2026-10-23 10:16:30 -05:00

nan-coded-reads.test.ts

…

narrow-guard-emission.test.ts

Say that a lying type predicate can fail a narrowing guard

2026-10-18 07:31:43 -07:00

narrow-guard-traps.test.ts

Say that a lying type predicate can fail a narrowing guard

2026-10-18 07:31:43 -07:00

native-callable-values.test.ts

Merge main

2026-10-20 17:56:44 -05:00

native-callback-emission.test.ts

…

native-class-array-boundaries.test.ts

…

native-class-descriptors.test.ts

Merge main

2026-10-20 17:56:44 -05:00

native-codegen-integration.test.ts

Merge main and move to ABI 45

2026-10-25 06:31:07 -05:00

native-codegen-lowering.test.ts

zlib: Brotli compression and decompression over the vendored brotli 1.2.0

2026-10-23 18:11:49 -05:00

native-json-value-end.test.ts

Scan checker reply strings with many escapes in one pass

2026-10-24 15:56:52 -05:00

native-partitions.test.ts

Place each source file's functions in the same partitions

2026-10-24 00:34:25 -05:00

native-profile.test.ts

Count profile-annotated functions when the annotation runs

2026-10-24 16:05:36 -05:00

native-ts7-process.test.ts

…

node-index.test.ts

Read emitter analyses from one recorded walk of the module

2026-10-23 06:22:00 -05:00

node-pin.test.ts

Build the large compiler tables on first use

2026-10-25 05:23:35 -05:00

numeric-array-reads.test.ts

…

numeric-call-specialization.test.ts

…

observed-method-guard.test.ts

Keep the dynamic call for observed methods called with a spread argument

2026-10-23 00:05:57 -05:00

package-shim-guard.test.ts

Build @hono/node-server 2.x into scriptc

2026-10-22 19:32:49 -07:00

parameter-version-emission.test.ts

Version functions on number parameters that bound their loops

2026-10-22 11:46:21 -05:00

performance-entry-boundaries.test.ts

Add process.memoryUsage, process identity members, and performance marks and measures

2026-10-14 09:58:18 -05:00

power-of-two-quotient-emission.test.ts

Divide by Math.pow(2, n) as a multiply by its reciprocal

2026-10-23 22:59:39 -05:00

process-builtin-values.test.ts

…

process-listener-int32-emission.test.ts

Keep int32 class fields when a program registers process event listeners

2026-10-16 20:13:00 -05:00

property-bag-emission.test.ts

Keep a property bag only for classes whose bag something stores

2026-10-16 05:12:23 -05:00

regex-capture-emission.test.ts

…

regex-matcher-bounds.test.ts

Bound compiled regex reads by the characters left in the subject

2026-10-22 08:03:32 -05:00

replacer-params.test.ts

Keep replace callback parameters checked-dynamic where parseInt or parseFloat expects another type

2026-10-25 06:42:25 -05:00

running-extrema-branches.test.ts

Keep running maximum and minimum updates as branches

2026-10-22 08:16:36 -05:00

runtime-optional-precision.test.ts

Pass callbacks through bindings in tests of the array-helper and closure paths

2026-10-23 10:28:44 -05:00

scalar-record-emission.test.ts

…

self-hosting-boundaries.test.ts

…

set-iterator-seeds.test.ts

…

shape-inference.test.ts

Follow values through shadowed members, unknown keys on arrays, JSON callbacks and proxies

2026-10-24 13:20:02 -05:00

size-conversions.test.ts

Fix wasm32 array lengths past 2^31 and pending top-level await exit codes

2026-10-15 13:39:03 -05:00

source-debugging.test.ts

…

source-output.test.ts

Reuse the bundled declaration files' diagnostics across builds

2026-10-23 10:32:15 -05:00

speculative-hoisted-functions.test.ts

Merge main

2026-10-20 17:56:44 -05:00

speculative-loop-emission.test.ts

Speculate floor-mods and products by powers of two as masks and shifts

2026-10-25 03:56:48 -05:00

split-loop-emission.test.ts

…

stable-names.test.ts

Name source files relative to the entry's directory in structural positions

2026-10-22 09:39:07 -05:00

startup.test.ts

…

static-receiver-boundaries.test.ts

…

string-accumulation-emission.test.ts

Compute with NaN-boxed jsval values in the dynamic tier

2026-10-18 15:11:32 -07:00

string-and-array-lifetimes.test.ts

…

string-char-at-emission.test.ts

Read ASCII characters of strings inline in charAt and indexing

2026-10-21 13:12:24 -05:00

string-char-loop-emission.test.ts

Version string scans over the UTF-16 units of strings that are not ASCII

2026-10-23 22:40:04 -05:00

string-scan-emission.test.ts

Convert a loop's string receiver to UTF-16 at once, and publish it only when the scan holds another string

2026-10-24 22:53:15 -05:00

string-unit-loop-emission.test.ts

Convert a loop's string receiver to UTF-16 at once only when the loop can read enough of it

2026-10-25 07:37:50 -05:00

structural-value-boundaries.test.ts

Keep class instance identity through structural record views

2026-10-16 14:02:02 -07:00

style-text.test.ts

…

symbol-fields.test.ts

…

target-cpu-emit.test.ts

Check target CPU levels in the native CLI and honor them for assembly and object builds

2026-10-23 18:26:12 -05:00

trunc-emission.test.ts

…

tuple-forof.test.ts

Accept a frame-stored tuple receiver in the tuple for-of test

2026-10-17 13:32:48 -07:00

type-mapper-unions.test.ts

Name lowered helpers and closures independently of lowering order

2026-10-22 03:44:38 -05:00

typed-array-alias-scope-emission.test.ts

Declare a typed-array loop version's alias scopes where its fast copy starts

2026-10-24 21:50:36 -05:00

typed-array-read-boxing.test.ts

…

typed-array-union-emission.test.ts

Merge main

2026-10-23 19:28:30 -05:00

unassigned-field-reads.test.ts

…

undici-shim-framing.test.ts

Merge main

2026-10-20 11:00:03 -05:00

undici-shim-types.test.ts

Give the undici npm cases a 600 s timeout

2026-10-19 23:38:15 -05:00

union-scalar-equality-emission.test.ts

Read the union payload inline when comparing it with a number or boolean

2026-10-22 09:32:19 -05:00

untyped-push-emission.test.ts

Dispatch untyped calls on plain arrays without the method ladder

2026-10-24 00:43:56 -05:00

util-runtime-linking.test.ts

…

var-hoisting.test.ts

…

wasi-paths.test.ts

…

wasm-spec-cases.txt

Decode and validate the WebAssembly modules a program can load, and report them in coverage

2026-10-18 15:19:39 -07:00

wasm-spec.test.ts

Decode and validate the WebAssembly modules a program can load, and report them in coverage

2026-10-18 15:19:39 -07:00

while-bytes-bounds-emission.test.ts

Keep the while-loop bound off counters written inside expressions

2026-10-24 18:32:42 -05:00

while-induction-emission.test.ts

Keep while-loop counters bounded by a typed array length in integers

2026-10-24 12:37:29 -05:00

worker-shared-loop-version-emission.test.ts

Prove typed-array loop bounds in worker programs when a view has shared storage

2026-10-25 08:06:24 -05:00

worker-threads.test.ts

Add 8-byte allocator size classes below 128 bytes

2026-10-14 21:28:04 -05:00