Malte UblandClaude Opus 5.5 0e9e908942 Short-circuit optional chain tails over unchecked reads ...

`a[0]?.b.c` read `.c` from undefined when the element was missing: the
tail only joined the guard when the checker typed the receiver nullable,
and an array or index-signature read is typed present while it lowers to
an undefined-armed value. The tail check now also accepts receivers that
can lower to a hidden undefined; present receivers re-dispatch the plain
lowering. A non-null assertion stays inside the chain (`a?.b!.c`), and
parentheses end it for checked-dynamic reads (`(a?.b).c` throws).

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

2026-10-18 15:13:17 -07:00

..

fixtures

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

ts7

Short-circuit optional chain tails over unchecked reads

2026-10-18 15:13:17 -07:00

array-batch-emission.test.ts

Improve array storage and bulk transformations

2026-10-06 01:05:40 -05:00

array-length-range-emission.test.ts

Load array lengths with the range of a JS array length

2026-10-16 07:33:26 -05:00

array-own-key-emission.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

array-pipeline-fusion.test.ts

Fuse array callback chains into single loops

2026-10-13 07:55:53 -05:00

await-call-emission.test.ts

Run never-suspending callees in place from stackless async bodies

2026-10-17 12:16:58 -07:00

bigint-literal-emission.test.ts

Speed up BigInt arithmetic, text conversion and small-value code

2026-10-13 10:26:49 -05:00

blob-boundaries.test.ts

Add Blob and File

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

buffer-from-dynamic.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

byte-loop-emission.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

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

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

bytes-element-emission.test.ts

Move owned bindings into their last read and hand stored arguments to constructors

2026-10-17 12:19:01 -07:00

call-lifetimes.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

cc-driver.test.ts

Accept typed-ref arguments in createCipheriv and the cipher methods

2026-10-15 18:47:02 -05:00

cjs-lexer-cases.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

cjs-lexer.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

class-field-updates.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

class-method-mutations.test.ts

Keep object-literal computed keys out of the method replacement census

2026-10-18 09:23:31 -05:00

class-narrowing-emission.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

class-protocol-boundaries.test.ts

Expect generic protocol dispatch to compile

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

collection-ingestion.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

collection-keys.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

compiler-weak-collections.test.ts

Keep the native compiler independent of weak keys

2026-10-09 20:26:57 -05:00

constant-table-emission.test.ts

Update constant-table emission test for exact index checks

2026-10-11 13:08:08 -07:00

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

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

create-require-native-addon.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

debug-variables.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

deep-equality.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

discriminated-json.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

emit-llvm.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

emitter-flex-events.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

ffi-lowering.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

forin-keys.test.ts

Build Object.entries natively and walk Object.values directly for unknown values

2026-10-14 08:34:53 -05:00

format-float-arguments.test.ts

Evaluate a %f boolean or unit argument without lowering it twice

2026-10-15 21:58:33 -05:00

fromcharcode-emission.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

fs-glob-boundaries.test.ts

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

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

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

Promote canary to main (#738)

2026-10-08 11:00:13 -05:00

generic-specialization-boundaries.test.ts

Strengthen generic type and class boundaries

2026-10-07 11:47:54 -05:00

in-runtime-key-emission.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

indexed-comparison.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

inline-record-assertion.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

input-lifetime-emission.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

int32-array-contracts.test.ts

Add Int32[] element contracts

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

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

integer-bitwise-arithmetic.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

integer-induction-conversion.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

integer-read-emission.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

integer-view-emission.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

internal-compiler-error.test.ts

Make LLVM the sole production backend

2026-09-29 20:54:09 -05:00

ir.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

js-class-layouts.test.ts

Compile JavaScript classes like TypeScript classes when their layout or JSDoc types allow it

2026-10-17 18:44:30 -05:00

js-override-returns.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

json-callbacks.test.ts

Use plain wording in docs, comments and test names

2026-10-14 11:43:44 -05:00

json-schema-parse-emission.test.ts

Parse JSON dictionaries on the direct schema parser

2026-10-17 11:10:43 -07:00

library-computed-methods.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

library-identity-emission.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

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

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

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

Pool small Buffers as Node does

2026-10-16 01:39:10 -05:00

math-receiver-borrow.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

mobile-runtime-pack.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

nan-coded-reads.test.ts

Keep typed-array reads unboxed in number compares and in-bounds bindings

2026-10-12 23:05:43 -05:00

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

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

native-callback-emission.test.ts

Promote canary to main (#738)

2026-10-08 11:00:13 -05:00

native-class-array-boundaries.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

native-class-descriptors.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

native-codegen-integration.test.ts

Skip WebAssembly irreducible control flow analysis on reducible functions

2026-10-18 01:30:29 -05:00

native-codegen-lowering.test.ts

Test that the zlib options forms lower

2026-10-16 10:10:02 -05:00

native-partitions.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

native-ts7-process.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

node-pin.test.ts

Add the zlib stream classes

2026-10-14 21:09:51 -05:00

numeric-array-reads.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

numeric-call-specialization.test.ts

Optimize scalar string access and numeric calls

2026-10-07 15:39:05 -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

process-builtin-values.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

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

Speed up regex replace, match and capture reads

2026-10-13 20:30:01 -05:00

runtime-optional-precision.test.ts

Treat type-asserted values as present in the optional-value analysis

2026-10-17 16:00:54 -05:00

scalar-record-emission.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

self-hosting-boundaries.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

set-iterator-seeds.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -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

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

source-output.test.ts

Free the address space after process.exit off the critical path (--detached-exit)

2026-10-11 07:05:29 -07:00

split-loop-emission.test.ts

Expect preserved lone surrogates in the native TypeScript client and the wider split cursor

2026-10-13 20:26:38 -05:00

startup.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

static-receiver-boundaries.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

string-accumulation-emission.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

string-and-array-lifetimes.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

string-scan-emission.test.ts

Let scan reads reload after string read fallbacks

2026-10-13 21:24:38 -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

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

symbol-fields.test.ts

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

trunc-emission.test.ts

Truncate inline on x86-64 and test typed-read presence without trunc

2026-10-10 14:03:20 -07:00

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

Make scriptc compilation native-only

2026-10-12 12:25:30 -05:00

typed-array-read-boxing.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

unassigned-field-reads.test.ts

Merge main and extract i32 entry bodies in emission tests

2026-10-13 12:36:06 -05:00

util-runtime-linking.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

var-hoisting.test.ts

Read undefined from vars and throw TDZ errors for classes used early

2026-10-13 18:51:09 -05:00

wasi-paths.test.ts

Enforce linting and consistent source formatting

2026-10-05 17:51:24 -05:00

worker-threads.test.ts

Add 8-byte allocator size classes below 128 bytes

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