Jarred Sumner 77ca318336 Reduce the number of closures in generated bundler code (#27022) ...

### Problem

The bundler's `__toESM` helper creates a new getter-wrapped proxy object
every time a CJS
module is imported. In a large app, a popular dependency like React can
be imported 600+
times — each creating a fresh object with ~44 getter properties. This
produces ~27K
unnecessary `GetterSetter` objects, ~25K closures, and ~25K
`JSLexicalEnvironment` scope
objects at startup.

Additionally, `__export` and `__exportValue` use `var`-scoped loop
variables captured by
setter closures, meaning all setters incorrectly reference the last
iterated key (a latent
  bug).

### Changes

1. **`__toESM`: add WeakMap cache** — deduplicate repeated wrappings of
the same CJS
module. Two caches (one per `isNodeMode` value) to handle both import
modes correctly.
2. **Replace closures with `.bind()`** — `() => obj[key]` becomes
`__accessProp.bind(obj,
key)`. BoundFunction is cheaper than Function + JSLexicalEnvironment,
and frees the for-in
  `JSPropertyNameEnumerator` from the closure scope.
3. **Fix var-scoping bug in `__export`/`__exportValue`** — setter
closures captured a
shared `var name` and would all modify the last iterated key. `.bind()`
eagerly captures
the correct key per iteration.
4. **`__toCommonJS`: `.map()` → `for..of`** — eliminates throwaway array
allocation.
5. **`__reExport`: single `getOwnPropertyNames` call** — was calling it
twice when
`secondTarget` was provided.

### Impact (measured on a ~23MB single-bundle app with 600+ React
imports)

| Metric | Before | After | Delta |
|--------|--------|-------|-------|
| **Total objects** | 745,985 | 664,001 | **-81,984 (-11%)** |
| **Heap size** | 115 MB | 111 MB | **-4 MB** |
| GetterSetter | 34,625 | 13,428 | -21,197 (-61%) |
| Function | 221,302 | 197,024 | -24,278 (-11%) |
| JSLexicalEnvironment | 70,101 | 44,633 | -25,468 (-36%) |
| Structure | 40,254 | 39,762 | -492 |

2026-02-15 00:36:57 -08:00

..

__snapshots__

test: refactor spawnSync to spawn with describe.concurrent (#25849)

2026-01-06 15:37:56 +00:00

02499

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

03844

framework api: init / work in progress (#13215)

2024-09-12 16:44:03 -07:00

04298

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

06946

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07500

Fix ReadFileUV not reading to the end of a non-regular file on Windows (#13900)

2024-09-11 17:33:01 -07:00

07917

Fix fetch with formdata on some servers (#16947)

2025-01-31 22:39:43 -08:00

08964

Prevent test.only and snapshot updates in CI (#21811)

2025-09-24 15:19:16 -07:00

08965

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

09041

Fix: after pausing stdin, a subprocess should be able to read from stdin (#23341)

2025-10-09 19:04:41 -07:00

09563

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

10380

Update bun:test diff (#21158)

2025-08-06 06:44:46 -07:00

11297

fix(windows): prevent data loss in pipe reads after libuv 1.51.0 upgrade (#23340)

2025-10-07 18:33:34 -07:00

12034

Fix Jest globals not being available in non-entrypoint files (#17734)

2025-02-26 16:02:15 -08:00

12910

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

14477

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

14976

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

14982

Use ReadableStream.prototype.* in tests instead of new Response(...).* (#20937)

2025-07-14 00:47:53 -07:00

16476

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

16702

Regression test for 16702 (#16853)

2025-01-28 17:23:57 -08:00

17454

Fix hosting destructured decl with movable initializer (#17468)

2025-02-19 20:21:52 -08:00

18159

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

18239

Fixes #18239 (#20152)

2025-06-03 13:23:12 -07:00

19850

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

20144

Add test for #20144 (#20171)

2025-06-03 23:41:37 -07:00

22635

Fix MessagePort communication after transfer to Worker (#22638)

2025-09-17 03:33:14 -07:00

23077

Re-enable afterAll inside a test (#23110)

2025-09-30 19:41:35 -07:00

23314

fix: zstd decompression with async-compressed data (#23314) (#23317)

2025-10-06 19:56:40 -07:00

24387

Clear module cache when require'ing an es module with TLA throws (#24389)

2025-11-05 13:55:49 -08:00

24502

fix(install): bun pm ls with unresolved dependencies (#24541)

2025-11-10 11:19:57 -08:00

napi-exception-pending-crash

fix: napi_is_exception_pending crash during cleanup (#21961)

2025-08-18 16:47:45 -07:00

246-child_process_object_assign_compatibility.test.ts

Fix child_process stdio properties not enumerable for Object.assign() compatibility (#22322)

2025-09-06 01:40:36 -07:00

440.test.ts

fix(runtime): exclude globalThis from auto-serve detection (#26107)

2026-01-14 17:41:21 -08:00

1365.test.ts

fix(cli): show helpful error for unsupported file types instead of "File not found" (#26126)

2026-01-15 23:40:45 -08:00

1632.test.ts

fix(process): emit EPIPE error on broken pipe for process.stdout.write() (#26124)

2026-01-14 18:37:54 -08:00

2993.test.ts

fix(Request): set cache and mode options correctly (#26099)

2026-01-15 23:02:16 -08:00

3179.test.ts

fix(bundler): legal comments no longer break module.exports = require() redirect optimization (#26113)

2026-01-16 15:57:27 -08:00

3192.test.ts

fix(install): quote workspace: versions in yarn lockfile (#26106)

2026-01-14 18:22:32 -08:00

3613.test.ts

fix(ws): pass selected protocol from handleProtocols to upgrade response (#26118)

2026-01-15 18:22:01 -08:00

3657.test.ts

fix(fs.watch): emit 'change' events for files in watched directories on Linux (#26009)

2026-01-14 16:46:20 -08:00

5228.test.js

Implement xit/xtest/xdescribe aliases (#21529)

2025-08-25 17:37:12 -07:00

5344.test.ts

Fix duplicate exports when two entrypoints share symbols (#26089)

2026-01-20 12:40:33 -08:00

5738.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

5738.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

5961.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

5961.test.ts

Enable breaking_changes_1_3 (#23308)

2025-10-07 12:07:29 -07:00

8254.test.ts

fix(io): Prevent data corruption in Bun.write for files >2GB (#25720)

2025-12-27 16:58:36 -08:00

00631.test.ts

test: refactor spawnSync to spawn with describe.concurrent (#25849)

2026-01-06 15:37:56 +00:00

01466.test.ts

Fix AES-GCM encryption of empty messages (#13646)

2024-08-31 02:29:16 -07:00

02005.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

02367.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

02368.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

02369.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

02977.test.ts

fix(cli): handle BrokenPipe gracefully in bun completions (#26097)

2026-01-15 17:44:59 -08:00

03091.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

03216.test.ts

test: refactor spawnSync to spawn with describe.concurrent (#25849)

2026-01-06 15:37:56 +00:00

03830.test.ts

test: refactor spawnSync to spawn with describe.concurrent (#25849)

2026-01-06 15:37:56 +00:00

04011.test.ts

test: refactor spawnSync to spawn with describe.concurrent (#25849)

2026-01-06 15:37:56 +00:00

04893.test.ts

test: refactor spawnSync to spawn with describe.concurrent (#25849)

2026-01-06 15:37:56 +00:00

04947.test.js

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

06443.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

06467.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07001.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07261.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07263.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07324.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07397.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07736.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07740.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

07827.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

08040.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

08093.test.ts

add "configVersion" to bun.lock(b) (#24236)

2025-11-03 22:20:07 -08:00

08095.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

08757.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

08768.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

08794.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

09041.test.ts

Fix: after pausing stdin, a subprocess should be able to read from stdin (#23341)

2025-10-09 19:04:41 -07:00

09279.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

09340.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

09469.test.ts

Return expected data when using Promises with crypto.generateKeyPair (#13600)

2024-08-30 20:14:47 -07:00

09555.test.ts

feat: new binding generator (#15638)

2024-12-10 12:43:17 -08:00

09559.test.ts

feat: new binding generator (#15638)

2024-12-10 12:43:17 -08:00

09739.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

09748.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

09778.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

10132.test.ts

Fix bun run folder (#15117)

2025-01-17 22:08:07 -08:00

10139.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

10170.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

10887.test.ts

fix segfault when decorating computed property #10887 (#14304)

2024-10-04 18:14:20 -07:00

11029-crypto-verify-null-algorithm.test.ts

Fix crypto.verify() with null/undefined algorithm for RSA keys (#22331)

2025-09-02 23:30:52 -07:00

11664.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

11677.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

11793.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

11793.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

11806.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

11866.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

11866.ts

Fixes #11866 (#11867)

2024-06-14 01:50:36 -07:00

12042.test.ts

fix(fetch): print request body for application/x-www-form-urlencoded in curl logs (#22849)

2025-09-26 03:54:41 -07:00

12250.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

12548.test.ts

Fix TypeScript syntax not working with 'ts' loader in BunPlugin (#22460)

2025-09-07 21:43:38 -07:00

12650.test.js

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

12782.bar.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

12782.foo.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

12782.setup.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

12782.test.ts

run beforeAll before the first file and afterAll after the last file (#23113)

2025-09-30 21:47:31 -07:00

13316.test.ts

fix(bunx): handle empty string arguments on Windows (#25025)

2025-12-15 17:29:04 -08:00

14029.test.ts

Prevent test.only and snapshot updates in CI (#21811)

2025-09-24 15:19:16 -07:00

14135.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

14135.test.ts

Enable breaking_changes_1_3 (#23308)

2025-10-07 12:07:29 -07:00

14338.test.ts

Fix WebSocket to emit error event before close on handshake failure (#22325)

2025-09-02 03:26:51 -07:00

14515.test.tsx

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

14624.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

14945-lifecycle-script-crash.test.ts

fix(install): handle lifecycle script spawn failures gracefully instead of crashing (#21054)

2025-07-14 20:50:32 -07:00

15276.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

15314.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

15326.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

16007.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

16312.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

16474.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

17327.test.ts

Fix extra bracket in template literal syntax highlighting (#17327) (#21187)

2025-07-20 23:38:24 -07:00

17605.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

17766.test.ts

upgrade webkit (#17889)

2025-03-03 21:38:05 -08:00

18413-all-compressions.test.ts

fix: handle empty chunked gzip responses correctly (#22360)

2025-09-03 18:57:39 -07:00

18413-deflate-semantics.test.ts

fix: handle empty chunked gzip responses correctly (#22360)

2025-09-03 18:57:39 -07:00

18413-truncation.test.ts

fix: handle empty chunked gzip responses correctly (#22360)

2025-09-03 18:57:39 -07:00

18413.test.ts

fix: handle empty chunked gzip responses correctly (#22360)

2025-09-03 18:57:39 -07:00

18547.test.ts

perf_hooks.Histogram (#19920)

2025-05-26 21:18:22 -07:00

18595.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

18820.test.ts

Add clearAllMocks to mock. (#21555)

2025-08-01 19:30:51 -07:00

19107.test.ts

Fix expect(() => { throw undefined; }).toThrow(TypeError) (#21637)

2025-08-06 06:39:25 -07:00

19111.test.ts

fix(node:http): Fix ServerResponse.writableNeedDrain causing stream pause (#24137)

2025-10-27 15:24:38 -07:00

19219.test.ts

Fix HTMLRewriter error handling (issue #19219) (#22326)

2025-09-02 01:59:06 -07:00

19652.test.ts

Fix assertion failure when using --production flag (#23821)

2025-10-20 20:37:51 -07:00

19661.test.ts

ReadableStream & ReadableByteStream fixes (#19683)

2025-05-16 22:30:58 -07:00

19758.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

19758.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

19875.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

19875.test.ts

Enable breaking_changes_1_3 (#23308)

2025-10-07 12:07:29 -07:00

20053.test.ts

Fix zstd decompression truncation for multi-frame responses (#22680)

2025-09-15 14:24:03 -07:00

20092.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

20092.test.ts

Enable breaking_changes_1_3 (#23308)

2025-10-07 12:07:29 -07:00

20100.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

20100.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

20321.test.ts

Fix spawnSync crash when stdio is set to process.stderr (#22329)

2025-09-02 03:26:25 -07:00

20753.test.js

Fixes #20753 (#20789)

2025-07-03 01:06:22 -07:00

20875.test.ts

fix(http2): correct canReceiveData logic per RFC 7540 (#26491)

2026-01-27 10:29:34 -08:00

20980.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

20980.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

21137-minify-typeof-comma.test.ts

fix(parser): typeof minification regression (#23280)

2025-10-06 00:39:08 -07:00

21177.fixture-2.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

21177.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

21177.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

21257.test.ts

fix: Response.json() throws TypeError for non-JSON serializable top-level values (#21258)

2025-10-20 19:46:22 -07:00

21274.test.ts

fixes #21274 (#21278)

2025-07-23 22:31:42 -07:00

21311.test.ts

Deflake test/regression/issue/21311.test.ts

2025-10-18 17:53:47 -07:00

21677.test.ts

fix: prevent duplicate Date headers in HTTP responses (#21677) (#21836)

2025-08-14 16:34:38 -07:00

21680.test.ts

fix: HTMLRewriter no longer crashes when element handlers throw exceptions (#21848)

2025-08-15 22:35:38 -07:00

21792.test.ts

fix(serve): correct TLS array validation for SNI (#21796)

2025-08-15 21:25:54 -07:00

21830.fixture.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

21830.test.ts

Rewrite test/describe, add test.concurrent (#22534)

2025-09-20 00:35:42 -07:00

21907.test.ts

Fix CSS parser crash with large floating-point values (#21907) (#21909)

2025-08-15 20:59:50 -07:00

22003.test.ts

fix(sourcemap): escape tab characters in filenames for JSON (#23298)

2025-10-06 19:28:48 -07:00

22157.test.ts

Fix argv handling for standalone binaries - remove extra executable name (#22157) (#22169)

2025-08-27 15:31:28 -07:00

22199.test.ts

Fix crash when plugin onResolve returns undefined (#22670)

2025-09-15 23:37:10 -07:00

22243.test.ts

fix: prevent calling class constructors marked with call: false (#25047)

2025-11-24 23:34:16 -08:00

22353.test.ts

Fix server stability issue with oversized requests (#22701)

2025-09-26 04:59:07 -07:00

22475.test.ts

Fix cookie.isExpired() returning false for Unix epoch (#22478)

2025-09-07 17:42:09 -07:00

22481.test.ts

Fix: Socket.write() fails with Uint8Array (#22482)

2025-09-08 14:12:00 -07:00

22650-shell-crash.test.ts

Fix Windows shell crash with && operator and external commands (#22651)

2025-09-14 04:14:48 -07:00

22656.macro.ts

Fix panic when macros return collections with 3+ arrays/objects (#22827)

2025-09-24 18:25:39 -07:00

22656.test.ts

Fix panic when macros return collections with 3+ arrays/objects (#22827)

2025-09-24 18:25:39 -07:00

22712.test.ts

Fix dns.resolve callback parameters to match Node.js behavior (#22814)

2025-09-24 18:29:15 -07:00

22929-module-extensions-asi.test.ts

fix(parser): typescript module parsing bug (#23284)

2025-10-06 00:37:29 -07:00

22978-createargv-double-free.test.ts

Fix double-free in createArgv function (#22978)

2025-09-25 23:52:56 -07:00

23022-stack-trace-iterator.test.ts

Fix V8StackTraceIterator to handle frames without parentheses (#23034)

2025-09-27 00:55:54 -07:00

23133.test.ts

fix: allow lifecycle hooks to accept options as second parameter (#24039)

2025-10-24 19:30:43 -07:00

23183.test.ts

fix(crypto): hkdf callback should pass null (not undefined) on success (#23216)

2025-10-03 15:55:57 -07:00

23275.test.ts

Fix bunfig.toml parsing with UTF-8 BOM (#23276)

2025-10-05 17:22:37 -07:00

23287-array-comma-value.test.ts

fix(parser): unused arrays with no side effects (#23288)

2025-10-06 04:44:05 -07:00

23292.test.ts

fix(fs.access): handle Windows device paths correctly (#25023)

2025-11-26 00:07:51 -08:00

23316-long-path-spawn-shell.test.ts

fix(shell): handle UV_ENOTCONN gracefully in shell subprocess (#23520)

2025-10-12 05:40:02 -07:00

23316-long-path-spawn.test.ts

fix unpaired deref when write_file fails due to nametoolong (#23438)

2025-10-10 03:48:47 -07:00

23382.test.js

Fix 23382 (unicode object key printed as 'key" in snapshot instead of "key") (#23390)

2025-10-08 21:25:24 -07:00

23474.test.ts

fix: include cookies in WebSocket upgrade response (#23499)

2025-10-11 13:34:06 -07:00

23489.test.ts

fix(yaml): double-quoted strings with '...' incorrectly trigger document end error (#23491)

2025-10-20 14:19:22 -07:00

23569.test.ts

Fix: Error when using bun build --no-bundle with HTML entrypoint (#23572)

2025-10-19 23:29:29 -07:00

23621.test.ts

fix(23621): RedisClient Invalid URL (#23714)

2025-10-17 14:49:28 -07:00

23649.test.ts

Fixes #23649 (#23853)

2025-10-20 14:07:31 -07:00

23723.test.js

Updates eqlComptime to resolve the rope if needed (#23883)

2025-10-20 21:18:47 -07:00

23865.fixture.ts

Fix #23865 (#24355)

2025-11-05 22:04:14 -08:00

23865.test.ts

Fix #23865 (#24355)

2025-11-05 22:04:14 -08:00

24007.test.ts

fix: handle DT_UNKNOWN in dir_iterator for bind-mounted filesystems (#25838)

2026-01-22 13:44:49 -08:00

24045.test.ts

fix(node:assert): handle Number and Boolean wrappers in deepStrictEqual (#25201)

2025-11-30 16:58:58 -08:00

24129.test.ts

fix(fs): Dirent.isFIFO() incorrectly returns true for unknown type (#26263)

2026-01-19 15:44:27 -08:00

24131.test.ts

fix(update): 'l' key now selects package in interactive update (#26265)

2026-01-19 22:46:36 -08:00

24147.test.ts

Fix EventEmitter crash in removeAllListeners with removeListener meta-listener (#24148)

2025-10-28 12:32:15 -07:00

24191.test.ts

fix(node:url): return empty string for invalid domains in domainToASCII/domainToUnicode (#25196)

2025-12-15 17:26:32 -08:00

24234.test.ts

fix(console): implement %j format specifier for JSON output (#25195)

2025-11-28 22:57:55 -08:00

24314.test.ts

fix(pack): re-read package.json after prepack/prepare scripts (#26267)

2026-01-23 00:44:12 -08:00

24329.test.ts

fix(npm): remove shebang from placeholder scripts to fix npm i -g bun on Windows (#26517)

2026-01-28 00:00:50 -08:00

24338.test.ts

fix(assert): partialDeepStrictEqual now correctly handles Map subset checking (#26257)

2026-01-19 17:10:47 -08:00

24364.test.ts

fix(init): resolve TypeScript errors in react-tailwind template build.ts (#26258)

2026-01-19 17:12:42 -08:00

24385.test.ts

bug(ENG-21479): Fix Valkey URL Parsing (#24458)

2025-11-07 21:18:07 -08:00

24387.test.ts

Clear module cache when require'ing an es module with TLA throws (#24389)

2025-11-05 13:55:49 -08:00

24388.test.ts

fix(websocket): forward URL credentials as Authorization header (#26278)

2026-01-19 17:04:44 -08:00

24399.test.ts

fix: ensure EC private key JWK "d" field has correct length (#24400)

2025-11-05 13:49:13 -08:00

24575.test.ts

compatibility(node:net) _handle.fd property (#24575)

2025-11-12 12:28:55 -08:00

24593.test.ts

fix(ws): fix zlib version mismatch on Windows (segfault) (#25538)

2025-12-16 14:23:29 -08:00

24806.test.ts

fix(cli): correct --dry-run help text for bun publish (#25137)

2025-11-27 18:12:07 -08:00

24817.test.ts

Fixes #24817 (#24864)

2025-11-19 21:17:51 -08:00

24924.test.ts

fix(http2): return server from setTimeout for method chaining (#25138)

2025-11-27 16:46:15 -08:00

25190.test.ts

fix(node:tls): use SSL_session_reused for TLSSocket.isSessionReused (#25258)

2025-11-30 17:00:25 -08:00

25231.test.ts

fix(ffi): restore CString constructor functionality (#25257)

2025-12-01 15:47:27 -08:00

25398.test.ts

fix(transpiler): preserve simplified property values in object spread expressions (#25401)

2025-12-07 16:33:37 -08:00

25589-frame-size-connect.test.ts

fix(http2): fix settings, window size handling, and dynamic header buffer allocation (#26119)

2026-01-22 14:35:18 -08:00

25589-frame-size-grpc.test.ts

fix(http2): fix settings, window size handling, and dynamic header buffer allocation (#26119)

2026-01-22 14:35:18 -08:00

25589-frame-size-server.js

fix(http2): fix settings, window size handling, and dynamic header buffer allocation (#26119)

2026-01-22 14:35:18 -08:00

25589-write-end.test.ts

fix(http2): prevent extra empty DATA frame on write()+end() pattern (#26410)

2026-01-26 11:09:03 -08:00

25589.test.ts

fix(http2): fix settings, window size handling, and dynamic header buffer allocation (#26119)

2026-01-22 14:35:18 -08:00

25609.test.ts

Fix DCE producing invalid syntax for empty objects in spreads (#25710)

2025-12-26 21:48:19 -08:00

25628.test.ts

fix(bundler): include lazy chunks in frontend.files for compiled fullstack builds (#26024)

2026-01-14 16:08:06 -08:00

25639.test.ts

fix(timers): add _idleStart property to Timeout object (#26021)

2026-01-12 19:35:11 -08:00

25648.test.ts

fix(bundler): rename named function expressions when shadowing outer symbol (#26027)

2026-01-14 12:52:41 -08:00

25707.test.ts

fix(linker): defer dynamic import() of unknown node: modules to runtime (#26981)

2026-02-12 14:47:31 -08:00

25716.test.ts

Update 25716.test.ts

2026-01-13 22:38:31 -08:00

25750.test.ts

fix(s3): add contentDisposition and type support to presign() (#25999)

2026-01-15 15:33:43 -08:00

25785.test.ts

fix(css): preserve logical border-radius properties (#26006)

2026-01-14 13:34:31 -08:00

25794.test.ts

fix(css): restore handler context after minifying nested rules (#25997)

2026-01-12 14:55:27 -08:00

25831.test.ts

fix(shell): implement long listing format for ls -l builtin (#25991)

2026-01-14 13:31:06 -08:00

25862.test.ts

fix(http): properly handle pipelined data in CONNECT requests (#25938)

2026-01-09 19:08:02 -08:00

25869.test.ts

fix(test): delete setTimeout.clock property when disabling fake timers (#26285)

2026-01-20 12:51:54 -08:00

25903.test.ts

fix(io): respect mode option when copying files with Bun.write() (#25906)

2026-01-08 17:51:42 -08:00

26030.test.ts

fix(sql): prevent hang in sequential MySQL transactions with returned array queries (#26048)

2026-01-14 12:53:04 -08:00

26063.test.ts

fix(sql): MySQL VARCHAR with binary collations returns string instead of Buffer (#26064)

2026-01-14 12:50:36 -08:00

26088.test.ts

fix(yaml): fix memory leak in YAML parser (#26090)

2026-01-14 17:13:30 -08:00

26125.test.ts

fix(http): use correct client certificate for mTLS fetch() requests (#26129)

2026-01-14 19:22:08 -08:00

26142.test.ts

fix: don't call Bun.serve() on exported Server instances (#26144)

2026-01-15 20:28:32 -08:00

26143.test.ts

fix(http): allow body on GET/HEAD/OPTIONS requests for Node.js compatibility (#26145)

2026-01-15 17:46:07 -08:00

26225.test.ts

fix(node-fetch): convert old-style Node.js streams to Web streams (#26226)

2026-01-18 13:19:02 -08:00

26249.test.ts

fix(ffi): respect C_INCLUDE_PATH and LIBRARY_PATH env vars (#26250)

2026-01-19 11:24:02 -08:00

26284.test.ts

fix(test): delete setTimeout.clock property when disabling fake timers (#26285)

2026-01-20 12:51:54 -08:00

26286.test.ts

fix(Terminal): callbacks not invoked inside AsyncLocalStorage.run() (#26288)

2026-01-19 22:45:22 -08:00

26298.test.ts

fix(compile): ensure bytecode alignment accounts for section header (#26299)

2026-01-20 22:42:38 -08:00

26337.test.ts

fix(install): show dependency name when file: path resolution fails (#26340)

2026-01-21 18:41:15 -08:00

26358.test.ts

fix(ws): allow ws.once() to work multiple times (#26359)

2026-01-23 00:22:36 -08:00

26360.test.ts

fix(bundler): throw error when Bun.build is called from macro during bundling (#26361)

2026-01-23 20:24:12 -08:00

26377.test.ts

fix(streams): return null from controller.desiredSize when stream is detached (#26378)

2026-01-23 00:26:52 -08:00

26387.test.ts

fix(http): set #js_ref in Request.toJS for server-created requests (#26390)

2026-01-23 12:09:03 -08:00

26411.test.ts

fix(readline): use symbol key for _refreshLine in tab completer (#26412)

2026-01-24 15:37:29 -08:00

26460.test.ts

fix(shell): handle ".", "", "./" in cwd() by using process.cwd() (#26461)

2026-01-26 16:04:45 -08:00

26631.test.ts

fix(fs): handle '.' path normalization on Windows (#26634)

2026-02-01 00:33:59 -08:00

26669.test.ts

fix(websocket): add missing incPendingActivityCount() in blob binaryType case (#26670)

2026-02-05 20:39:19 -08:00

26851.test.ts

fix(test): write JUnit reporter outfile when --bail triggers early exit (#26852)

2026-02-11 17:41:45 -08:00

27014.test.ts

fix(stripANSI): handle SIMD false positives for non-ANSI control chars (#27021)

2026-02-14 02:01:25 -08:00

27025.test.ts

fix(crypto): fix segfault in X509Certificate.issuerCertificate getter (#27025)

2026-02-14 05:58:41 -08:00

012039.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

012040.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

012360.test.ts

run prettier and add back format action (#13722)

2024-09-03 21:32:52 -07:00

013880-fixture.cjs

Fix several bugs when printing exceptions from Error.captureStackTrace (#14548)

2024-10-14 13:43:06 -07:00

013880.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

014187.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

014865.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

015201.test.ts

Fix setTimeout with node:util.promisify (#15230)

2024-11-18 19:29:55 -08:00

026039.test.ts

fix(install): use scope-specific registry for scoped packages in frozen lockfile (#26047)

2026-01-14 10:22:30 -08:00

abort-controller-fixture.js

Fixes #9739 (#9752)

2024-03-30 20:57:40 -07:00

atomics-waitasync-wtftimer-uaf.test.ts

Fix WTFTimer issues with Atomics.waitAsync (#23442)

2025-10-10 03:47:38 -07:00

bundler-plugin-onresolve-entrypoint.test.ts

fix: support virtual entrypoints in onResolve() (#22144)

2025-08-26 16:51:41 -07:00

circular-error-stack-edge-cases.test.ts

Fix infinite recursion when error.stack is a circular reference (#22863)

2025-09-22 22:22:58 -07:00

circular-error-stack.test.ts

Fix infinite recursion when error.stack is a circular reference (#22863)

2025-09-22 22:22:58 -07:00

comma-operator-this-binding.test.ts

Fix comma operator optimization to preserve 'this' binding semantics (#21653)

2025-08-09 05:11:50 -07:00

compile-outfile-subdirs.test.ts

Fix Windows compilation issues with embedded resources and relative paths (#22365)

2025-09-04 18:17:14 -07:00

crypto-names.test.ts

Fix formatters not running in CI + delete unnecessary files (#19433)

2025-05-08 23:22:16 -07:00

css-system-color-contexts.test.ts

fix: CSS parser crashes with calc() NaN values and system colors in color-mix() (#21079)

2025-07-15 22:02:03 -07:00

css-system-color-mix-crash.test.ts

fix: CSS parser crashes with calc() NaN values and system colors in color-mix() (#21079)

2025-07-15 22:02:03 -07:00

ctrl-c.test.ts

feat: support Svelte in bundler and dev server (#17735)

2025-03-04 14:16:18 -08:00

cyclic-imports-async-bundler.test.js

Reduce the number of closures in generated bundler code (#27022)

2026-02-15 00:36:57 -08:00

ENG-24434.test.ts

fix(jest): handle null SourceOrigin in jest.mock() to prevent crash (#25281)

2025-12-01 11:54:03 -08:00

fix-bindings-stack-trace.test.ts

Fix bindings package compatibility by preventing empty stack trace filenames (#22106)

2025-10-06 16:22:24 -07:00

fuzzer-ENG-22942.test.ts

fix(test): fix assertion failure in expect.extend with non-JSFunction callables (#25099)

2025-11-26 13:34:02 -08:00

hashbang-still-works.test.ts

test: refactor spawnSync to spawn with describe.concurrent (#25849)

2026-01-06 15:37:56 +00:00

htmlrewriter-additional-bugs.test.ts

fix: HTMLRewriter no longer crashes when element handlers throw exceptions (#21848)

2025-08-15 22:35:38 -07:00

invalid-escape-sequences.test.ts

Make the error better when you do console.log(\" (#22787)

2025-09-20 00:29:15 -07:00

issue-1825-jest-mock-functions.test.ts

Fix missing Jest mock functions in bun:test (#22306)

2025-09-02 01:53:39 -07:00

issue-12276.test.ts

Fix toIncludeRepeated (#21366)

2025-07-25 22:22:04 -07:00

jsx-template-string-crash.test.ts

Fix panic in JavaScript lexer when parsing invalid template strings in JSX (#21967)

2025-08-19 18:47:04 -07:00

malformed-integrity-base64.test.ts

fix(install): prevent base64 integrity parsing panic on oversized input (#21936)

2025-08-18 03:04:37 -07:00

minify-new-array-with-if.test.ts

fix(bundler): minify Array constructor with ternary regression (#22803)

2025-09-19 17:32:12 -07:00

napi-exception-pending-crash.test.ts

fix: napi_is_exception_pending crash during cleanup (#21961)

2025-08-18 16:47:45 -07:00

patch-bounds-check.test.ts

fix patch-bounds-check.test.ts (#26344)

2026-01-21 13:22:21 -08:00

pe-codesigning-integrity.test.ts

fix(compile): use 8-byte header for embedded section to ensure bytecode alignment (#25377)

2025-12-06 16:37:09 -08:00

postgres-null-byte-injection.test.ts

fix(sql): reject null bytes in connection parameters to prevent protocol injection (#26952)

2026-02-12 00:27:00 -08:00

postgres-stringbuilder-assertion-aggressive.test.ts

Fix PostgreSQL StringBuilder assertion failure with empty error messages (#22558)

2025-09-10 18:47:50 -07:00

prepare-stack-trace-crash.test.ts

Fix issue with Error.prepareStackTrace (#21829)

2025-08-19 18:08:00 -07:00

require-extensions-override.test.ts

fix loaders used by Module._extensions (#23291)

2025-10-06 06:40:15 -07:00

s3-header-injection.test.ts

fix(s3): reject CRLF characters in header values to prevent header injection (#26942)

2026-02-11 23:02:39 -08:00

s3-signature-order.test.ts

fix(s3): ensure correct alphabetical query parameter order in presigned URLs (#21050)

2025-07-15 16:20:34 -07:00

s3-signature-performance.test.ts

fix(s3): ensure correct alphabetical query parameter order in presigned URLs (#21050)

2025-07-15 16:20:34 -07:00

server-stop-with-pending-requests.test.ts

fix: prevent assertion failure when stopping server with pending requests (#22070)

2025-08-22 22:39:47 -07:00

stdin-pause-resume.test.ts

Fix process.stdin not receiving data after pause/resume (#23362)

2025-10-07 22:04:40 -07:00

test_env_loader_threading.test.ts

Fix env_loader allocator threading issue with BUN_INSPECT_CONNECT_TO (#22206)

2025-08-28 17:16:37 -07:00

test-21049.test.ts

Deflake test-21049.test.ts

2025-07-20 23:02:10 -07:00

test-process-stdout-async-iterator.test.ts

Fix process.stdout/stderr missing Symbol.asyncIterator (#21720)

2025-08-09 06:40:36 -07:00

text-chunk-null-access.test.ts

Fix HTMLRewriter TextChunk null pointer crash (#22254)

2025-08-30 01:05:51 -07:00

tty-readstream-ref-unref.test.ts

Fix TTY reopening after stdin EOF (#22591)

2025-09-13 01:00:57 -07:00

tty-reopen-after-stdin-eof.test.ts

Fix TTY reopening after stdin EOF (#22591)

2025-09-13 01:00:57 -07:00

tui-app-tty-pattern.test.ts

Fix TTY reopening after stdin EOF (#22591)

2025-09-13 01:00:57 -07:00

update-interactive-formatting.test.ts

Introduce bun update --interactive (#20850)

2025-07-17 04:33:30 -07:00

utf16-encoding-crash.test.ts

Fix UTF-16 encoding crash with odd-length byte arrays (#21966)

2025-08-20 00:02:14 -07:00

yaml-parse-syntax-error.test.ts

Fix YAML.parse to throw SyntaxError instead of BuildMessage (#22924)

2025-09-24 16:29:05 -07:00