## Summary
- Extends `fetch()` proxy option to accept an object format: `proxy: {
url: string, headers?: Headers }`
- Allows sending custom headers to the proxy server (useful for proxy
authentication, custom routing headers, etc.)
- Headers are sent in CONNECT requests (for HTTPS targets) and direct
proxy requests (for HTTP targets)
- User-provided `Proxy-Authorization` header overrides auto-generated
credentials from URL
## Usage
```typescript
// Old format (still works)
fetch(url, { proxy: "http://proxy.example.com:8080" });
// New object format with headers
fetch(url, {
proxy: {
url: "http://proxy.example.com:8080",
headers: {
"Proxy-Authorization": "Bearer token",
"X-Custom-Proxy-Header": "value"
}
}
});
```
## Test plan
- [x] Test proxy object with url string works same as string proxy
- [x] Test proxy object with headers sends headers to proxy (HTTP
target)
- [x] Test proxy object with headers sends headers in CONNECT request
(HTTPS target)
- [x] Test proxy object with Headers instance
- [x] Test proxy object with empty headers
- [x] Test proxy object with undefined headers
- [x] Test user-provided Proxy-Authorization overrides URL credentials
- [x] All existing proxy tests pass (25 total)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
### What does this PR do?
- Bumps some packages
- Does some _best practices_ in certain areas to minimize Aikido noise.
### How did you verify your code works?
CI.
---------
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
pulled out of https://github.com/oven-sh/bun/pull/21809
- brings the ASAN behavior on linux closer in sync with macos
- fixes some tests to also pass in node
---------
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
### What does this PR do?
Restore call to us_get_default_ca_certificates, and
X509_STORE_set_default_paths
Fixes https://github.com/oven-sh/bun/issues/23735
### How did you verify your code works?
Manually test running:
```bash
bun -e "await fetch('https://secure-api.eloview.com').then(res => res.t
ext()).then(console.log);"
```
should not result in:
```js
error: unable to get local issuer certificate
path: "https://secure-api.eloview.com/",
errno: 0,
code: "UNABLE_TO_GET_ISSUER_CERT_LOCALLY"
```
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Enhanced system root certificate handling to ensure consistent
validation across all secure connections.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Summary
Adds a `subscriptions` getter to `ServerWebSocket` that returns an array
of all topics the WebSocket is currently subscribed to.
## Implementation
- Added `getTopicsCount()` and `iterateTopics()` helpers to uWS
WebSocket
- Implemented C++ function `uws_ws_get_topics_as_js_array` that:
- Uses `JSC::MarkedArgumentBuffer` to protect values from GC
- Constructs JSArray directly in C++ for efficiency
- Uses template pattern for SSL/TCP variants
- Properly handles iterator locks with explicit scopes
- Exposed as `subscriptions` getter property on ServerWebSocket
- Returns empty array when WebSocket is closed (not null)
## API
```typescript
const server = Bun.serve({
websocket: {
open(ws) {
ws.subscribe("chat");
ws.subscribe("notifications");
console.log(ws.subscriptions); // ["chat", "notifications"]
ws.unsubscribe("chat");
console.log(ws.subscriptions); // ["notifications"]
}
}
});
```
## Test Coverage
Added 5 comprehensive test cases covering:
- Basic subscription/unsubscription flow
- All subscriptions removed
- Behavior after WebSocket close
- Duplicate subscriptions (should only appear once)
- Multiple subscribe/unsubscribe cycles
All tests pass with 24 assertions.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
### What does this PR do?
### How did you verify your code works?
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved HTTP connection handling during write failures to ensure more
reliable timeout behavior and connection state management.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Summary
Implements `onTestFinished()` for `bun:test`, which runs after all
`afterEach` hooks have completed.
## Implementation
- Added `onTestFinished` export to the test module in `jest.zig`
- Modified `genericHook` in `bun_test.zig` to handle `onTestFinished` as
a special case that:
- Can only be called inside a test (not in describe blocks or preload)
- Appends hooks at the very end of the execution sequence
- Added comprehensive tests covering basic ordering, multiple callbacks,
async callbacks, and interaction with other hooks
## Execution Order
When called inside a test:
1. Test body executes
2. `afterAll` hooks (if added inside the test)
3. `afterEach` hooks
4. `onTestFinished` hooks ✨
## Test Plan
- ✅ All new tests pass with `bun bd test`
- ✅ Tests correctly fail with `USE_SYSTEM_BUN=1` (feature not in
released version)
- ✅ Verifies correct ordering with `afterEach`, `afterAll`, and multiple
`onTestFinished` calls
- ✅ Tests async `onTestFinished` callbacks
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: pfg <pfg@pfg.pw>
## Summary
This PR implements support for `localAddress` and `localPort` options in
TCP connections, allowing users to bind outgoing connections to a
specific local IP address and port.
This addresses issue #6888 and implements Node.js-compatible behavior
for these options.
## Changes
### C Layer (uSockets)
- **`bsd.c`**: Modified `bsd_create_connect_socket()` to accept a
`local_addr` parameter and call `bind()` before `connect()` when a local
address is specified
- **`context.c`**: Updated `us_socket_context_connect()` and
`start_connections()` to parse and pass local address parameters through
the connection flow
- **`libusockets.h`**: Updated public API signatures to include
`local_host` and `local_port` parameters
- **`internal.h`**: Added `local_host` and `local_port` fields to
`us_connecting_socket_t` structure
- **`openssl.c`**: Updated SSL connection function to match the new
signature
### Zig Layer
- **`SocketContext.zig`**: Updated `connect()` method to accept and pass
through `local_host` and `local_port` parameters
- **`socket.zig`**: Modified `connectAnon()` to handle local address
binding, including IPv6 bracket removal and proper memory management
- **`Handlers.zig`**: Added `localAddress` and `localPort` fields to
`SocketConfig` and implemented parsing from JavaScript options
- **`Listener.zig`**: Updated connection structures to store and pass
local binding information
- **`socket.zig` (bun.js/api/bun)**: Modified `doConnect()` to extract
and pass local address options
- Updated all other call sites (HTTP, MySQL, PostgreSQL, Valkey) to pass
`null, 0` for backward compatibility
### JavaScript Layer
- **`net.ts`**: Enabled `localAddress` and `localPort` support by
passing these options to `doConnect()` and removing TODO comments
### Tests
- **`06888-localaddress.test.ts`**: Added comprehensive tests covering:
- IPv4 local address binding
- IPv4 local address and port binding
- IPv6 local address binding (loopback)
- Backward compatibility (connections without local address)
## Test Results
All tests pass successfully:
```
✓ TCP socket can bind to localAddress - IPv4
✓ TCP socket can bind to localAddress and localPort - IPv4
✓ TCP socket can bind to localAddress - IPv6 loopback
✓ TCP socket without localAddress works normally
4 pass, 0 fail
```
## API Usage
```typescript
import net from "net";
// Connect with a specific local address
const client = net.createConnection({
host: "example.com",
port: 80,
localAddress: "192.168.1.100", // Bind to this local IP
localPort: 0, // Let system assign port (optional)
});
```
## Implementation Details
The implementation follows the same flow as Node.js:
1. JavaScript options are parsed in `Handlers.zig`
2. Local address/port are stored in the connection configuration
3. The Zig layer processes and passes them to the C layer
4. The C layer parses the local address and calls `bind()` before
`connect()`
5. Both IPv4 and IPv6 addresses are supported
Memory management is handled properly throughout the stack, with
appropriate allocation/deallocation at each layer.
Closes#6888🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
### What does this PR do?
Calls `uncork()` after flushing response headers to ensure data is sent
as soon as possible, improving responsiveness.
This behavior still works correctly even without the explicit `uncork()`
call, due to the deferred uncork logic implemented here:
6e3359dd16/packages/bun-uws/src/Loop.h (L57-L64)
A test already covers this scenario in
`test/js/node/test/parallel/test-http-flush-response-headers.js`.
### How did you verify your code works?
CI
---------
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
### What does this PR do?
BeforeOpen code is not necessary since we have `setOnSocketUpgraded`
callback now,and we should NOT convert websocket to a response, make
sure that no closed socket is passed to `JSNodeHTTPServerSocket`, change
isIdle to be inside AsyncSocketData to be more reliable (works for
websocket and normal sockets)
### How did you verify your code works?
CI
---------
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Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
## Summary
Fixes a macOS kernel (XNU) bug where `accept()` can return a valid
socket descriptor but with `addrlen=0`, indicating an already-dead
socket.
This occurs when an IPv4 connection to an IPv6 dual-stack listener is
immediately aborted (RST packet). The fix detects this condition on
Darwin and handles it intelligently - preserving buffered data when
present, discarding truly dead sockets when not.
## Background
This implements the equivalent of the bugfix from capnproto:
https://github.com/capnproto/capnproto/pull/2365
The issue manifests as:
1. IPv4 connection made to IPv6 dual-stack listener
2. Connection immediately aborted (sends RST packet)
3. `accept()` returns valid socket descriptor but `addrlen=0`
4. Socket may have buffered data from `connectx()` or be truly dead
## Enhanced Data-Preserving Solution
Unlike simple "close immediately" approaches, this fix **prevents data
loss** from the `connectx()` edge case:
**Race Condition Scenario:**
1. Client uses `connectx()` to send data immediately during connection
2. Network abort (RST) occurs after data is buffered but before full
connection establishment
3. Darwin kernel returns `socklen=0` but socket has buffered data
4. **Our fix preserves this data instead of losing it**
**Logic:**
```c
if (addr->len == 0) {
/* Check if there's any pending data before discarding the socket */
char peek_buf[1];
ssize_t has_data = recv(accepted_fd, peek_buf, 1, MSG_PEEK | MSG_DONTWAIT);
if (has_data <= 0) {
/* No data available, socket is truly dead - discard it */
bsd_close_socket(accepted_fd);
continue; /* Try to accept the next connection */
}
/* If has_data > 0, let the socket through - there's buffered data to read */
}
```
## XNU Kernel Source Analysis
After investigating the Darwin XNU kernel source code, I found this bug
affects **multiple system calls**, not just `accept()`. The bug is
rooted in the kernel's socket layer when protocol-specific functions
return NULL socket addresses.
### Affected System Calls
#### 1. accept() and accept_nocancel() ✅ FIXED
**Location:**
[`/bsd/kern/uipc_syscalls.c:596-605`](https://github.com/apple/darwin-xnu/blob/main/bsd/kern/uipc_syscalls.c#L596-L605)
```c
(void) soacceptlock(so, &sa, 0);
socket_unlock(head, 1);
if (sa == NULL) {
namelen = 0; // ← BUG: Returns socklen=0
if (uap->name) {
goto gotnoname;
}
error = 0;
goto releasefd;
}
```
#### 2. getsockname() ⚠️ ALSO AFFECTED
**Location:**
[`/bsd/kern/uipc_syscalls.c:2601-2603`](https://github.com/apple/darwin-xnu/blob/main/bsd/kern/uipc_syscalls.c#L2601-L2603)
```c
if (sa == 0) {
len = 0; // ← SAME BUG: Returns socklen=0
goto gotnothing;
}
```
#### 3. getpeername() ⚠️ ALSO AFFECTED
**Location:**
[`/bsd/kern/uipc_syscalls.c:2689-2691`](https://github.com/apple/darwin-xnu/blob/main/bsd/kern/uipc_syscalls.c#L2689-L2691)
```c
if (sa == 0) {
len = 0; // ← SAME BUG: Returns socklen=0
goto gotnothing;
}
```
### System Calls NOT Affected
#### connect() and connectx() ✅ SAFE
**Locations:**
-
[`/bsd/kern/uipc_syscalls.c:686-744`](https://github.com/apple/darwin-xnu/blob/main/bsd/kern/uipc_syscalls.c#L686-L744)
(connect)
-
[`/bsd/kern/uipc_syscalls.c:747+`](https://github.com/apple/darwin-xnu/blob/main/bsd/kern/uipc_syscalls.c#L747)
(connectx)
**Why they're safe:** These functions read socket addresses from
userspace via `getsockaddr()` and pass them to the protocol layer. They
don't receive socket addresses from the network stack, so they can't
encounter the `socklen=0` condition.
### Root Cause
The bug occurs when protocol layer functions (`pru_accept`,
`pru_sockaddr`, `pru_peeraddr`) return NULL socket addresses during
IPv4→IPv6 dual-stack connection race conditions. The kernel returns
`socklen=0` instead of treating it as an error case.
**Key XNU source reference:**
[`/bsd/kern/uipc_socket.c:1544`](https://github.com/apple/darwin-xnu/blob/main/bsd/kern/uipc_socket.c#L1544)
```c
error = (*so->so_proto->pr_usrreqs->pru_accept)(so, nam);
```
**Socket state vs buffered data:** From
[`/bsd/kern/uipc_socket2.c:2227`](https://github.com/apple/darwin-xnu/blob/main/bsd/kern/uipc_socket2.c#L2227):
```c
// Even with SS_CANTRCVMORE set, data can be buffered in so->so_rcv.sb_cc
return so->so_rcv.sb_cc >= so->so_rcv.sb_lowat ||
((so->so_state & SS_CANTRCVMORE) && cfil_sock_data_pending(&so->so_rcv) == 0)
```
## Changes
- Added Darwin-specific check in `bsd_accept_socket()` in
`packages/bun-usockets/src/bsd.c:708-720`
- When `addr->len == 0` after successful `accept()`:
1. Check for buffered data with `recv(MSG_PEEK | MSG_DONTWAIT)`
2. If data exists, let socket through normally (prevents data loss)
3. If no data, close socket and continue accepting
- Only applies to `__APPLE__` builds to avoid affecting other platforms
## Test plan
- [x] Debug build compiles successfully
- [x] Basic HTTP server operations work correctly (exercises accept
path)
- [x] Regression test covers IPv4→IPv6 dual-stack connection abort
scenarios
- [x] Test verifies server doesn't crash/hang when encountering
socklen=0 condition
- [x] Enhanced fix preserves buffered data from connectx() edge cases
The regression test
(`test/regression/issue/darwin-accept-socklen-zero.test.ts`) creates the
exact conditions that trigger this kernel bug:
1. IPv6 dual-stack server (`hostname: "::"`)
2. IPv4 connections (`127.0.0.1`) with immediate abort (RST packets)
3. Concurrent connection attempts to maximize race condition probability
4. Verification that server remains stable and responsive
## Impact Assessment
### For Bun's uSockets Implementation
- **accept() path:** ✅ FIXED with data loss prevention - This PR handles
the primary case affecting network servers
- **connect() path:** ✅ NOT VULNERABLE - connect() doesn't receive
kernel sockaddrs
- **connectx() path:** ✅ NOT VULNERABLE - connectx() doesn't receive
kernel sockaddrs
- **connectx() data:** ✅ PRESERVED - Enhanced fix prevents losing
buffered data from immediate sends
### Additional Considerations
While `getsockname()` and `getpeername()` have the same kernel bug,
they're less critical for server stability since servers primarily use
`accept()` for incoming connections.
🤖 Generated with [Claude Code](https://claude.ai/code)
---------
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Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
Add a new generator for JS → Zig bindings. The bulk of the conversion is
done in C++, after which the data is transformed into an FFI-safe
representation, passed to Zig, and then finally transformed into
idiomatic Zig types.
In its current form, the new bindings generator supports:
* Signed and unsigned integers
* Floats (plus a “finite” variant that disallows NaN and infinities)
* Strings
* ArrayBuffer (accepts ArrayBuffer, TypedArray, or DataView)
* Blob
* Optional types
* Nullable types (allows null, whereas Optional only allows undefined)
* Arrays
* User-defined string enumerations
* User-defined unions (fields can optionally be named to provide a
better experience in Zig)
* Null and undefined, for use in unions (can more efficiently represent
optional/nullable unions than wrapping a union in an optional)
* User-defined dictionaries (arbitrary key-value pairs; expects a JS
object and parses it into a struct)
* Default values for dictionary members
* Alternative names for dictionary members (e.g., to support both
`serverName` and `servername` without taking up twice the space)
* Descriptive error messages
* Automatic `fromJS` functions in Zig for dictionaries
* Automatic `deinit` functions for the generated Zig types
Although this bindings generator has many features not present in
`bindgen.ts`, it does not yet implement all of `bindgen.ts`'s
functionality, so for the time being, it has been named `bindgenv2`, and
its configuration is specified in `.bindv2.ts` files. Once all
`bindgen.ts`'s functionality has been incorporated, it will be renamed.
This PR ports `SSLConfig` to use the new bindings generator; see
`SSLConfig.bindv2.ts`.
(For internal tracking: fixes STAB-1319, STAB-1322, STAB-1323,
STAB-1324)
---------
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Co-authored-by: Alistair Smith <hi@alistair.sh>
### What does this PR do?
handle socket upgrade in NodeHTTP.cpp
### How did you verify your code works?
Run the test added with asan it should catch the bug
---------
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
### What does this PR do?
fix#23001 by removing references to old codelens from before the native
integration which should have its own (better and) native way of
starting
### How did you verify your code works?
### What does this PR do?
**This PR is created because [the previous PR I
opened](https://github.com/oven-sh/bun/pull/21728) had some concerning
issues.** Thanks @Jarred-Sumner for the help.
The goal of this PR is to introduce PUB/SUB functionality to the
built-in Redis client. Based on the fact that the current Redis API does
not appear to have compatibility with `io-redis` or `redis-node`, I've
decided to do away with existing APIs and API compatibility with these
existing libraries.
I have decided to base my implementation on the [`redis-node` pub/sub
API](https://github.com/redis/node-redis/blob/master/docs/pub-sub.md).
#### Random Things That Happened
- [x] Refactored the build scripts so that `valgrind` can be disabled.
- [x] Added a `numeric` namespace in `harness.ts` with useful
mathematical libraries.
- [x] Added a mechanism in `cppbind.ts` to disable static assertions
(specifically to allow `check_slow` even when returning a `JSValue`).
Implemented via `// NOLINT[NEXTLINE]?\(.*\)` macros.
- [x] Fixed inconsistencies in error handling of `JSMap`.
### How did you verify your code works?
I've written a set of unit tests to hopefully catch the major use-cases
of this feature. They all appear to pass.
#### Future Improvements
I would have a lot more confidence in our Redis implementation if we
tested it with a test suite running over a network which emulates a high
network failure rate. There are large amounts of edge cases that are
worthwhile to grab, but I think we can roll that out in a future PR.
### Future Tasks
- [ ] Tests over flaky network
- [ ] Use the custom private members over `_<member>`.
---------
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
### What does this PR do?
Resume work on https://github.com/oven-sh/bun/pull/21898
### How did you verify your code works?
Manually tested on MacOS, Windows 11 and Ubuntu 25.04. CI changes are
needed for the tests
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
## Summary
Adds a new `test.serial()` API that forces tests to run serially even
when the `--concurrent` flag is passed. This is the opposite of
`test.concurrent()` which forces parallel execution.
## Motivation
Some tests genuinely need to run serially even in CI environments with
`--concurrent`:
- Database migration tests that must run in order
- Tests that modify shared global state
- Tests that use fixed ports or file system resources
- Tests that depend on timing or resource constraints
## Implementation
Changed `self_concurrent` from `bool` to `?bool`:
- `null` = default behavior (inherit from parent or use default)
- `true` = force concurrent execution
- `false` = force serial execution
## API Surface
```javascript
// Force serial execution
test.serial("database migration", async () => {
// This runs serially even with --concurrent flag
});
// All modifiers work
test.serial.skip("skip this serial test", () => {});
test.serial.todo("implement this serial test");
test.serial.only("only run this serial test", () => {});
test.serial.each([[1], [2]])("serial test %i", (n) => {});
test.serial.if(condition)("conditional serial", () => {});
// Works with describe too
describe.serial("serial test suite", () => {
test("test 1", () => {}); // runs serially
test("test 2", () => {}); // runs serially
});
// Explicit test-level settings override describe-level
describe.concurrent("concurrent suite", () => {
test.serial("this runs serially", () => {}); // serial wins
test("this runs concurrently", () => {});
});
```
## Test Coverage
Comprehensive tests added including:
- Basic `test.serial()` functionality
- All modifiers (skip, todo, only, each, if)
- `describe.serial()` blocks
- Mixing serial and concurrent tests in same describe block
- Nested describe blocks with conflicting settings
- Explicit overrides (test.serial in describe.concurrent and vice versa)
All 36 tests pass ✅
## Example
```javascript
// Without this PR - these tests might run in parallel with --concurrent
test("migrate database schema v1", async () => { await migrateV1(); });
test("migrate database schema v2", async () => { await migrateV2(); });
test("migrate database schema v3", async () => { await migrateV3(); });
// With this PR - guaranteed serial execution
test.serial("migrate database schema v1", async () => { await migrateV1(); });
test.serial("migrate database schema v2", async () => { await migrateV2(); });
test.serial("migrate database schema v3", async () => { await migrateV3(); });
```
🤖 Generated with [Claude Code](https://claude.ai/code)
---------
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Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
### What does this PR do?
This PR does two things.
First, it fixes a bug when using
[`jest-dom`](https://github.com/testing-library/jest-dom) where
expectation failures would break as `RECEIVED_COLOR` and
`EXPECTED_COLOR` are not properties of `ExpectMatcherContext`.
<img width="1216" height="139" alt="image"
src="https://github.com/user-attachments/assets/26ef87c2-f763-4a46-83a3-d96c4c534f3d"
/>
Second, it adds some existing timer mock functions that were missing
from the `vi` object.
### How did you verify your code works?
I've added a test.
### What does this PR do?
#22534 made `--test-name-pattern` more logical and not start with empty
` ` (space), so fixing the built regex to make it work still for old and
new bun
The other main issue that that pr did was make start events for filtered
out names which means it appears to rerun them all even when in reality
it doesn't as they are skipped
Also in theory with concurrent test, if there's an error after another
started it would be assigned to the wrong test because we don't get test
id's in the error event, so its just assumed its from the last started
one which with parallel means it isn't correct.
### How did you verify your code works?
