Add ForeignRef<T> and make FetchHeaders the owned handle

.claude/skills/verify/SKILL.md

@@ -0,0 +1,59 @@
+---
+name: verify
+description: Build Bun and drive the changed code at its real surface (CLI, socket, FFI) to observe it running.
+---
+
+# Verifying a change to Bun
+
+**Build:** `bun bd` (no timeout — it can take many minutes). Exit 0 is setup, not evidence.
+
+**Drive:** `bun bd run <script.js>` builds *and* runs, forwarding args to the debug binary.
+Put driver scripts under `~/code/tmp/**` — Santa blocks unsigned executables elsewhere.
+
+## Two ways to invoke the debug build
+
+| Need | Use |
+|---|---|
+| run a script, stay in the repo | `bun bd run /path/to/drive.js` |
+| any command, from another cwd | `/Users/jarred/code/bun/build/debug/bun-debug <cmd>` |
+
+`bun bd` is a **package.json script** — it only resolves with the repo root as cwd.
+A probe that `cd`s into a temp dir must call the binary by absolute path.
+The binary refuses `bun-debug test <file>` on purpose ("use `bun bd test`"); every other
+subcommand (`pm pack`, `install`, `build`, `run`) works directly. Directory args to
+`bun-debug test` also trip a filter guard — pass explicit file paths.
+
+## Surfaces, by what you touched
+
+| Changed | Drive it with |
+|---|---|
+| `src/uws_sys/**`, `src/runtime/server/**` | `Bun.serve({port:0})` + real `fetch()`; `routes:` for static routes |
+| WebSocket / `Response::upgrade` | `Bun.serve` + `new WebSocket(...)`, echo a `Uint8Array` |
+| TLS / `SSL_CTX` | `Bun.serve({tls:{cert,key}})` + `fetch(https, {tls:{rejectUnauthorized:false}})`. Make a cert with `openssl req -x509 -newkey rsa:2048 -nodes -subj /CN=localhost -addext subjectAltName=DNS:localhost` |
+| `ConnectingSocket` (connect-failure path) | `Bun.connect()` to a port you opened then closed → `connectError` fires |
+| `src/runtime/bake/**` (dev server) | run `bun-debug index.html --port 0`, read the URL off stdout, then open `ws://host:port/_bun/hmr` |
+| `libdeflate`, `zstd`, `node:zlib` | `Bun.gzipSync`/`gunzipSync`, `Bun.zstdCompressSync`, `zlib.brotliCompress`. Feed garbage in too — it must throw, not crash |
+| `libarchive` | write side = `bun-debug pm pack`; read side = `bun-debug install ./x.tgz --no-save`, then check the extracted file exists |
+| `src/jsc/CachedBytecode.rs` | `bun-debug build x.js --bytecode --target=bun --outdir=out` then run `out/x.js` |
+| `src/tcc_sys/**` | `import { cc } from "bun:ffi"` and call a compiled C symbol |
+| Yarr `RegularExpression` | `.npmrc` with `public-hoist-pattern[]=*x*`, then `bun-debug install --dry-run` |
+| `TextCodec` | `TextDecoder`, including `{stream:true}` across a split multi-byte codepoint |
+| `JSUint8Array` | `crypto.getRandomValues(new Uint8Array(n))` (DOMJIT fast path); `ws.send(bytes)` |
+| `SourceProvider` | `new Error().stack` must contain `file:line` |
+| `Strong` / `Weak` | `WeakRef` + `Bun.gc(true)`; churn thousands of promises |
+
+## Gotchas that cost real time
+
+- **A debug assert you add is only real if it's in the binary**: `strings build/debug/bun-debug | rg '<your panic message>'`.
+- **`cargo check` is not an oracle.** It never monomorphizes, so it never evaluates
+  `const { assert!(...) }` inside a generic fn (`bun_opaque::opaque_deref*`). Finish with
+  `cargo build -p bun_bin` or `bun bd`.
+- **Generated code is built by ninja, not cargo.** `build/debug/codegen/*.rs` goes stale under
+  a bare `cargo check`. Regenerate a single file with e.g.
+  `bun src/codegen/generate-host-exports.ts build/debug/codegen`, or just run `bun bd`.
+- **Multi-file test runs share one process.** RSS/GC assertions (`gcUntilCountAtMost`,
+  "does not leak memory") and tests that mutate process globals (`buffer.kMaxLength`) fail
+  when run alongside other files even with `--isolate`. Re-run the file alone before believing it.
+- **Compare against a baseline binary, not intuition.** `~/code/bun-3` tracks `main` and usually
+  has a built `build/debug/bun-debug`. Run the same file with it to tell a regression from a
+  pre-existing flake.

src/ast/e.rs

@@ -2662,9 +2662,8 @@ mod json_tape_tests {
             self.0
         }
         /// `Parser::tape_mut` — a fresh reborrow of the root pointer per call.
-        #[allow(clippy::mut_from_ref)]
-        fn get(&self) -> &mut JsonTape {
-            // SAFETY: sole owner; each call hands out one short-lived borrow.
+        fn get(&mut self) -> &mut JsonTape {
+            // SAFETY: sole owner; `&mut self` makes the reborrow exclusive.
             unsafe { &mut *self.0.as_ptr() }
         }
     }
@@ -2682,7 +2681,7 @@ mod json_tape_tests {
     /// the inner node must survive, because `properties()` is read afterwards.
     #[test]
     fn object_json_survives_later_tape_writes() {
-        let tape = TapeOwner::new();
+        let mut tape = TapeOwner::new();
 
         // Inner `{"b": null}`.
         let kb = tape.get().alloc_str(b"b");
@@ -2707,7 +2706,7 @@ mod json_tape_tests {
 
     #[test]
     fn array_json_survives_later_tape_writes() {
-        let tape = TapeOwner::new();
+        let mut tape = TapeOwner::new();
 
         let (first, count) = tape.get().append_items(&[JsonValue::Null], &[]);
         // SAFETY: the tape's own pointer, as `Parser` passes it.
@@ -2741,7 +2740,7 @@ mod json_tape_tests {
     /// later strings spill into new chunks.
     #[test]
     fn alloc_str_chunks_never_move() {
-        let tape = TapeOwner::new();
+        let mut tape = TapeOwner::new();
         let a = tape.get().alloc_str(b"first");
         // Force a fresh chunk: bigger than what is left in the current one.
         let big = vec![b'x'; JsonTape::STR_CHUNK + 1];

src/boringssl/lib.rs

@@ -99,7 +99,7 @@ type SslCustomVerifyCb =
 
 unsafe extern "C" {
     fn SSL_CTX_set_custom_verify(
-        ctx: *mut boring::SSL_CTX,
+        ctx: *mut boring::sys::SSL_CTX,
         mode: c_int,
         callback: SslCustomVerifyCb,
     );
@@ -114,7 +114,7 @@ unsafe extern "C" fn noop_custom_verify(
 
 /// `Send + Sync` newtype around the process-lifetime client `SSL_CTX*` so it
 /// can sit inside a `OnceLock` (raw pointers opt out of `Send`/`Sync`).
-struct CtxStore(ptr::NonNull<boring::SSL_CTX>);
+struct CtxStore(ptr::NonNull<boring::sys::SSL_CTX>);
 // SAFETY: `SSL_CTX` is internally thread-safe per BoringSSL docs (its refcount
 // and method tables are guarded by `CRYPTO_MUTEX`); we only ever bump the
 // refcount and hand it to `SSL_new`, both of which BoringSSL documents as
@@ -138,11 +138,12 @@ std::thread_local! {
 ///
 /// # Safety
 /// `ctx` must be a live `SSL_CTX*`.
-pub unsafe fn ssl_ctx_setup(ctx: *mut boring::SSL_CTX) {
+pub unsafe fn ssl_ctx_setup(ctx: *mut boring::sys::SSL_CTX) {
+    let ctx = boring::sys::SSL_CTX::opaque_ref(ctx);
     AUTO_CRYPTO_BUFFER_POOL.with(|pool| {
-        // SAFETY: caller guarantees `ctx` is a live `SSL_CTX*`; the pool pointer
-        // is either freshly returned by `CRYPTO_BUFFER_POOL_new` or a previously
-        // stored thread-local pool, and `SSL_DEFAULT_CIPHER_LIST` is a valid C string.
+        // SAFETY: the pool pointer is either freshly returned by
+        // `CRYPTO_BUFFER_POOL_new` or a previously stored thread-local pool, and
+        // `SSL_DEFAULT_CIPHER_LIST` is a valid C string.
         unsafe {
             if pool.get().is_null() {
                 pool.set(CRYPTO_BUFFER_POOL_new());
@@ -159,23 +160,25 @@ pub fn init_client() -> *mut boring::SSL {
         // Bump the refcount on every call after the first; the first call's
         // `SSL_CTX_new` already returns refcount = 1.
         if let Some(stored) = CTX_STORE.get() {
-            let _ = boring::SSL_CTX_up_ref(stored.0.as_ptr());
+            let _ = boring::SSL_CTX_up_ref(boring::sys::SSL_CTX::opaque_ref(stored.0.as_ptr()));
         }
         let ctx = CTX_STORE
             .get_or_init(|| {
                 // Three steps:
                 //   1. SSL_CTX_new(TLS_with_buffers_method())
                 //   2. setCustomVerify(noop_custom_verify) → SSL_CTX_set_custom_verify(ctx, 0, cb)
                 //   3. setup() → CRYPTO_BUFFER_POOL_new + set0_buffer_pool + set_cipher_list("ALL")
-                let ctx = boring::SSL_CTX_new(boring::TLS_with_buffers_method());
-                SSL_CTX_set_custom_verify(ctx, 0, Some(noop_custom_verify));
-                ssl_ctx_setup(ctx);
-                CtxStore(ptr::NonNull::new(ctx).expect("SSL_CTX_new"))
+                let ctx =
+                    boring::SSL_CTX::new(boring::TLS_with_buffers_method()).expect("SSL_CTX_new");
+                SSL_CTX_set_custom_verify(ctx.as_ptr(), 0, Some(noop_custom_verify));
+                ssl_ctx_setup(ctx.as_ptr());
+                // Process-lifetime: this +1 is never given back.
+                CtxStore(ctx.leak())
             })
             .0
             .as_ptr();
 
-        let ssl = boring::SSL_new(ctx);
+        let ssl = boring::SSL_new(boring::sys::SSL_CTX::opaque_ref(ctx));
         boring::SSL_set_connect_state(ssl);
 
         ssl
@@ -323,7 +326,7 @@ fn match_dns_name(pattern: &[u8], hostname: &[u8]) -> bool {
     strings::eql_case_insensitive_ascii(pattern, hostname, true)
 }
 
-pub fn check_x509_server_identity(x509: &mut boring::X509, hostname: &[u8]) -> bool {
+pub fn check_x509_server_identity(x509: &mut boring::sys::X509, hostname: &[u8]) -> bool {
     let host_is_ip = strings::is_ip_address(hostname);
     // Node.js: CN is consulted only when the certificate carries no
     // DNS / IP / URI subjectAltName entries. Track whether any were seen.
@@ -333,7 +336,7 @@ pub fn check_x509_server_identity(x509: &mut boring::X509, hostname: &[u8]) -> b
     // SAFETY: x509 is a valid &mut so non-null/aligned; all boring:: fns are
     // null-safe where documented.
     unsafe {
-        let x509: *mut boring::X509 = x509;
+        let x509: *mut boring::sys::X509 = x509;
         let index = boring::X509_get_ext_by_NID(x509, boring::NID_subject_alt_name, -1);
         if index >= 0 {
             // we can check hostname
@@ -353,7 +356,9 @@ pub fn check_x509_server_identity(x509: &mut boring::X509, hostname: &[u8]) -> b
                     None
                 };
 
-                if let Some(names) = boring::GeneralNames::from_raw(boring::X509V3_EXT_d2i(ext)) {
+                if let Some(names) =
+                    boring::struct_stack_st_GENERAL_NAME::from_raw(boring::X509V3_EXT_d2i(ext))
+                {
                     for name in names.iter() {
                         match name.name_type {
                             boring::GEN_URI => {