CompressionStream now stays alive across async transforms (
392726b)
Bun now keeps the native compression coder alive while off-thread brotli/zstd work is still in flight, fixing a use-after-free during VM teardown. This matters because large chunks can hand codec work to the WorkPool; the new refcounted ownership prevents the pool thread from touching freed native state.
Long data: imports no longer hit ENAMETOOLONG (f8b6342)
The module loader no longer treats oversized data: URLs like filesystem paths, so very long inline module imports resolve correctly instead of failing at platform path limits. That restores parity with Node for large generated modules and avoids a surprising size ceiling.
bun test --parallel now aborts on fatal Windows worker crashes (11e3f2b)
Parallel test runs now distinguish fatal NTSTATUS-style crashes from ordinary flaky exits on Windows and stop the whole run when a worker dies that way. This prevents serious engine/addon crashes from being misclassified as transient file failures and hidden by retries.
V8 addon callbacks keep returned values alive across scope pops (f493239)
The V8 shim now preserves callback return values even when nested handle scopes close inside the callback, fixing a deterministic crash with the common nan pattern. This is a compatibility fix for native addons that expect V8's handle-scope lifetime rules.
macOS half-open sockets stop spinning forever on peer reset (
8c5bf69)
The usockets kqueue path now correctly treats FIN/RST edge cases and stops the 100% CPU spin seen on half-open sockets behind pending writes. That closes a nasty liveness bug for keep-alive and tunnel sockets that could previously deadlock idle processes.
Node process compatibility gets a large semantics pass (
45eda51)
Bun picked up a broad node:process compatibility batch covering env-object behavior, warnings/flags, exit semantics, and other gaps surfaced by the Node v26.3.0 test suite. This is a substantial runtime parity update with direct user-visible behavior changes.
HTMLRewriter no longer use-after-frees abandoned transforms (45ee955)
A GC-sweep race in the HTMLRewriter streaming path was fixed so abandoned transforms can't be freed while a sink/controller still expects them. This removes an ASAN-detected use-after-free in a newly added streaming code path.
Bun.serve().stop() now closes idle connections, and closeIdleConnections() is exposed (eba6c07)
Server shutdown semantics changed: idle keep-alive connections are closed immediately, in-flight requests drain before the stop promise resolves, and a new closeIdleConnections() API is available. This improves graceful shutdown behavior and makes the HTTP server match documented expectations more closely.
Windows named-pipe listeners now release correctly on unref() (9b7c272)
server.unref() now actually lets Windows named-pipe servers stop keeping the process alive. That fixes a platform-specific hang where a listener would remain resident even though it had been unreferenced.
Other misc changes
- React Compiler client-mode bundling fix for full-stack browser graphs (e3f9e3b)
- Dev error page switched to JSON payloads, restoring stack traces and richer diagnostics (
6d090a2) - Mimalloc build define removal and related build cleanup (c6f3f7d)
- THP disabling no longer leaks into spawned processes (25d9d4a)
- Bun.plugin segfault fix for throwing object-loader
exportsgetters (5a5f1b8) - Clippy/rustfmt/Miri/tsconfig and compatibility-test maintenance (898b169, 43caaf3)
- Minor usockets and HTTP cleanup around half-close/shutdown behavior (8c5bf69, eba6c07)