GC now frees leaked heap members on collected JS objects (
c9958cd)
ImportMetaObject, v8 InternalFieldObject, and JSHTTPParser now provide destructors so their owned native memory is released when GC collects them. This closes a real leak path for import.meta.url records and similar heap-owned fields.
Stream cloning preserves native body metadata and avoids unnecessary tees (b5ba14b)
Response.clone() now keeps unread native blob/file bodies on the fast path instead of always teeing through JS, which preserves MIME type and sendfile-backed behavior. It also avoids breaking cached body streams after clone by syncing wrapper caches correctly.
Direct streams got full JS backpressure/cancel semantics (3cb2fa7)
JS-read direct streams now own their buffers, propagate backpressure, and wake/cancel readers correctly instead of behaving like a loose native source. This is a substantial runtime contract change for getReader(), for await, pipeTo(), and tee().
String enum folding was made linear and non-corrupting (14a4f45)
The parser’s string-addition folder was refactored so inlined string enum members are stored in a flat, safe form before concatenation. That fixes a nasty quadratic-memory/OOM path and prevents shared rope corruption during constant folding.
req.clone() no longer leaves request-body streams hanging after response end (8afe3cb)
Bun.serve now settles and errors parked request-body streams even when the handler clones the request and never reads either body. This fixes a per-request leak that could keep tee branches, controllers, and promises alive indefinitely.
Property iteration can now include Symbol keys without misreporting them as strings (26fba3a)
The JS property iterator gained an explicit include_symbols mode, and callers that only count/display properties can opt into it. Native code no longer accidentally turns Symbols into their description strings, which affects macros, HTTP2 sensitive headers, spawn env, and similar walkers.
Postgres bytea binds now reject invalid values instead of silently writing empty bytes (667372e)
Binding a non-BufferSource to a bytea parameter now throws ERR_INVALID_ARG_TYPE with the correct parameter index. That closes a data-loss bug where arrays, dates, and plain objects were stored as \x without warning.
Other misc changes
- Fixed
Bun.write()promise resolution on macOSfcopyfilepath. - Fixed a keep-alive pool eviction bug to close sockets with FIN instead of RST.
- Fixed
FileReader/pipe-reader event-loop handling so stopped readers don’t pin the process. bun test --isolatenow fences late completions from a finished file.MIMETypenow frees its native strings on GC.- Various dead-code removals and dependency/baseline updates.
- Minor test expectation and ASan detection tweaks.