SQL internals shed dead code and core plumbing is centralized (
a0e221e, 5d8b292)
Bun removed a chunk of unused sql_jsc helpers and refactored the JS SQL adapters around a shared BasePooledConnection hierarchy. This trims duplication across Postgres/MySQL/SQLite and changes the internal SQL implementation shape without altering the public surface.
Standalone browser builds now emit sourcemaps correctly (
6128f8e)
bun build --compile --target=browser --sourcemap=linked now writes sourcemaps for standalone HTML builds instead of silently dropping them. The fix also updates output-file handling so linked maps point at the right relative location for HTML entrypoints.
Fetch aborts now settle buffered body promises (bcad9b2)
Aborting a request with an in-flight streaming request body could leave arrayBuffer()/text() hanging forever on the response side. The tasklet now ensures the buffered response settles before canceling the request-body sink, closing a deadlock-like promise leak.
Windows fs.lchown now works like Node (541ea3a)
fs.lchown, fs.lchownSync, and the promise API now succeed on Windows instead of throwing a TODO error. This brings Bun in line with Node’s no-op success behavior for ownership changes on Windows.
Dev-server HMR keeps importer tracking when modules flip formats (fc79577)
When a module hot-updated from ESM to CJS, its replacement require binding was attached with the wrong this, breaking importer bookkeeping. The fix preserves dependency edges so updates continue to propagate instead of falling back to full reloads.
macOS spawn file-action errors are surfaced instead of being ignored (6b001fe)
posix_spawn on macOS now returns real errno values from file-action setup instead of collapsing them into generic failures. That fixes cases like too many open fds, where Bun could previously spawn a child with broken stdio and lose output.
Bun build no longer panics on lazy-export modules (885c44f)
internal_bake_dev now handles lazy-export modules by forcing the CJS print path during bundling, avoiding printer crashes for JSON/TOML/CSS-style lazy exports. The printer and linker both now agree on the generated module shape.
SQL test fixtures no longer leave orphaned subprocesses (80d92d4)
Tests that time out while using spawned SQL fixtures now clean up more reliably, preventing runaway orphan processes from sticking around after failures. This is a test-harness safety fix aimed at avoiding machine-wide load spikes during SQL regressions.
Bun.plugin target coercion now checks for exceptions (fd99f8b)
A debug assertion could fire when Bun.plugin coerced a non-string target and user code threw during Symbol.toPrimitive. The fix restores proper exception handling so the API throws normally instead of aborting in debug builds.
Other misc changes
- CI: bumped Darwin test timeout from 40 to 45 minutes (ac312f0)
- Test harness: added
BUN_TEST_SERVICE_<name>service overrides and docker-start tracking (f2821a2) - SQL tests updated for shared pool/connection refactor and fixture lifetime fixes (5d8b292, 80d92d4)
- Additional bundler/dev-server test coverage for sourcemaps and lazy exports (6128f8e, 885c44f)
- Added fetch abort regression tests and fs lchown coverage (bcad9b2, 541ea3a)
- Minor internal SQL dead-code cleanup across
sql_jsc(a0e221e)