All issues

Please read this if you think transpilation is wrong
#7435 · kdy1 opened on May 23, 2023
6
[Meta] Performance issues
#11228 · kdy1 opened on Nov 4, 2025

@swc/core 1.16: native addon cache validation rejects ordinary Windows directories, so require('@swc/core') throws

#12442

· Sovers Tonmoy Pandey (s0vers) opened

on Sep 29, 2026

es/minifier: shadowed `undefined` parameter renamed to `undefined1`, leaving an undeclared reference

#12438

· Blake Miner (bminer) opened

on Sep 29, 2026

config: `BoolOr<T>` hides the real deserialization error behind "expected boolean or object" (e.g. unknown `reactCompiler` fields)

#12435

· Philippe (PhilMeyr) opened

on Sep 29, 2026

for...of transformation mess up repeated JS labels

#12433

· Xinkai Chen (Xinkai) opened

on Sep 28, 2026

for await...of loops transformation lost JS labels

#12430

· Xinkai Chen (Xinkai) opened

on Sep 28, 2026

Legacy decorators: the generated `_ts_decorate(...)` calls have no source map mappings

#12429

· L A Romeo (l7aromeo) opened

on Sep 28, 2026

Private method call in an update expression (`this.#m().n++`) compiles to field helper → `privateMap.get is not a function`

#12427

· Brandon DeVault (Oofles) opened

on Sep 28, 2026

reactCompiler: stack overflow on long call chains; fast_check::is_required unused by transform

#12423

· Petr Glaser (BleedingDev) opened

on Sep 27, 2026

Minifier emits `if (…) async function` for #8953 input again

#12404

· Baltasar Blanco (baltasarblanco) opened

on Sep 23, 2026

`env` (preset-env style) targets don't lower `for await` inside a plain `async function`, unlike `jsc.target`

#12399

· Jerome Louis (jlowcs) opened

on Sep 21, 2026

`compress.inline` changes memory semantics for closures

#12344

· Luke Brody (lukebrody) opened

on Sep 11, 2026

es/minifier: toplevel false fails to preserve global var inside a block

#12314

· Donny/강동윤 (kdy1) opened

on Sep 9, 2026