Issues

• Wrong behavior of using and await using in for-of heads

  C-bug
  swc-project/swc#12494 · Filter by author TrickyPi opened on Oct 8, 2026

• Compress/minifier: switches incorrectly removes switch case containing closure over initializer binding

  C-bug
  swc-project/swc#12492 · Filter by author ja2nicholl opened on Oct 7, 2026
  1

• Reset expression errors when object literal is a member base

  swc-project/swc#12486 · Filter by author JLHwung opened on Oct 5, 2026

• @swc/core fails to load on wasm32 runtimes: @swc/core-wasm32-wasi is referenced by the loader but never published

  enhancement
  swc-project/swc#12466 · Filter by author michaelkremenetsky opened on Oct 2, 2026

• Source maps do not account for U+2028 and U+2029 line terminators

  C-bug
  swc-project/swc#12454 · Filter by author gb-jos opened on Oct 1, 2026
  2

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

  C-bug
  swc-project/swc#12438 · Filter by author bminer opened on Sep 29, 2026

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

  swc-project/swc#12429 · Filter by author 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

  swc-project/swc#12427 · Filter by author Oofles opened on Sep 28, 2026

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

  swc-project/swc#12404 · Filter by author baltasarblanco opened on Sep 23, 2026

• compress.inline changes memory semantics for closures

  C-bug
  swc-project/swc#12344 · Filter by author lukebrody opened on Sep 11, 2026

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

  C-bugLabor0
  Bug

  swc-project/swc#12314 · Filter by author kdy1 opened on Sep 9, 2026
  

• es/minifier: property mangling leaves literal property references unchanged

  C-bugLabor0
  Bug

  swc-project/swc#12312 · Filter by author kdy1 opened on Sep 9, 2026
  

• es/minifier: unused class elimination removes superclass validation

  C-bugLabor0
  Bug

  swc-project/swc#12310 · Filter by author kdy1 opened on Sep 9, 2026
  

• es/minifier: class effect extraction loses implicit strict mode

  C-bugLabor0
  Bug

  swc-project/swc#12309 · Filter by author kdy1 opened on Sep 9, 2026
  

• es/minifier: static method aliasing detaches receiver-dependent Promise methods

  C-bugLabor0
  Bug

  swc-project/swc#12308 · Filter by author kdy1 opened on Sep 9, 2026
  

• es/minifier: self-assignment removal ignores immutable binding writes

  C-bugLabor0
  Bug

  swc-project/swc#12302 · Filter by author kdy1 opened on Sep 9, 2026
  

• es/minifier: prototype key lookup treats unknown computed properties as absent

  C-bugLabor0
  Bug

  swc-project/swc#12297 · Filter by author kdy1 opened on Sep 9, 2026
  

• es/minifier: method-to-arrow conversion ignores direct eval in the body

  C-bugLabor0
  Bug

  swc-project/swc#12295 · Filter by author kdy1 opened on Sep 9, 2026
  

• bindings: ship self-loading compressed native npm addons

  Labor0
  Feature

  swc-project/swc#12273 · Filter by author kdy1 opened on Sep 6, 2026
  

• es/minifier: conditional call merging moves common argument effects before the test

  C-bug
  Bug

  swc-project/swc#12225 · Filter by author kdy1 opened on Sep 5, 2026
  

• es/minifier: IIFE inlining moves new.target across its function boundary

  C-bug
  Bug

  swc-project/swc#12220 · Filter by author kdy1 opened on Sep 5, 2026
  

• es/minifier: null-or-undefined comparison folding drops effects in typed operands

  C-bug
  Bug

  swc-project/swc#12217 · Filter by author kdy1 opened on Sep 5, 2026
  

• es/minifier: conditional constructor folding evaluates the callee before its condition

  C-bug
  Bug

  swc-project/swc#12216 · Filter by author kdy1 opened on Sep 5, 2026
  

• es/minifier: removing an unused rest parameter creates mapped arguments

  C-bug
  Bug

  swc-project/swc#12211 · Filter by author kdy1 opened on Sep 5, 2026
  

• es/minifier: arguments replacement rewrites delete and update operands

  C-bug
  Bug

  swc-project/swc#12210 · Filter by author kdy1 opened on Sep 5, 2026