Announcing Swift 5.4.3 for Linux and Windows

We are happy to announce the release of Swift 5.4.3 for Linux and Windows.

New downloads are available on

Release Notes


  • disable some assertions to quickly workaround 'try?' bug [#38964]


  • Make constants immortal [#3065]
  • Implement copy() in ISO8601DateFormatter [#3061]
  • Fix BlockOperation with multiple execution blocks [#3053]
  • Fix memory leak in PropertyListSerialization [#3018]
  • Partially fix Decimal.ulp to return a valid representation [#3015]
  • Implement copy() in DateFormatter [#3011]
  • Fix temporary filename coda going above the maximum path length in some cases [#3006]
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