Windows GitHub Action runners failing with `could not build module 'ucrt'`

Bắt đầu với lần chạy GitHub Actions được liên kết và các định nghĩa workflow Windows trong swiftlang/github-workflows. Tái hiện các lỗi mô-đun ucrt và _visualc_intrinsics trên các phiên bản Swift được liệt kê, đồng thời so sánh chúng với workaround Docker. Được xem là hoàn tất khi các actions Windows chạy thành công mà không yêu cầu Docker, bao gồm cả các repository không thể kiểm thử bên trong container.

The Windows GitHub actions on swift-format are failing with the following error (on 6.0, nightly, nightly-6.1). I think GitHub recently updated their Windows runners. Eg. https://github.com/swiftlang/swift-format/actions/runs/13572154457/job/38021583870

C:\Users\runneradmin\AppData\Local\Programs\Swift\Platforms\6.0.2\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift\shims/LibcOverlayShims.h:27:10: note: while building module 'ucrt' imported from C:\Users\runneradmin\AppData\Local\Programs\Swift\Platforms\6.0.2\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift\shims/LibcOverlayShims.h:27:
 25 | #endif
 26 | #if defined(_WIN32) && !defined(__CYGWIN__)
 27 | #include <errno.h>
    |          `- note: while building module 'ucrt' imported from C:\Users\runneradmin\AppData\Local\Programs\Swift\Platforms\6.0.2\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift\shims/LibcOverlayShims.h:27:
 28 | #include <io.h>
 30 | #if defined(__clang__) && (defined(_M_ARM64) || defined(_M_ARM64EC))
 31 | #include <arm_neon.h>
C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.43.34808\include\intrin.h:35:18: error: could not build module '_visualc_intrinsics'
  33 | 
  34 |     #if (defined (_M_IX86) || defined (_M_X64) || (defined(_M_ARM64) && defined(USE_SOFT_INTRINSICS))) && !defined(_CHPE_ONLY_) && (!defined(_M_ARM64EC) || !defined(_DISABLE_SOFTINTRIN_))
  35 |         #include <immintrin.h>
     |                  `- error: could not build module '_visualc_intrinsics'
  36 |         #include <ammintrin.h>
  37 |     #endif
<module-includes>:1:10: note: in file included from <module-includes>:1:
1 | #include "LibcOverlayShims.h"
  |          `- note: in file included from <module-includes>:1:
2 | 
<unknown>:0: error: could not build C module 'SwiftOverlayShims'
C:\Users\runneradmin\AppData\Local\Programs\Swift\Platforms\6.0.2\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift\shims/LibcOverlayShims.h:27:10: error: could not build module 'ucrt'
 25 | #endif
 26 | #if defined(_WIN32) && !defined(__CYGWIN__)
 27 | #include <errno.h>
    |          `- error: could not build module 'ucrt'
 28 | #include <io.h>
 29 | typedef int mode_t;

I was able to work around this by running tests inside Docker container on Windows again but that adds 5-10 minutes to CI time and eg. the VS Code extension repo can’t run their tests inside a Docker container.