Compilation errors not shown in output

Version: 1.0.79
OS: Windows 11 x64 with MSVC (with french language module)

This build script: https://github.com/ennis/openimageio-rs/blob/master/openimageio-sys/build.rs
produces the following output:

The following warnings were emitted during compilation:
warning: cl�: Ligne de commande warning D9002�: option '-std=c++17' inconnue ignor�e
warning: cl�: Ligne de commande warning D9002�: option '-std=c++17' inconnue ignor�e
warning: cl�: Ligne de commande warning D9002�: option '-std=c++17' inconnue ignor�e
warning: cl�: Ligne de commande warning D9002�: option '-std=c++17' inconnue ignor�e
warning: cl�: Ligne de commande warning D9002�: option '-std=c++17' inconnue ignor�e
error: failed to run custom build command for `openimageio-sys v0.1.0 (C:\Users\Alexandre\devel\openimageio-rs\openimageio-sys)`
note: To improve backtraces for build dependencies, set the CARGO_PROFILE_TEST_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
Caused by:
  process didn't exit successfully: `C:\Users\Alexandre\devel\openimageio-rs\target\debug\build\openimageio-sys-62699496145a9d69\build-script-build` (exit code: 1)
  --- stderr
  trying to detect/fetch OpenImageIO via vcpkg...
  found OpenImageIO through vcpkg
  -> libs: ["C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\OpenImageIO.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\OpenImageIO_Util.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\zlib.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\tiff.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\lzma.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\jpeg.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\turbojpeg.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\Iex-3_1.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\IlmThread-3_1.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\OpenEXR-3_1.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\OpenEXRCore-3_1.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\OpenEXRUtil-3_1.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\Imath-3_1.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\libpng16.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\fmt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_thread-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_system-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_regex-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_container-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_exception-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_date_time-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_chrono-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_atomic-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_stacktrace_noop-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_stacktrace_windbg-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_stacktrace_windbg_cached-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_random-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_filesystem-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_coroutine-vc140-mt.lib", "C:\\vcpkg\\installed\\x64-windows-static-md\\lib\\boost_context-vc140-mt.lib"]
  -> link paths: ["C:\\vcpkg\\installed\\x64-windows-static-md\\lib"]
  -> include paths: ["C:\\vcpkg\\installed\\x64-windows-static-md\\include"]
  -> DLLs: []
  -> DLL paths: []
  clang version 15.0.4
  Target: x86_64-pc-windows-msvc
  Thread model: posix
  InstalledDir: 
  ignoring nonexistent directory "lib\clang\15.0.4\include"
  #include "..." search starts here:
  #include <...> search starts here:
   C:\vcpkg\installed\x64-windows-static-md\include
   C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.32.31326\include
   C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.32.31326\atlmfc\include
   C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\ucrt
   C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\shared
   C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\um
   C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\winrt
   C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\cppwinrt
  End of search list.
  error occurred: Command "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.32.31326\\bin\\HostX64\\x64\\cl.exe" "-nologo" "-MD" "-Z7" "-Brepro" "-I" "src/glue" "-I" "C:\\vcpkg\\installed\\x64-windows-static-md\\include" "-W4" "-std=c++17" "-DOIIO_STATIC_DEFINE" "-FoC:\\Users\\Alexandre\\devel\\openimageio-rs\\target\\debug\\build\\openimageio-sys-fdd0f34cca1069aa\\out\\src/glue/imagecache.o" "-c" "src/glue/imagecache.cpp" with args "cl.exe" did not execute successfully (status code exit code: 2).
Process finished with exit code 101

If I compile the file separately I can see the compilation errors:

src/glue/imagecache.cpp(9): error C2027: utilisation du type non défini 'OpenImageIO_v2_4::ImageCache'
C:\vcpkg\installed\x64-windows-static-md\include\OpenImageIO/imagebuf.h(27): note: voir la déclaration de 'OpenImageIO_v2_4::ImageCache'
src/glue/imagecache.cpp(9): error C3861: 'create' : identificateur introuvable
src/glue/imagecache.cpp(13): error C2027: utilisation du type non défini 'OpenImageIO_v2_4::ImageCache'
C:\vcpkg\installed\x64-windows-static-md\include\OpenImageIO/imagebuf.h(27): note: voir la déclaration de 'OpenImageIO_v2_4::ImageCache'
src/glue/imagecache.cpp(13): error C3861: 'destroy' : identificateur introuvable
src/glue/imagecache.cpp(17): error C2027: utilisation du type non défini 'OpenImageIO_v2_4::ImageCache'
...

Curiously the script still prints the warnings for the invalid command line parameters (warning: cl�: Ligne de commande warning D9002�: option '-std=c++17' inconnue ignor�e), but compilation warning and errors are not reported.

It works fine (it reports the errors) if I install the VS english language pack and set that as the default language, so I suppose this is a problem related to non-UTF8 output being silently dropped somehow.

Start by inspecting the cc-rs compiler-output handling around the build script invocation, then reproduce the failure with the referenced openimageio-sys build.rs and MSVC using the French language pack. Compare the output with the separately compiled src/glue/imagecache.cpp errors; done means compilation diagnostics are reported instead of being silently dropped.