x86_64-pc-windows-msvc build failing: expected `src/lib.rs` to start with:

building 2ced82cdd61e163b9b07e33686c1ed78de2b01af failed:

error: failed to run custom build command for `rustc_apfloat v0.2.0+llvm-462a31f5a5ab (G:\projs\rustc_apfloat)`

Caused by:
  process didn't exit successfully: `G:\projs\rustc_apfloat\target\debug\build\rustc_apfloat-cd007fccae510ac7\build-scri
pt-build` (exit code: 101)
  --- stdout
  cargo:rerun-if-changed=build.rs

  --- stderr

  expected `src/lib.rs` to start with:

  //! Port of LLVM's APFloat software floating-point implementation from the
  //! following C++ sources (please update commit hash when backporting):
  //! https://github.com/llvm/llvm-project/commit/

  thread 'main' panicked at 'failed to validate `src/lib.rs`'s commit hash (see above)', build.rs:32:13
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Probably line ending mismatch?

Reproduce: clone master branch, build with cargo build on x86_64-pc-windows-msvc.

Start with build.rs around the validation reported at line 32 and compare it with the opening of src/lib.rs. Reproduce with cargo build on x86_64-pc-windows-msvc, checking the reported line-ending or header mismatch; done means the Windows build passes the existing source-header validation.