A used function should have had coverage mapping data but did not

[Zalathar]

The immediate symptoms of #118643 were fixed by #118666, but some users reported that their builds now encounter another coverage-related ICE:

#118643 (comment)
#118643 (comment)

error: internal compiler error: compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs:98:17: A used function should have had coverage mapping data but did not: _RNvMsl_NtNtNtCsl0gwtrD5SWs_5winit13platform_impl8platform15window_delegateNtB5_19WinitWindowDelegate21window_did_resign_key

[Zalathar]

@rustbot label +T-compiler +A-code-coverage

[Zalathar]

This ICE does not occur on current stable/beta, but does occur on nightly.

@rustbot label +regression-from-stable-to-nightly

[Zalathar]

(This will be fixed by #118852, which is awaiting review.)

[apiraino]

WG-prioritization assigning priority (Zulip discussion).

@rustbot label -I-prioritize +P-high