`llvm-cov` [rust] Coverage Source code not covered when rust code is across multiple lines

[Ryang20718]

I tried this code:

    log::info!(
        "hello world {} 12323123123123123123123123123123123123123123123123",
        "Testing"
    );

I expected all lines to be covered. However, only the first line is covered

log::info!(

All other lines are not covered

Version

LLVM (http://llvm.org/):
  LLVM version 19.1.7-rust-1.86.0-stable
  Optimized build.

might be related?

#82259
#54579

[EugeneZelenko]

Could you please try 20 or main branch?

[Ryang20718]

@EugeneZelenko I made a minimal repro which still has the issue on llvm 20 https://github.com/Ryang20718/llvm-rust-repro/blob/main/README.md

Instructions are on readme