Rust Coverage not working if macros are formatted 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

log::info!(

All other lines are not covered

rustc --version --verbose:

rustc 1.86.0 (05f9846f8 2025-03-31)
binary: rustc
commit-hash: 05f9846f893b09a1be1fc8560e33fc3c815cfecb
commit-date: 2025-03-31
host: x86_64-unknown-linux-gnu
release: 1.86.0
LLVM version: 19.1.7

[workingjubilee]

could you give instructions to reproduce the issue?

[Ryang20718]

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

[Ryang20718]

root cause is probably llvm related llvm/llvm-project#143541 (comment)

[workingjubilee]

that repo isn't publicly viewable

[Ryang20718]

apologies @workingjubilee made the repo public

[RenjiSann]

I guess this has to do with the fact that info is a macro.

I wonder if you meant "Rust Coverage not working if lines macros are formatted across multiple lines" in the title ?