(Question) When this will use stable Rust?

[hardBSDk]

No description provided.

[dnbln]

Hello! Currently, cargo-difftests depends on the llvm-tools-preview rustup component to be able to make sense of the LLVM coverage outputs; llvm-tools-preview is only available on nightly. (see rust-lang/rust#85658, https://internals.rust-lang.org/t/llvm-tools-a-new-rustup-component-for-binary-inspection-objdump-nm-size-and-profiling-profdata/7830/3); as such, it will need nightly until the llvm-tools-preview component is stabilized.

I've pushed commit 9f16064, which allows you to build the cargo-difftests library with the stable toolchain, but it still depends on nightly because of its use of llvm-tools-preview internally (although if you do not need to interact with the LLVM coverage output, you could use it with the stable toolchain without a problem).