Rain

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Thanks for the report! This looks like an internal invariant in hakari was violated, most likely due to some edge case in the repo. Will look over the next week,...

The error is: ``` The application panicked (crashed). Message: full value should be present Location: tools/hakari/src/hakari.rs:680 ``` which corresponds to https://github.com/facebookincubator/cargo-guppy/blob/be758911ff3f05f3853560fd8b3dd783e708c8b2/tools/hakari/src/hakari.rs#L680.

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Tagging this as "help wanted" -- I don't really use or target Windows for development so it would be good to have experienced Windows developers fix up any remaining issues.

We can probably address this by switching out `cargo-compare` to use the new `cargo tree` support for printing out resolved features.

@gibfahn for [cargo-nextest](https://nexte.st/) I [tried that approach](https://github.com/nextest-rs/nextest/pull/312) but encountered https://github.com/clap-rs/clap/issues/3869 unfortunately.

For multi-line expressions, it probably also makes sense to have a way to specify an end-of-line span.

> Generally, with ptrace coverage tools like kcov or tarpaulin you need the binary to get coverage for before starting coverage collection to read the debug info, so building tests...

Ah, good point. Could the TrustedLen contract be followed (or is it already followed)? https://doc.rust-lang.org/stable/std/iter/trait.TrustedLen.html