trybuild coverage miss

[wcampbell0x2a]

I see that trybuild should generate a coverage hit, but I'm having trouble getting them to hit in this MR.

(The repo (for now) uses tarpaulin, but I might move to this crate)

Expect

I expected the following to have a hit: https://github.com/sharksforarms/deku/pull/352/files#diff-ccee6a304f8d0cb296ba83159aecd8534be0715ac4c0a3d0f1efb57e216ef490L191-L197. This should have been hit from the trybuild test @ tests/test_compile/cases/ctx_validation.stderr

$ TRYBUILD=overwrite cargo +nightly llvm-cov --workspace --doctests --release --html --ignore-filename-regex attributes

[taiki-e]

Thanks for the report!

This appears to be due to a change in the target directory in trybuild 1.0.76 (dtolnay/trybuild#219).
I can confirm that pinning the trybuild to 1.0.75 or older and running cargo clean and then cargo-llvm-cov solves the problem.

As for the change in trybuild 1.0.76, I thought I had addressed it in #238, but that patch didn't seem to work correctly.

[taiki-e]

This is because I had missed the fact that the directory where the test workspace was generated had also been updated.

https://github.com/dtolnay/trybuild/pull/219/files#diff-1d06da761111802c793c6e5ca704bfa0d6336d0becf87fddff02d81548a838abL150

This will be fixed in #301.

[taiki-e]

Fixed in 0.5.26.

[wcampbell0x2a]

Thanks!