Currently `has_errors` excludes lint errors. This commit changes it to
include lint errors.
The motivation for this is that for most places it doesn't matter
whether lint errors are included or not. But there are multiple places
where they must be includes, and only one place where they must not be
included. So it makes sense for `has_errors` to do the thing that fits
the most situations, and the new `has_errors_excluding_lint_errors`
method in the one exceptional place.
The same change is made for `err_count`. Annoyingly, this requires the
introduction of `err_count_excluding_lint_errs` for one place, to
preserve existing error printing behaviour. But I still think the change
is worthwhile overall.
We have several methods indicating the presence of errors, lint errors,
and delayed bugs. I find it frustrating that it's very unclear which one
you should use in any particular spot. This commit attempts to instill a
basic principle of "use the least general one possible", because that
reflects reality in practice -- `has_errors` is the least general one
and has by far the most uses (esp. via `abort_if_errors`).
Specifics:
- Add some comments giving some usage guidelines.
- Prefer `has_errors` to comparing `err_count` to zero.
- Remove `has_errors_or_span_delayed_bugs` because it's a weird one: in
the cases where we need to count delayed bugs, we should really be
counting lint errors as well.
- Rename `is_compilation_going_to_fail` as
`has_errors_or_lint_errors_or_span_delayed_bugs`, for consistency with
`has_errors` and `has_errors_or_lint_errors`.
- Change a few other `has_errors_or_lint_errors` calls to `has_errors`,
as per the "least general" principle.
This didn't turn out to be as neat as I hoped when I started, but I
think it's still an improvement.
Currently, `emit_diagnostic` takes `&mut self`.
This commit changes it so `emit_diagnostic` takes `self` and the new
`emit_diagnostic_without_consuming` function takes `&mut self`.
I find the distinction useful. The former case is much more common, and
avoids a bunch of `mut` and `&mut` occurrences. We can also restrict the
latter with `pub(crate)` which is nice.
Currently it creates an `Option` and then does `map`/`unwrap_or` and
`map_or_else` on it, which is hard to read.
This commit simplifies things by moving more code into the two arms of
the if/else.
incr.comp.: Make sure dependencies are recorded when feeding queries during eval-always queries.
This PR makes sure we don't drop dependency edges when feeding queries during an eval-always query.
Background: During eval-always queries, no dependencies are recorded because the system knows to unconditionally re-evaluate them regardless of any actual dependencies. This works fine for these queries themselves but leads to a problem when feeding other queries: When queries are fed, we set up their dependency edges by copying the current set of dependencies of the feeding query. But because this set is empty for eval-always queries, we record no edges at all -- which has the effect that the fed query instances always look "green" to the system, although they should always be "red".
The fix is to explicitly add a dependency on the artificial "always red" dep-node when feeding during eval-always queries.
Fixes https://github.com/rust-lang/rust/issues/108481
Maybe also fixes issue https://github.com/rust-lang/rust/issues/88488.
cc `@jyn514`
r? `@cjgillot` or `@oli-obk`
Split `execute_job` into `execute_job_incr` and `execute_job_non_incr`
`execute_job` was a bit large, so this splits it in 2. Performance was neutral locally, but this may affect bootstrap times.
