bjoernager/rust
bjoernager/rust
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add additional logging

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This commit is contained in:
lcnr 2024-02-26 10:12:40 +01:00
parent dc00e8cdb6
commit eeeb9b4d31
3 changed files with 8 additions and 1 deletions
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7
compiler/rustc_trait_selection/src/solve/assembly/mod.rs
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@ -777,6 +777,7 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
// FIXME(@lcnr): The current structure here makes me unhappy and feels ugly. idk how
// to improve this however. However, this should make it fairly straightforward to refine
// the filtering going forward, so it seems alright-ish for now.
#[instrument(level = "debug", skip(self, goal))]
fn discard_impls_shadowed_by_env<G: GoalKind<'tcx>>(
&mut self,
goal: Goal<'tcx, G>,
@ -799,7 +800,10 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
// This feels dangerous.
Certainty::Yes => {
candidates.retain(|c| match c.source {
CandidateSource::Impl(_) | CandidateSource::BuiltinImpl(_) => false,
CandidateSource::Impl(_) | CandidateSource::BuiltinImpl(_) => {
debug!(?c, "discard impl candidate");
false
}
CandidateSource::ParamEnv(_) | CandidateSource::AliasBound => true,
});
}
@ -807,6 +811,7 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
// to be ambig and wait for inference constraints. See
// tests/ui/traits/next-solver/env-shadows-impls/ambig-env-no-shadow.rs
Certainty::Maybe(cause) => {
debug!(?cause, "force ambiguity");
*candidates = self.forced_ambiguity(cause);
}
}