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avoid building proof trees in select

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This commit is contained in:
lcnr
2023-07-10 15:17:01 +02:00
parent a482149598
commit 4965caf9be
5 changed files with 22 additions and 28 deletions
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4
compiler/rustc_trait_selection/src/solve/fulfill.rs
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@@ -57,7 +57,7 @@ impl<'tcx> TraitEngine<'tcx> for FulfillmentCtxt<'tcx> {
.map(|obligation| {
let code = infcx.probe(|_| {
match infcx
.evaluate_root_goal(obligation.clone().into(), GenerateProofTree::No)
.evaluate_root_goal(obligation.clone().into(), GenerateProofTree::IfEnabled)
.0
{
Ok((_, Certainty::Maybe(MaybeCause::Ambiguity), _)) => {
@@ -96,7 +96,7 @@ impl<'tcx> TraitEngine<'tcx> for FulfillmentCtxt<'tcx> {
for obligation in mem::take(&mut self.obligations) {
let goal = obligation.clone().into();
let (changed, certainty, nested_goals) =
match infcx.evaluate_root_goal(goal, GenerateProofTree::No).0 {
match infcx.evaluate_root_goal(goal, GenerateProofTree::IfEnabled).0 {
Ok(result) => result,
Err(NoSolution) => {
errors.push(FulfillmentError {