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Check that type_implements_trait actually is passed the right amount of generic params

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This commit is contained in:
Oli Scherer 2022-11-17 10:22:44 +00:00
parent 0c47deed9f
commit 250dcf421a
4 changed files with 23 additions and 15 deletions
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14
compiler/rustc_trait_selection/src/infer.rs
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@ -113,12 +113,20 @@ impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
fn type_implements_trait(
&self,
trait_def_id: DefId,
ty: Ty<'tcx>,
self_ty: Ty<'tcx>,
params: SubstsRef<'tcx>,
param_env: ty::ParamEnv<'tcx>,
) -> traits::EvaluationResult {
let trait_ref =
ty::TraitRef { def_id: trait_def_id, substs: self.tcx.mk_substs_trait(ty, params) };
let trait_ref = ty::TraitRef {
def_id: trait_def_id,
substs: self.tcx.mk_substs_trait(self_ty, params),
};
debug_assert_eq!(
self.tcx.generics_of(trait_def_id).count() - 1,
params.len(),
"wrong number of generic parameters for {trait_def_id:?}, did you accidentally include the self-type in the params list?"
);
let obligation = traits::Obligation {
cause: traits::ObligationCause::dummy(),