Rollup merge of #100128 - kpreid:waker-doc, r=thomcc

[rust.git] / compiler / rustc_traits / src / type_op.rs

diff --git a/compiler/rustc_traits/src/type_op.rs b/compiler/rustc_traits/src/type_op.rs
index f8bac1d7b263f65c42a577b251fbbb4118f735c6..d895b647db0b144a8462330a83fdd4325c99e887 100644 (file)
--- a/compiler/rustc_traits/src/type_op.rs
+++ b/compiler/rustc_traits/src/type_op.rs
@@ -2,7 +2,7 @@
 use rustc_hir::def_id::DefId;
 use rustc_infer::infer::at::ToTrace;
 use rustc_infer::infer::canonical::{Canonical, QueryResponse};
-use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
+use rustc_infer::infer::{DefiningAnchor, InferCtxt, TyCtxtInferExt};
 use rustc_infer::traits::TraitEngineExt as _;
 use rustc_middle::ty::query::Providers;
 use rustc_middle::ty::subst::{GenericArg, Subst, UserSelfTy, UserSubsts};
@@ -258,10 +258,15 @@ fn type_op_prove_predicate<'tcx>(
     tcx: TyCtxt<'tcx>,
     canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, ProvePredicate<'tcx>>>,
 ) -> Result<&'tcx Canonical<'tcx, QueryResponse<'tcx, ()>>, NoSolution> {
-    tcx.infer_ctxt().enter_canonical_trait_query(&canonicalized, |infcx, fulfill_cx, key| {
-        type_op_prove_predicate_with_cause(infcx, fulfill_cx, key, ObligationCause::dummy());
-        Ok(())
-    })
+    // HACK This bubble is required for this test to pass:
+    // impl-trait/issue-99642.rs
+    tcx.infer_ctxt().with_opaque_type_inference(DefiningAnchor::Bubble).enter_canonical_trait_query(
+        &canonicalized,
+        |infcx, fulfill_cx, key| {
+            type_op_prove_predicate_with_cause(infcx, fulfill_cx, key, ObligationCause::dummy());
+            Ok(())
+        },
+    )
 }
 
 /// The core of the `type_op_prove_predicate` query: for diagnostics purposes in NLL HRTB errors,