3 files changed, 10 insertions, 4 deletions
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs
index 3fdb38a433e..76338be33aa 100644
--- a/compiler/rustc_middle/src/query/mod.rs
+++ b/compiler/rustc_middle/src/query/mod.rs
@@ -697,7 +697,7 @@ rustc_queries! {
         separate_provide_extern
     }
 
-    query implied_const_bounds(
+    query explicit_implied_const_bounds(
         key: DefId
     ) -> ty::EarlyBinder<'tcx, &'tcx [(ty::PolyTraitRef<'tcx>, Span)]> {
         desc { |tcx| "computing the implied `~const` bounds for `{}`",
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index b4d29f08a0f..55c29825fbc 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -393,12 +393,12 @@ impl<'tcx> Interner for TyCtxt<'tcx> {
         )
     }
 
-    fn implied_const_bounds(
+    fn explicit_implied_const_bounds(
         self,
         def_id: DefId,
     ) -> ty::EarlyBinder<'tcx, impl IntoIterator<Item = ty::Binder<'tcx, ty::TraitRef<'tcx>>>> {
         ty::EarlyBinder::bind(
-            self.implied_const_bounds(def_id).iter_identity_copied().map(|(c, _)| c),
+            self.explicit_implied_const_bounds(def_id).iter_identity_copied().map(|(c, _)| c),
         )
     }
 
diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs
index dd8286c8eb9..2bc055453a4 100644
--- a/compiler/rustc_middle/src/ty/mod.rs
+++ b/compiler/rustc_middle/src/ty/mod.rs
@@ -2110,7 +2110,13 @@ impl<'tcx> TyCtxt<'tcx> {
                     _ => bug!("unexpected parent item of associated item: {parent_def_id:?}"),
                 }
             }
-            DefKind::Closure | DefKind::OpaqueTy => {
+            DefKind::OpaqueTy => match self.opaque_ty_origin(def_id) {
+                hir::OpaqueTyOrigin::FnReturn { parent, .. } => self.is_conditionally_const(parent),
+                hir::OpaqueTyOrigin::AsyncFn { .. } => false,
+                // FIXME(const_trait_impl): ATPITs could be conditionally const?
+                hir::OpaqueTyOrigin::TyAlias { .. } => false,
+            },
+            DefKind::Closure => {
                 // Closures and RPITs will eventually have const conditions
                 // for `~const` bounds.
                 false