1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/project.rs b/compiler/rustc_trait_selection/src/traits/project.rs
index 565f3f509db..a72f90746ed 100644
--- a/compiler/rustc_trait_selection/src/traits/project.rs
+++ b/compiler/rustc_trait_selection/src/traits/project.rs
@@ -618,11 +618,14 @@ impl<'a, 'b, 'tcx> TypeFolder<'tcx> for AssocTypeNormalizer<'a, 'b, 'tcx> {
         }
     }
 
+    #[instrument(skip(self), level = "debug")]
     fn fold_const(&mut self, constant: ty::Const<'tcx>) -> ty::Const<'tcx> {
         if self.selcx.tcx().lazy_normalization() || !self.eager_inference_replacement {
             constant
         } else {
             let constant = constant.super_fold_with(self);
+            debug!(?constant);
+            debug!("self.param_env: {:?}", self.param_env);
             constant.eval(self.selcx.tcx(), self.param_env)
         }
     }