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-rw-r--r--compiler/rustc_ty_utils/src/ty.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_ty_utils/src/ty.rs b/compiler/rustc_ty_utils/src/ty.rs
index 1d345caf699..d542a9b5997 100644
--- a/compiler/rustc_ty_utils/src/ty.rs
+++ b/compiler/rustc_ty_utils/src/ty.rs
@@ -126,7 +126,7 @@ fn param_env(tcx: TyCtxt<'_>, def_id: DefId) -> ty::ParamEnv<'_> {
     // are any errors at that point, so outside of type inference you can be
     // sure that this will succeed without errors anyway.
 
-    if tcx.sess.opts.debugging_opts.chalk {
+    if tcx.sess.opts.unstable_opts.chalk {
         let environment = well_formed_types_in_env(tcx, def_id);
         predicates.extend(environment);
     }