X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=compiler%2Frustc_trait_selection%2Fsrc%2Ftraits%2Ffulfill.rs;h=19efc29762143adf4506618b16bf6fba8bb32513;hb=292f0c599fee4e5feae66d57a00be0af505c74d2;hp=f13736a76b21450cca5f93f87fbc7e0a5a911155;hpb=7cd4780c91139334b0a3a1f118b477506dd567dd;p=rust.git

diff --git a/compiler/rustc_trait_selection/src/traits/fulfill.rs b/compiler/rustc_trait_selection/src/traits/fulfill.rs
index f13736a76b2..19efc297621 100644
--- a/compiler/rustc_trait_selection/src/traits/fulfill.rs
+++ b/compiler/rustc_trait_selection/src/traits/fulfill.rs
@@ -495,19 +495,20 @@ fn process_obligation(
                 }
 
                 ty::PredicateKind::ConstEquate(c1, c2) => {
+                    assert!(
+                        self.selcx.tcx().features().generic_const_exprs,
+                        "`ConstEquate` without a feature gate: {c1:?} {c2:?}",
+                    );
                     debug!(?c1, ?c2, "equating consts");
-                    let tcx = self.selcx.tcx();
-                    if tcx.features().generic_const_exprs {
-                        // FIXME: we probably should only try to unify abstract constants
-                        // if the constants depend on generic parameters.
-                        //
-                        // Let's just see where this breaks :shrug:
-                        if let (ty::ConstKind::Unevaluated(a), ty::ConstKind::Unevaluated(b)) =
-                            (c1.kind(), c2.kind())
-                        {
-                            if infcx.try_unify_abstract_consts(a, b, obligation.param_env) {
-                                return ProcessResult::Changed(vec![]);
-                            }
+                    // FIXME: we probably should only try to unify abstract constants
+                    // if the constants depend on generic parameters.
+                    //
+                    // Let's just see where this breaks :shrug:
+                    if let (ty::ConstKind::Unevaluated(a), ty::ConstKind::Unevaluated(b)) =
+                        (c1.kind(), c2.kind())
+                    {
+                        if infcx.try_unify_abstract_consts(a, b, obligation.param_env) {
+                            return ProcessResult::Changed(vec![]);
                         }
                     }