X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=compiler%2Frustc_hir_typeck%2Fsrc%2Fcast.rs;h=5e1e44dcb6d158d9d5321736ed46a1bd6ce50f24;hb=a673364c543986789cfbb844c925063519fb872a;hp=e5dc4b06c0ba620ade32f1d8a79b7feab64bd322;hpb=b4513ce6f835ed3f5c34a3ddc745d8cd3198cbf2;p=rust.git

diff --git a/compiler/rustc_hir_typeck/src/cast.rs b/compiler/rustc_hir_typeck/src/cast.rs
index e5dc4b06c0b..5e1e44dcb6d 100644
--- a/compiler/rustc_hir_typeck/src/cast.rs
+++ b/compiler/rustc_hir_typeck/src/cast.rs
@@ -498,10 +498,9 @@ fn report_cast_error(&self, fcx: &FnCtxt<'a, 'tcx>, e: CastError) {
                         let ty = fcx.tcx.erase_regions(ty);
                         let expr_ty = fcx.resolve_vars_if_possible(self.expr_ty);
                         let expr_ty = fcx.tcx.erase_regions(expr_ty);
-                        let ty_params = fcx.tcx.mk_substs_trait(expr_ty, &[]);
                         if fcx
                             .infcx
-                            .type_implements_trait(from_trait, ty, ty_params, fcx.param_env)
+                            .type_implements_trait(from_trait, [ty, expr_ty], fcx.param_env)
                             .must_apply_modulo_regions()
                         {
                             label = false;