From b209ff27f32425e0d3a6ae704669a617f2f2235a Mon Sep 17 00:00:00 2001
From: mejrs <>
Date: Sat, 19 Nov 2022 13:31:51 +0100
Subject: [PATCH] Update trait check

---
 compiler/rustc_lint/src/builtin.rs | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/compiler/rustc_lint/src/builtin.rs b/compiler/rustc_lint/src/builtin.rs
index 1ea41098413f..4a0da9927c62 100644
--- a/compiler/rustc_lint/src/builtin.rs
+++ b/compiler/rustc_lint/src/builtin.rs
@@ -769,10 +769,13 @@ impl<'tcx> LateLintPass<'tcx> for MissingCopyImplementations {
         // We shouldn't recommend implementing `Copy` on stateful things,
         // such as iterators.
         if let Some(iter_trait) = cx.tcx.get_diagnostic_item(sym::Iterator) {
-            if cx.tcx.infer_ctxt().enter(|infer_ctxt| {
-                infer_ctxt.type_implements_trait(iter_trait, ty, List::empty(), param_env)
-                    == EvaluationResult::EvaluatedToOk
-            }) {
+            if cx.tcx.infer_ctxt().build().type_implements_trait(
+                iter_trait,
+                ty,
+                List::empty(),
+                param_env,
+            ) == EvaluationResult::EvaluatedToOk
+            {
                 return;
             }
         }