From 921efd2e67076dca999129f85659a5f1a6b21212 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume.gomez@huawei.com>
Date: Mon, 16 Jan 2023 15:18:14 +0100
Subject: [PATCH] Add missing normalization for union fields types

---
 compiler/rustc_hir_analysis/src/check/check.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/rustc_hir_analysis/src/check/check.rs b/compiler/rustc_hir_analysis/src/check/check.rs
index 43795cfba3fd..248ff1d4cb50 100644
--- a/compiler/rustc_hir_analysis/src/check/check.rs
+++ b/compiler/rustc_hir_analysis/src/check/check.rs
@@ -121,7 +121,7 @@ fn check_union_fields(tcx: TyCtxt<'_>, span: Span, item_def_id: LocalDefId) -> b
 
         let param_env = tcx.param_env(item_def_id);
         for field in &def.non_enum_variant().fields {
-            let field_ty = field.ty(tcx, substs);
+            let field_ty = tcx.normalize_erasing_regions(param_env, field.ty(tcx, substs));
 
             if !allowed_union_field(field_ty, tcx, param_env) {
                 let (field_span, ty_span) = match tcx.hir().get_if_local(field.did) {