From fe2553fe585c8589200aa6097036a0da90d2bcfe Mon Sep 17 00:00:00 2001
From: Oli Scherer <github333195615777966@oli-obk.de>
Date: Sat, 17 May 2025 14:35:25 +0000
Subject: [PATCH] Use `!null` pattern type in libcore

---
 clippy_lints/src/transmute/transmute_undefined_repr.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/clippy_lints/src/transmute/transmute_undefined_repr.rs b/clippy_lints/src/transmute/transmute_undefined_repr.rs
index 3e6aae475ecc..c097f7773099 100644
--- a/clippy_lints/src/transmute/transmute_undefined_repr.rs
+++ b/clippy_lints/src/transmute/transmute_undefined_repr.rs
@@ -242,6 +242,10 @@ fn reduce_ty<'tcx>(cx: &LateContext<'tcx>, mut ty: Ty<'tcx>) -> ReducedTy<'tcx>
     loop {
         ty = cx.tcx.try_normalize_erasing_regions(cx.typing_env(), ty).unwrap_or(ty);
         return match *ty.kind() {
+            ty::Pat(base, _) => {
+                ty = base;
+                continue;
+            },
             ty::Array(sub_ty, _) if matches!(sub_ty.kind(), ty::Int(_) | ty::Uint(_)) => {
                 ReducedTy::TypeErasure { raw_ptr_only: false }
             },