From 64fbdc37799b44a85a2dd6cb491ee96e6931cb5d Mon Sep 17 00:00:00 2001
From: lcnr <rust@lcnr.de>
Date: Fri, 14 Apr 2023 15:44:05 +0200
Subject: [PATCH]  explicit adt_dtorck_constraint for ManuallyDrop

---
 compiler/rustc_traits/src/dropck_outlives.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/compiler/rustc_traits/src/dropck_outlives.rs b/compiler/rustc_traits/src/dropck_outlives.rs
index b5924e949146b..58117c46f0430 100644
--- a/compiler/rustc_traits/src/dropck_outlives.rs
+++ b/compiler/rustc_traits/src/dropck_outlives.rs
@@ -292,7 +292,9 @@ pub(crate) fn adt_dtorck_constraint(
     let span = tcx.def_span(def_id);
     debug!("dtorck_constraint: {:?}", def);
 
-    if def.is_phantom_data() {
+    if def.is_manually_drop() {
+        bug!("`ManuallyDrop` should have been handled by `trivial_dropck_outlives`");
+    } else if def.is_phantom_data() {
         // The first generic parameter here is guaranteed to be a type because it's
         // `PhantomData`.
         let substs = InternalSubsts::identity_for_item(tcx, def_id);