place evaluation: require the original pointer to be aligned if an access happens

1 files changed, 4 insertions, 2 deletions

diff --git a/compiler/rustc_const_eval/src/const_eval/eval_queries.rs b/compiler/rustc_const_eval/src/const_eval/eval_queries.rs
index 4adfbe336af..6b612c34837 100644
--- a/compiler/rustc_const_eval/src/const_eval/eval_queries.rs
+++ b/compiler/rustc_const_eval/src/const_eval/eval_queries.rs
@@ -1,3 +1,5 @@
+use std::mem;
+
 use either::{Left, Right};
 
 use rustc_hir::def::DefKind;
@@ -73,9 +75,9 @@ fn eval_body_using_ecx<'mir, 'tcx>(
             None => InternKind::Constant,
         }
     };
-    ecx.machine.check_alignment = CheckAlignment::No; // interning doesn't need to respect alignment
+    let check_alignment = mem::replace(&mut ecx.machine.check_alignment, CheckAlignment::No); // interning doesn't need to respect alignment
     intern_const_alloc_recursive(ecx, intern_kind, &ret)?;
-    // we leave alignment checks off, since this `ecx` will not be used for further evaluation anyway
+    ecx.machine.check_alignment = check_alignment;
 
     debug!("eval_body_using_ecx done: {:?}", ret);
     Ok(ret)