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-rw-r--r--compiler/rustc_lint/src/reference_casting.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_lint/src/reference_casting.rs b/compiler/rustc_lint/src/reference_casting.rs
index 63d55a73a98..b80e90c25a3 100644
--- a/compiler/rustc_lint/src/reference_casting.rs
+++ b/compiler/rustc_lint/src/reference_casting.rs
@@ -202,7 +202,8 @@ fn is_cast_to_bigger_memory_layout<'tcx>(
 
     // if the current expr looks like this `&mut expr[index]` then just looking
     // at `expr[index]` won't give us the underlying allocation, so we just skip it
-    if let ExprKind::Index(..) = e_alloc.kind {
+    // the same logic applies field access like `&mut expr.field`
+    if let ExprKind::Index(..) | ExprKind::Field(..) = e_alloc.kind {
         return None;
     }