Auto merge of #96745 - ehuss:even-more-attribute-validation, r=cjgillot

[rust.git] / clippy_lints / src / mem_forget.rs

diff --git a/clippy_lints/src/mem_forget.rs b/clippy_lints/src/mem_forget.rs
index eb437dc47afb496e63b0bfc37e28a3d209a29f7d..d6c235b5a693a96975c006c3f5ee123f17a82fa5 100644 (file)
--- a/clippy_lints/src/mem_forget.rs
+++ b/clippy_lints/src/mem_forget.rs
@@ -1,8 +1,8 @@
 use clippy_utils::diagnostics::span_lint;
-use clippy_utils::{match_def_path, paths};
 use rustc_hir::{Expr, ExprKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_span::sym;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -19,6 +19,7 @@
     /// # use std::rc::Rc;
     /// mem::forget(Rc::new(55))
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub MEM_FORGET,
     restriction,
     "`mem::forget` usage on `Drop` types, likely to cause memory leaks"
@@ -31,7 +32,7 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) {
         if let ExprKind::Call(path_expr, [ref first_arg, ..]) = e.kind {
             if let ExprKind::Path(ref qpath) = path_expr.kind {
                 if let Some(def_id) = cx.qpath_res(qpath, path_expr.hir_id).opt_def_id() {
-                    if match_def_path(cx, def_id, &paths::MEM_FORGET) {
+                    if cx.tcx.is_diagnostic_item(sym::mem_forget, def_id) {
                         let forgot_ty = cx.typeck_results().expr_ty(first_arg);
 
                         if forgot_ty.ty_adt_def().map_or(false, |def| def.has_dtor(cx.tcx)) {