use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::ty::is_type_diagnostic_item;
+use clippy_utils::{expr_custom_deref_adjustment, ty::is_type_diagnostic_item};
use if_chain::if_chain;
use rustc_errors::Applicability;
use rustc_hir::{Expr, Mutability};
pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, ex: &'tcx Expr<'tcx>, recv: &'tcx Expr<'tcx>, name_span: Span) {
if_chain! {
+ if matches!(expr_custom_deref_adjustment(cx, recv), None | Some(Mutability::Mut));
if let ty::Ref(_, _, Mutability::Mut) = cx.typeck_results().expr_ty(recv).kind();
if let Some(method_id) = cx.typeck_results().type_dependent_def_id(ex.hir_id);
if let Some(impl_id) = cx.tcx.impl_of_method(method_id);
*value += 1;
}
+fn issue9415() {
+ let mut arc_mutex = Arc::new(Mutex::new(42_u8));
+ let arc_mutex: &mut Arc<Mutex<u8>> = &mut arc_mutex;
+ let mut guard = arc_mutex.lock().unwrap();
+ *guard += 1;
+}
+
fn main() {}