From ac87b0cb73dc16df9413421119100001bf370d20 Mon Sep 17 00:00:00 2001
From: lapla-cogito <me@lapla.dev>
Date: Thu, 23 Jan 2025 12:40:12 +0900
Subject: [PATCH] fix ICE in `unnecessary_mut_passed`

---
 clippy_lints/src/mut_reference.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/clippy_lints/src/mut_reference.rs b/clippy_lints/src/mut_reference.rs
index c382fb8fce1b..2fd1049f42e1 100644
--- a/clippy_lints/src/mut_reference.rs
+++ b/clippy_lints/src/mut_reference.rs
@@ -54,8 +54,9 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryMutPassed {
                     );
                 }
             },
-            ExprKind::MethodCall(path, receiver, arguments, _) => {
-                let def_id = cx.typeck_results().type_dependent_def_id(e.hir_id).unwrap();
+            ExprKind::MethodCall(path, receiver, arguments, _)
+                if let Some(def_id) = cx.typeck_results().type_dependent_def_id(e.hir_id) =>
+            {
                 let args = cx.typeck_results().node_args(e.hir_id);
                 let method_type = cx.tcx.type_of(def_id).instantiate(cx.tcx, args);
                 check_arguments(